This paper studies small eccentric compression test of eight waste fiber recycled concrete columns with recycled coarse aggregate replacement ratio, waste fiber length, and waste fiber incorporation as parameters. The test is carried out on the failure mode and ductility of the waste fiber recycled concrete...

The rising behavior of single bubble is investigated in 0.134 Eo 8.588; 0.82 We 4.83 and 0.5 Ta 3.6 by means of CLSVOF method and CSF model. The new empirical relations are obtained by comparing experimental data, simulated data and the empirical relations of scholars. The three formulas can describe...

In order to have a better understanding on the stability of roadway surrounding rock in QingFeng coal mine. Protodyakonov's theory is used to evaluate its stability theoretically, then a numerical simulation is conducted to analyze the stability of roadway surrounding rock in natural state by using the...

The safety performance of water landing is an important research for the amphibious aircraft. The interactions between the airplane structure and water belong to complex fluid-structure interaction(FSI) problem. The three-dimensional model of water landing for a certain type of amphibious aircraft’s...

In this paper, the vibrative theory of variable cross-section shear beam in structure dynamics was used in the analysis of landslide stability. The displacement, velocity and acceleration of the landslide were calculated with Duhamel technique in which the earthquake curve was used. This method in our...

This paper studies the calculation of active earth pressure of retaining structure under the condition of earthquake. By comparing with the Rankine theory and Coulomb theory, we get a very good result. The analytical solutions of the previous works are for single homogeneous isotropic filling .but in...

The natural frequencies of vibration and the corresponding mode shapes of a suspension bridge with varying bending stiffness of cables are determined, and the changes that occur in these characteristics with respect to parametric changes in the bridge are examined. Single span L=64,0 m suspension steel...

Based on statics assumption and simplifications, the force and failure mode of deepwater long-line rope aquaculture facility system were analyzed, and maximum tensions of the mooring rope in the system in different sea wave heights (1~7m) were calculated to compared to its break strength and mooring...

The Pinglidian gold mine locates at the Laizhou city, Shandong province, China. Up to 2013, the orebodies had been mined out, however, there is leaving mined voids of about 120,000 m2 and also leaving a large number of ore pillars. The residual pillars have to be recovered. In order to safely recover...

A Parametric design method for weak area structure of circle composite fragile cover was proposed by analysis of mechanical properties of circle composite fragile cover and weak area structure, which was confirmed by rush experiments. Firstly, boundary conditions of the weak area structure were determined...

Based on the theory of stress control for rock burst prevention, rigid-flexible integrated support with energy absorbing was found. In this paper, we tested between flexible yield support and rigid-flexible integrated support with energy absorbing. The results showed that the frequency of rock burst...

The dynamic responses of jack-up platform, in floating state, are calculated numerically. The finite element models of a jack-up are made. And the dynamic responses of the jack-up are simulated when the spud-can is driving downwards at different depths while the jack-up platform is floating on the sea[1]....

Based on unsteady Navier-Stokes equations, dynamic response in vertical gust flow perturbation is investigated for the aircraft. The grid velocity method was introduced to simulate the gust influence in time domain. First, after applying this method to simulate typical NACA0006 airfoil gust response...

The angular cross section profiles are increasingly used in tall pole structures such as telecommunication towers, transmission towers and wind energy turbine supporting towers. So, this work is based on the aerodynamic study of this type of profiles for three types of considered arrangement of profiles....

The advancement of technological society in general has stimulated in various fields, such as aeronautical civil mechanical naval and offshore engineering, a need to look for more sophisticated structural solutions. In many cases these solutions resort to lattice towers that, in order to meet several...

This work aims at modeling and designing a transmission pole structure for further investigation of the economic benefits associated with various grades of steel. Indeed, it was necessary to develop a population of possible design cases, to check structural safety, from which were selected the less expensive...

The work aims at designing a transmission pole structure which global security and stability is ensured through the application of the general method for verifying the lateral flexional buckling and lateral torsional buckling of structural components, as present in Eurocode 3 (EC3).

A practical method to calculate the prestressing forces of suspendome structures using force method is put forward in this paper. For a suspendome structure having n hoop cables, n control points can be selected. A system of linear homogeneous equations with n unknown cable forces can be obtained through...

As Chinese development of marine resources intensifies in recent years, more and more offshore platforms and buildings, island structures are under construction. However, concrete aggregate and freshwater resources which are used to mix concrete are usually limited in coastal areas or on the islands....

According to the white strong expansive soil in Guangxi Zhuang Autonomous Region of China, the relationship between the processes of crack propagation in tunnel face with the engineering properties is investigated by using the scanning electron microscope. It can be observed that the crack of expansive...

Outlet structures were apt to occur cavitation damages with high speed flow, and aerators were usually adopted to reduce and eliminate cavitation damages in hydropower project. In this paper, the Realizable k- model and the Volume of Fluid method were used to simulate the characteristics of cavitation...

In deep sea or temporary application, the floating breakwater should be best used to attenuate the surface wave. But the most difficulty of floating breakwater is to decrease long wave length wave. Bragg resonance condition appears while incident surface water wavelengths are approximately twice the...

Estimating the sailing resistance of unmanned submersible vehicle when navigating in the water is an important part for designing the hull profile. As there is no wave resistance when the unmanned submersible vehicle navigating in the water, so the main hull resistance mainly includes friction resistance...

In this paper, a planing boat has been selected as the research object, which has been used as a model to make a new model by scaling. And the free decay experiments have been conducted under different states including different rolling angle, different pitching angle and different ship's draft, whose...

The determination of material traces is to meet the needs of the Subsequent production process and conveyor boom exciting force dynamics calculations. According to the conveyor’s performance parameters, the thickness of the material layer can be known, in the course of calculating material traces; By...

The course, speed and duration of degradation of sludge-MSW mixture, which are major factors affecting settlement of landfill, have a direct impact on the stability and reuse of landfill. As today’s quantitative study on refuse degradation focuses on municipal solid waste (MSW), this paper seeks to find...

This paper presents the direct kinematics of a 3-PRS parallel manipulator. Through analysis position, the direct kinematics model is established, which is a nonlinear system of three equations in three unknown. The equations are derived using recursively the Sylvester dialytic elimination method. Finally,...

Cementitious capillary crystalline waterproofing coating is a new-type waterproofing agent. It makes up for many shortcomings of traditional waterproofing coating on properties and application. The paper described the waterproof mechanism in detail. The main characters, the technological process, the...

The constitutive model of materials is essential to nonlinear analysis, in this paper, uniaxial constitutive models of reinforcement and concrete are summarized, and some meaningful uniaxial models of concrete and reinforcement are proposed.

The main idea in function generating synthesis of the planar mechanism is the design of a mechanism so that to provide a prescribed trajectory. In this paper a general method for dimensional synthesis is proposed. The synthesis equation is the nonlinear equation with three unknowns, and the equations...

To explore the heat and fluid flow characteristics of normally impinging round air jet, a large eddy simulation (LES) of the jet flow at a jet-issuing Reynolds number of 4400 for a orifice-to-plate distance equal to five jet nozzle diameters was encompassed using a computer code OpenFoam. A comparison...

In western Canada, the heavy oil thermal recovery technology SAGD (steam-assisted gravity drainage) has been widely used in heavy oil recovery, and achieved good production effect. In this paper, the engineering background is that during the SAGD process at a Canadian oil sands block, trying to obtain...

The combustion stability of low concentration methane in a perfectly-stirred reactor is numerically studied by Chemkin software and GRI-Mech 3.0 mechanisms, considering the influence factors of residence time, methane concentration, preheating temperature and heat loss, the following conclusions can...

This paper establishes models for all the components of hot dip galvanized fasteners under working conditions, and also carries out assembly modeling based on their assembly relationships. Subsequently, these operations including finite element mesh generation, restriction of boundary conditions, definition...

This work applies the radial basis function-finite difference method (RBF-FD) for the solution of 2D elastic problems. Compared with traditional finite difference methods based on polynomial interpolation, the RBF-FD does not require a regular arrangement of nodes but can achieve high accuracy. With...

According to present deficiency of gravity retaining wall design method and considering the fuzzy uncertainties of the parameters of stochastic variables, first-order second-moment method (FOSM) is adopted to set up fuzzy random reliability analyzing model. By using decomposing theorem and by introducing...

Large eddy simulation (LES) for a supersonic Mach 1.8 flow past 2D cavities with/without passive control is carried out to investigate the characteristics of oscillations, and the dynamic mode decomposition (DMD) is used to identify the dominant flow structures with pertinent frequencies. A passive control...

The effect of freeze-thaw cycles on dynamic mechanical properties of the ceramsite concrete is studied by using SHPB device. The specimens with different ceramsite volume fraction and subjected to 0, 10, 20, 30 and 40 cycles of freeze-thaw respectively, are tested. The experimental results showed that...

Applied fatigue damage mechanics and finite element method to study the fatigue crack initiation life problems of component. Fatigue crack initiation life is obtained by using the method of additional load, just a stiffness matrix calculation, greatly reducing the workload of calculation. With the damage...

The three-dimensional shock-bubble interaction is investigated numerically using high-resolution piecewise parabolic method, in which both the viscous and turbulence effects are considered. The bubble is fixed at the same size and is accelerated by a planar shock wave of different strengths, in which...

The traditional damper is inconvenient for high-rise structure. The rotor of gimbal gyroscope has two rotational degrees of freedom, and the gyroscope produce moment to resist two orthogonal displacements when the rotor rotates with high speed, so the structure deformation under external force can be...

Seismic control of the horizontal and torsional response by cylindrical tuned liquid dampers is studied. The hydraulic pressure model of the cylindrical TLD including pulse pressure and convection pressure is established by membrane analogy method. The torsional model of the cylindrical TLD is obtained...

The present research argues that the shear stress of shaft in torsion is not a true stress but an equivalent stress, based on the phenomena that the stress disproves the plane assumption, that the body part in torsion is unable to maintain equilibrium, and that shear stress on the longitudinal section...

In this study, Perzyna visco-plasticity theory and Nishihara component model were combined to establish a universal creep constitutive model for describing the entire process of creep, including transient creep, steady-state creep and accelerating creep. Based on the internal energy theory, the constitutive...

Dynamic response of a functionally graded material circular plate subjected to thermal shock is investigated based on the von Kármán’s plate theory. The geometric imperfections of the plate are taken into account and the bottom surface of the circular plate is subjected to uniform thermal shock loadings....

Based on Euler-Bernoulli beam theory, the dynamic buckling of a functionally graded beam subjected to thermal shock is investigated in the Symplectic space. The boundaries of the FGM beam are simply supported at one end, and the other is clamped. The dynamic buckling problem is reduced to zero-eigenvalue...

The earth excavation and supports technology of the connection engineering on the both banks of The River Bridge have ability the characteristics of deep earth excavation, large area, traffic road surface and underground culvert .The entire foundation pit uses the spu-400larsen steel sheet shutter pile...

Taking into account the impact of the flexural and in-plane vibrations, an improve Fourier series method is employed to analyze the vibration of moderately thick coupled plates. The vibration displacement is sought as the linear combination of a double Fourier cosine series and auxiliary series functions....

During the metro station construction, it is always inevitably encounter to lots of crossing some adjacent structures by side of those. The Chegongmiao subway station is adjacent to the first subway of Shenzhen and Fengshengding shopping street, which is on the planning construction of Shenzhen 11th...

In this paper, the Finite Element Method (FEM) is used to study the topology optimization of bus body structure by Altair-OptiStruct software. Firstly, based on the maximum principle of optimization space, the topology optimization area is established. Then the topology optimization is calculated under...

Based on theoretical research as well as in situ tests, this paper reveals behavior features of mining pressure appearance and the performance of supports for fully mechanized long wall face in Ulan Moron Mine. Depending on systematic analysis of features of working face mine pressure from field tests...

Wheelset driving system is a key function unit of CNC underfloor wheelset lathe, its properties and accuracy play a decisive role for working accuracy of the wheelset (trains, subways etc) tread. At first, it analyses the force of cutting point for wheelsets, and then, contact mechanics analysis and...

Based on the theory about the electrostatic, the non-uniformly distributed load and the coupling between the electrostatic force and the deformation of the flexible beam are considered, the deformation analysis of the electrostatic driven flexible beam is done, the mathematic model about the deformation...

M method adopted in Chinese code is linear elastic subgrade reaction method, while the pile-soil interaction is extremely complex process and with greater limitations. P-y curve method is used to calculate the pile foundation; solid element method and monitoring results were compared and analyzed. The...

For imprecise stress solution of the plastic range near mode-I crack line of infinite wide plate under unidirectional uniform stress in relevant research literatures, this paper, by virtue of Mohr-Coulomb yield criterion and line field analytical method, re-infers and solves the stress general solution...

Dynamic modeling and active vibration control for a typical flexible solar array of spacecraft by using piezoelectric actuators is discussed. It is different from the simplified beam or plate model for the solar array in the literate, a coupled dynamic model of the solar array with piezoelectric actuators...

Based on Adina finite element software, this paper established elaborate model in consideration of the fluid-structure interaction between structure and air, then compared the stress between on-site monitoring and the simulation which the wind speed is 5m/s. Finally, based on the Davenport wind speed...

Quasi-elastic contact method can be used to study the wheel-rail contact relationship of worn tread. In this paper, wheel-rail contact relationship of standard and worn LMA tread have been calculated under the condition of rigid contact and quasi-elastic contact. By comparing with rigid contact which...

The purpose of this research is to put forward a fatigue strength test method for the key parts of the carbody. The body is an important load-bearing part of railway vehicle. The underframe is the basis of carbody structure, is the most main body bearing part. This paper put a more in-depth discussed...

Municipal solid waste (MSW) is a special kind of porous media with a large amount of degradable composition. A biochemo-hydro-mechanical (BCHM) coupled model is presented with a consideration of MSW degradation characteristic different from traditional soils. The cellulose anaerobic degradation model...

Micro-piles are widely used because of its own advantages, but relatively few theoretical studies about its anti-slide mechanism. Through the different pile spacing under three rows of micro pile reinforcement debris landslide indoor model experiment to study the micro-piles against sliding mechanism....

To operating subway shield tunnel with straight joint in soft soil area as analysis object, with statistical analysis of seven-year elevation and settlement data, and introduction of per meter elevation difference and per meter settlement difference, systematic research on the distribution and long-term...

Railway subgrade mud pumping is one of the most common defects. Unfavorable combination of soil, water, dynamic load is the main cause of subgrade mud pumping. Based on the source of water causing railway subgrade mud pumping, it can be divided into 5 major categories; on the basis of three stages forming...

Due to the scarcity of the characteristics of land resources, the number of ultra-high-rise building and underground engineering is becoming more and more in the town and its surrounding area, coupled with overexploitation and use of groundwater in some areas, the deformation of engineering and construction...

In order to effectively control the emissions, a MHD assisted mixing technique is presented and a MHD assisted mixing experiment system is developed. The experiment shows that with the help of MHD assisted mixing technique, the contacting surface between fuel and oxidant increase, thus make the combustion...

In this paper, a theoretical algorithm using united Lagrangian-Eulerian method was presented to study the fluid-structure interaction (FSI) problems. This method was used to solve the large deformation of the elastic plate in a continuous cross-flow of ideal fluid. In this approach, material was described...

Parameters selection plays an important role in the model updating and a good parameters selection improves the efficiency of model updating. The sensitivity and the significance method are widely used for parameters selection. The theory and application are researched. A real structure was selected...

When the vehicle is running, there is resonance phenomenon if the frequency of excitation is equal to the natural frequency of vehicle. But it can change the frequency of the new system when a traction transformer is hung under the car-body. In a certain extent, it can avoid the resonance. Meanwhile,...

It is known that vehicle structural thickness change will lead to vehicle modal characteristics change .In this paper, the thickness of floor, sidewalls and vehicle top are chosen as the variables so as to calculate the relationship amongst thickness change and frequencies (Vertical bending- f1, Torsion-...

Through conducting the GDS dynamic triaxial test, this paper makes an analysis for the deformation characteristics of soft soil and its settlement mechanism under the subway traffic traveling load in Wuhan area. The test result shows that the cumulative plastic strain and pore water pressure of the soft...

The influence of piles design parameters such as pile diameter, pile length and pile stiffness on dynamic deformation characteristics of gravel pile composite foundation and CFG pile composite foundation was analyzed. The calculation results show that the influence of pile diameter on dynamic deformation...

In this paper, a new kind of methods, using magnetostrictive ultrasonic guided wave technology, is introduced to the health detection of round steel used in industry of power system. Based on the magnetostrictive principle, designed a magnetostrictive guided wave sensor. According to the characteristics...

Laboratory experiments with silicone cylinders simulating flexible vegetation, the Acoustic Doppler velocimetry (ADV) measuring the flow field were performed to investigate the turbulence characteristics of open-channel flow with flexible vegetation. The results and analysis indicate that mean bulk velocity,...

With the development of infrastructure, the problem of cracks in concrete structures is getting more and attention. Cracks will not only affect the appearance of the structure, if the cracks width are too large, even they can pose a threat for the durability and safety of structures, therefore we need...

Producing large-scale and uniform plasma in supersonic field is the foundation of researching cold Magnetohydrodynamic (MHD). The experimental system of capacitively coupled radio-frequency (CCRF) barrier discharge based on Ma3.5 double-throat tunnel is established, and the discharges in the condition...

Mechanical behavior of granular media is important in many fields of studies such as the deformation of soil, slope stability, or the bearing capacity and so on. The mechanical behavior of granular media has been studied by borrowing the stress-strain models, such as elastic, elasto-plastic, or plastic...

In this paper, the fracture models on FRP-concrete bonded interface are summarized and compared for concrete structures externally reinforced with FRP plates. The energy release rates of the unified model of bi-material interface fracture specimens under the transverse and moment loads by the rigid,...

A new Y-block design’s function and hydraulic performance were verified through numerical methods and experimental validation. The velocity fields of its internal flow channel and turbulence energy under different opening levels were analyzed by ANSYS. Combined with experiments, the automatic switching...

In order to study the lining longitudinal deformation rule under the influence of the lining transverse deformation in the process of long-term settlement of operating metro shield tunnel with straight joint, based on the field test monitoring data of Tibet Road-Zhongxing Road shield tunnel in the M8...

In this paper, the damping characteristic of resinous cast material is analyzed first, then theoretic calculation and a series experiments are designed to find damping effect to the joining configuration. The result is the gist to estimate the damping capacity of the new joining configuration, which...

One of the direction of rough sets theory is to extend the equivalence relation, using more general binary relation such as the partial order relation, tolerance relation or similarity relations instead of the strict equivalence relation. So the scope of application of rough sets theory could be extended....

Two computer models of concrete frame with staircase were made and the seismic-performance of the models in elastic-phase was calculated by adopting base shear method, spectrum analysis by ETABS. The results show that including staircase into models will change the seismic performance of frame structure...

Some kinds of slope slipping induced by seismic liquefaction are researched and listed by summarized the earthquake –disasters ,the status and conditions of liquefied soil layer including faults, the level of underground water ,buried-depth, the angle ,thickness and scope of liquefied soil layer are...

In this paper, for four groups of recycled concrete specimen in early shrinkage and restraint cracking experiment, which the recycled aggregate replacement ratio of 100% and the waste fiber volume content of 0, 0.08%, 0.12%, 0.16%. Experimental results show that: when the volume content of waste fiber...

Carried out the pump concrete mix optimizing tests for Jinping II diversion tunnels secondary lining by preference tests of 4 kinds of fly ash, comparison tests of 7 kinds of water reducing agent, mixing with air-entraining agent, mixing with different kinds of cement, parameters selection test of standard...

With the development of economy and expansion of cities in China, land resource for construction is becoming scarce. Some important infrastructures, such as airports are located in mountainous areas where the engineering geological conditions are complicated. Due to the limitations of natural conditions...

The process of constructing breakwater project is a course of dumping rockfill. And the slit is squeezed out. The simulation of dumping rockfill is mainly by Lagrange or Euler algorithm. But these two algorithms have disadvantages in the process of simulating. The course of extruding slitl is a dynamic...

Using Finite-element Method to simulate prototype piles and then drawing the Load-settlement curves in order to calibrate the analysis software. When the simulation was consistent with the measured piles, taking it as the benchmark and then eight parameters were varied respectively so that the impacts...

Based on the theory of breakage mechanics, the structural soil are conceptualized as binary-medium model consisting of bonding brick and frictional band. Shear band is structural soils’ breakage, localization band sprout and development is dynamic process that bonding brick is translating into frictional...

Simplify the gyro rotor into a hollow disk, each particle in the disk circular motion around the z axis with High speed. At same time, it around y axis rotation follows the disc. That is, the disk does not rotation, but each particle in the rotor circular motion relative to the disk, at the same time,...

Being led by implementing the scientific development concept with three basic concepts of "the development of innovative", "people-oriented" and "coordinated", giving full play to “two major advantages” of new non-government college itself and making great efforts to develop “three growth points”, the...

The causes and mechanism inducing the breakdown and follow up displacement of an outflow pipeline off Penghu Islands, Taiwan was investigated. Based on the information illustrated in the high resolution side-scan sonar imagery, it was concluded that the breakdown of the pipeline was initiated by a large...

The outlook of Dongxiang area in Gansu province has been experiencing rapid changes with the acceleration of urbanization in recent years. A study needs to be conducted on local traditional architectural settlement to figure out how to realize “localization of modern architecture and modernization of...

To study the influence of composite action of floor slab on aseismic behavior of steel-concrete mixed frame structures, models of composite beam-concrete-filled square steel tubular columns frame structure (CB-CFST) and steel beam- concrete-filled square steel tubular columns frame structure (SB-CFST)...

This article analysis focuses on the key points of project cost management for contractors in each stage of construction from the aspect of the basic concepts of cost management, control methods of cost in the process of construction and principles of cost management. In the process of construction project...

Author thoroughly discussed the project cost risk determinants, and to analyze the formation stage of construction project cost risk, building construction project cost risk management mechanism. Author through the study of optimal allocation of resources based on the cost of construction projects planned...

Cultural industries are potential emerging industries in the 21st century. Historical and cultural heritage in Guangdong province are concentrated on the Pearl River Delta. The paper explains the foundation of development cultural industry cluster in the Pearl River Delta form demand, manufacture and...

The wind loads are one of the control loads on the high-rise building. Researchers in the wind engineering field have done numerous studies and have made plenty of achievements, which greatly promote the social development. Combining database system and advanced calculation languages, a MySQL-based software...

The location selection of the dispatch and control center of South-to-North Water Diversion Project is one of the fundamental aspects of the construction. However, the discussions are not enough. On the basis of analyzing and summarizing the influence factors, assessment indicators based on factor classified...

The paper introduces the application of isolated building in Wenchuan after Wenchuan earthquake. In the isolation design of the Second Primary School, combination isolation technology and viscous dampers were used to reduce the earthquake response of the upper structure, the upper structure can reduce...