For determining the reasonable ratio of spacing to diameter of double tunnels, the criterion is often only for the excavation, and does not take into account the earthquake situation. In order to ensure the stability of surrounding rock masses, safety and economic rationality during construction and...

For the long-span roof structures which have relatively low frequency and light mass, the vibration property under the action of fluctuating wind is significantly influenced by the added mass and aerodynamic damping. Since the influence can be reflected by the change of structural frequency and damping...

The Bohai Strait cross-sea channel, an undersea tunnel, is proposed to connect Dalian, Liaoning province and Penglai, Shandong province. The construction of the Bohai Strait cross-sea channel project can restrict the important project of national development from a certain angle, and it is helpful to...

Reactive powder concrete (RPC) is a cement-based material with excellent flexural strength. This study focuses on the flexural strength and maximum fluidity of RPC mixed with superplasticizer and steel fiber. In order to explore an optimized mix proportions of RPC, we make a research on the influences...

At present, in excavation of the coal mine roadway, it is widely used to a full section of millisecond blasting in borehole depth of about 2.0m. A lot of practice shows that, due to the influence of geological conditions, drilling, charge and other factors, footage per cycle reaching 2.5 ~ 3.0m, there...

In order to do planning for explosive area, simplified explosion planning calculation model is built based on the relative certainty of chemical explosion. First, simplified explosion-structure mutual model is built to calculate the force situation. This model adopts the peak overpressure calculation...

In 2015 halved and below 1.6 liters of displacement passenger car vehicle purchase tax policy, from the displacement of 1.6 liters and below passenger car sales, auto industry structure upgrade effects on energy saving and emission reduction, analysis of the policy effects on 6 aspects of the influences...

Deep basement excavation inevitably induces stress changes in the ground leading to soil movements, which may cause adverse effects on existing tunnels. Although basement-tunnel interaction has attracted increasing attention recently, the influence of circular basement excavation on metro tunnels is...

This paper discusses the design and development of the campus system from the following aspects: the overall structure of the system, the functions of each subsystem, and the key skills and difficulties.

The linear regularity of the strain distribution about new composite T-shaped concrete-filled steel tubular columns on the multiple sections was analyzed by ABAQUS. The plane-section assumption of new composite T-shaped concrete-filled steel tubular columns was studied under the axial loading and lateral...

According to the trait of Integrated Transportation Hub that it involves amount of stakeholders, dissevering the conflict management process will result in describing conflict inaccurately and keeping the conflict unresolved. Regarding of integrating the quantitative and qualitative approaches, we consider...

Based on BIM, cloud platform, internet of things and other advanced technology, this study establishes a monitoring cloud platform used in the bridge construction. It solved the key technology application issues such as formulating bridge BIM implementation standards and engineering breakdown structure...

A field experiment was carried out on an intertidal flat of the Yellow River delta to study the consolidation process of sediments under different salinity fields. Three test pits were excavated to simulate newly deposited seabed by backfilling well-mixed sediments with water in different salinities....

Modal parameter identification plays an important role in the dynamic performance evaluation and design of seismic structures. In this paper, we tested the large span space steel structure laboratory in a university, and then got modal parameters such as frequency and vibration mode based on the assumption...

The measurement result representation must contain both the value to be measured and the measurement uncertainty associated with the value, which is complete and meaningful. When the pavement permeability coefficient is measured on the road, the measurement results are given to the pavement seepage coefficient,...

One major problem when using ber reinforced polymer (FRP) to strengthen structures is the presence of high interfacial shear stresses near the end of the RC beams which might impact on the debonding failure modes and working mechanism. Interfacial debonding failure may occur at the plate ends due to...

Debonding of fiber reinforced polymer (FRP) is a main premature failure of RC beams strengthened with FRP plate, which is mainly due to the interfacial slip between FRP and concrete beam. The interfacial slip is one of the key factors to affect the behaviors of RC beams strengthened with FRP plate. Under...

In the field of engineering management practice in today's China, the theoretical research of project success is still a hot topic. On the basis of literature and Chinese context, the project success factors are summarized for the Chinese construction projects, and the hierarchical structure model of...

The Dirichlet-to-Neumann method is adopted to calculate the band gaps of the two-dimensional phononic crystals with different interface conditions. The system is in a square lattice which is composed of the solid cylinders embedded in a softer material. The cross sections of the inclusions are circular....

GRC is a concrete made of glass fiber, acting as reinforce matrix, and combined with cement. It has high tensile, bending and anti-impact properties. However, due to its endurance problem, it is prohibited in industry applications. In the recent thirty years, many researchers have investigated its endurance...

This paper presents a new behavioral model for TiO2 resistive random access memory (RRAM). The model is based on hierarchical transformation filament theory, the device parameters are obtained from an Au/TiO2/Au MIM (Metal/Insulator/Metal) RRAM cell with 100 nm in diameter, 50 nm-thick TiO2 thin film....

The Contour tracing method can automate extraction of tidal datum referenced shorelines from light detection and ranging ( LiDAR) data. With this method, shorelines are derived easily, but they are too broken, meandering and trembly. So an improved contour tracing method is put forward in this paper....

This paper presents a new W-shape resilient wheel and bases on "UIC510-5 Technical approval of monolithic wheels (2003)" standard for strength analysis. The calculation results show that in five kinds of working conditions, the elastic components strength of wheel meets the design requirements. New W-shape...

The time-averaged shear-wave velocity to the depth of 30 m (VS(30)) is the most important site specific parameter in seismic building codes and ground motion prediction equations (GMPEs). So far, there are several models to estimate VS(30) from average velocities to depths less than 30m VS(Z). 206 borehole...

Vegetation in river effect on flow and sediment transport. Based on the main research results, this paper divided the study of effect of vegetation on flow and sediment transport into three aspects: flow resistance, turbulence structure and sediment movement. The flow resistance is mainly affected by...

Based on the cast-in-situ light composite insulation wall, through the experiment, analyze the natural frequency and the aseismatic performance of the wall. It is concluded that the natural frequencies of the wall before and after vibration test are 10.01Hz, which indicated the wall stiffness without...

The research of light thermal insulation composite wall has great significance to the study of alleviating the energy shortage situation and promoting the sustainable development of China. In this paper, the gray correlation analysis was carried out to determine the indicators that influence the bending...

Chongqi bridge is the longest-span continuous steel box girder bridge with an orthotropic steel deck in China. Due to the small thickness of both the deck plate and rib wall, the out-of-plane bending moments result in high local flexural stresses causing fatigue cracks to develop at the rib-to-deck joints....

Cantilevered construction is adopted in most concrete bridges with wide spans. Because of such factors as shrinking and gradually deforming of concrete, constructive error, and constructive load, the pavement cannot be perfectly flat when the bridge is accomplished. So it is necessary to adjust the linear...

Under abnormal climatic conditions, a large number of cutting slope deformation instability problems that plagued expressway operation have become one of the major security issues. The formation lithology, geological structure and other inner factors are closely related to the stability problem of expressway...

The present study established a numerical investigation on the behavior of concrete filled steel tube reinforced concrete (CFSTRC) columns under combined loading and two-opposite-side fire. The FEA model was verified by the experimental results of CFST columns subjected to non-uniform fire. The comparison...

For performance assessment and optimization design of the seepage control system in the Yagen underground powerhouse, a numerical method combining a substructure technique, the variational inequality formulation of Signorini's type and an adaptive penalized Heaviside function (short for SVA method) was...

In this paper, the transcritical CO2 system is experimental studied, influence of heat source on system performance is analyzed. The experimental results show that the cooling water flow has no obvious effect on the system performance and it may be owed to the limitations of this experimental device....

The Gangjiang No.2 Bridge is studied as the research object. In this paper, a finite element model is established by using ANSYS finite element analysis software in the engineering background of the cable-stayed bridge with double cable plane steel. The results show that it can get the result of the...

The Gangjiang No.2 Bridge is studied as the research object. The three-dimensional finite element bridge model is established with ANSYS 15.0 about static and dynamic characteristics of the bridge. The main girder and the main tower stress have enough safety storage, which can meet the specification...

Taking Chongqing Metro Line 5 tunnel project as an engineering example, which is a shallow buried large section tunnel. The finite element numerical analysis software MIDAS-GTS was used to establish the three-dimensional finite element model of the tunnel. The analysis data was compared with the site...

Taking Chongqing Metro Line 5 tunnel project as an engineering example, which is a shallow buried large section tunnel. Study on the length of core soil in the tunnel excavation. The numerical simulation software MIDAS-GTS was used to establish the three dimensional solid model which under different...

The design process of mixture ratio of foamed asphalt mixture is studied in the paper. By means of a series of asphalt test, the best foaming condition, mineral aggregate gradation and the best ratio of asphalt is determined. The road performance test of foam asphalt mixture is carried out to verify...

Pavement performance of Foamed Asphalt Mixture in Mid-Surface of Expressway is studied in the paper. The production process of foamed asphalt mixture in the construction site mixing station is briefly introduced. Experimental study on water stability of asphalt mixture by immersion Marshall test and...

The forming process and SET-RESET mechanism of Pt/TiO2/Al resistive random access memory (RRAM) are investigated. Forming process was implemented by consecutive voltage sweep instead of one-step operation. After forming process, bidirectional self-rectifying characteristics was exhibited. In following...

There is a close relationship between architectural color and the formation of urban social historical context, the formation of urban features, urbanÿresidents' attachment, and so architectural color is an important part of urban features. The paper generalizes architectural color features during various...

In order to describe the physical properties of -Pu from the microscopic scale, we perform molecular dynamics calculation using the analogy material Ag-Au alloy. The melting point, volume heat capacity and linear expansion coefficient of Ag-Au alloys with different doping levels were calculated by the...

Under the background of the current frequent emergencies, the problem of the processed grain emergency storage has the practical significance and theoretical value. This paper considers the facility location efficiency for processed grain emergency storage and coverage radius demands satisfaction differences,...

The paper constructs the model of nuclear materials and fast neutron multiplicity counter, and obtains the mass of nuclear materials by utilizing the equation of fast neutron multiplicity. Via GEANT4 tool kit, the paper obtains the simulated results which are identical well to the results calculated...

By using finite element analysis to study the effects of different water-cement ratio and different fiber composition on the flexural properties of Reactive Powder Concrete beam. The results show that: Firstiy, under the same fiber combination, with the increase of water-cement ratio, the bending moment...

Passenger flow forecast is an important and functional part of urban rail transit operation and management, excellent and accurate passenger flow forecast can guide the operation management to achieve high efficiency and safety. This article mainly discusses the three forecasting models commonly used...

In order to prevent the occurrence of all kinds of safety accidents in urban rail transit project, the safety evaluation work is paid more and more attention. Safety evaluation work is a powerful guarantee for urban rail transit construction and operation safety. In this paper, AHP and comprehensive...

More population and less land is the main contradiction in the process of urbanization in China. Residential buildings developing upward and downward, such as the underground structure, not only made the impervious surface area increased, increasing more surface runoff, but also the underground impervious...

Rapid and rough economic development in southeastern China has led brownfields come to be big problems. In this study, heavy metal contaminated soil and sludge were used as raw materials for ceramsites making in a simulated calcination system. Different recipes of raw materials for ceramites making were...

A cellular element method turns the global analysis of the finite element method into a series of partial analyses. The final overall balance is achieved through the partial unbalanced transfer of force. The requirement for computer memory is extremely low and parallel algorithms are easy to implement....

The speed and distance measurement algorithm which is focus on experts and scholars in the field of railway signal is one of the core technology of VOBC (Vehicle On Board Controller), and many research results was born. Due to the practical application environments, equipment cost and some other issues,...

Urban rail transit plays an increasingly important role in conveying passengers when large special events are held. In order to analyze the impact of large special events on surrounding subway stations and provide the reasonable reference for the management department to organize passenger flow and make...

Comprehensively analyzed the patent laws in 18 Asian countries or areas , studied on the incentive mechanism of the patent maintenance fees system, then put forward some suggestions based on the patent maintenance fees system and the charging standard: The down payment on maintenance fees is of more...

The safety problem of silo has been the main problem in the world. When the wall is discharged, The dynamic pressure of the material on the silo wall is the main reason which leads to the destruction of the main body and the hidden trouble. Based on the datum from model test of silo, this paper mainly...

Solar energy is a pollution-free,ÿinexhaustible energy. The use of solar energy has been more and more widely noticed and one of the most practical technology is the solar energy heat utilization. This paper gives energy balance equations and exergy balance equations of the main instruments in a typical...

The isolation system has made great progress in China. The installation of the isolation bearing is gradually mature. However, due to the design requirements, there is no case of large-scale isolation bearing construction in China. A terminal building in the history of China's isolation bearing for the...

As a seismic method, rolling friction isolation has been born for over a century. Because of the increase of research interest, it has developed rapidly in recent years. Rolling friction isolation system according to the different types of roller can be divided into rod rolling friction isolation system...

Based on the regression analysis for 1918 seismic records, ductility demand probabilistic relationship with given earthquake intensity is formulated, and corresponding Bayesian network is established. With the given observation of earthquake intensity, the ductility demand posterior distribution is updated...

Green building has rapidly developed since it entered the Chinese construction market. But the design pattern and the design method is not suitable for some problems. This paper studied the design process, Personnel cooperation and advanced information technology sharing three aspects, and explored suitable...

In the accelerated development of urbanization in China, it is urgent to improve the anti-seismic capacity of multi story buildings. From the disaster situation of the Wenchuan, Yushu caused by earthquake, the concrete frame infill wall in the stairwell is severely damaged, bringing serious damage to...

This paper mainly studies the characteristics of the construction technology of laminated rubber damping bearing and sliding isolated bearing, the common problems and solutions in the construction process, which provides reference for the construction of the relevant isolation bearing in the future.

The fibrous beam element and common node method in ABAQUS software were used to set up a finite element model of PHC pipe piles , and the seismic performance of the PHC pipe piles were studied. UCONCRETE01 constitutive model and USTEEL02 constitutive model were respectively used for the concrete and...

With the example of The convention and exhibition center of Bainiao River, this paper discusses how the convention and exhibition center creates the space with regional characteristics and conforms to the development of the times by introducing the concept and design method of this project planning.

The preparation of high-strength mortar with super fine sand from waterway engineering and the improvement of its mechanical properties by mineral admixtures were studied in this paper. The effect of fly ash, silica fume and both of them on compressive strength and flexural strength of super fine sand...

Firstly, the finite element model of a certain car is established, and then according to the regulations and standards of FMVSS 216a's "top compressive strength of passenger car", the test simulation analysis for ceiling compressive strength is presented. By comparing the energy curve, the accuracy of...

As the city layout and adjustment of industrial structure, on the basis of the existing land area, in order to save land, improve land value, renovation of old harbor area regeneration is very necessary. A mature and perfect old harbor area regeneration is a multi-faceted fit, and how to update the old...

With the adjustment of the urban planning and the adjustment of industrial structure, many of the early urban industrial areas had gradually lost its original function, and entered a period of decline especially the port area. It is an urgent problem in urban planning, the problom that the original industrial...

The development of internet leads the innovation of the dispute resolution. As the innovative achievements under the strategy of "Internet+", online dispute resolution (ODR) is increasingly applied to the resolution of the disputes. Since ODR are cheap, convenient and flexible, it seems appealing to...