as one kind of airport, highway runway must be tested and assessed on scene before enable. Aimed at the situation of our country is short of performance index test regulations and methods, this research discussed the test characteristics and demands through several side like vehicle drive, traffic security,...

In order to investigate the the mathematical model considering the skewness-parameter, which covers the shortage of long-span bridge in sensitive parameter analyzing. Random variable along with its statistic probability model is taken. The application of influence coefficient helps to build up a determining...

In order to study the effect of pounding at expansion joints of beam bridge on the seismic responses of bridge structure during earthquake, the research is based on multi-particle of single degree of freedom system, and the pounding effects of adjacent girders on seismic responses with 3 different of...

When the construction wastes were used as raw materials of Recycled concrete, the type and replacement ratio of recycled aggregates should be considered in addition to mix proportion. It is very difficult to describe the complicated nonlinear relationship between different indexes. Through analyzing...

The purpose of this study is to calculate the reliability of the mechanical sand washing system. The basic principle and process flow of the sand washing system are introduced. According to the structural characteristic of the sand washing system, the simplified reliability model of the system is established....

The performance factors of a R290 variable frequency heat pump water heater are experimentally studied. The performance factors including COP, heating time, consumption power , compression ratio, degree of super heat and degree of sub cooling with the frequencies changing from 40Hz to 90Hz are discussed....

Integration of regional culture and urban park is an important approach of landscape transformation. Landscape reconstruction of modern urban park must fully excavate and coalesce the regional culture element, in order to create new landscape with more vitality. Based on regional culture and landscape...

Through summing up, statistical parameters of steel material property based on new standards and statistical parameters of geometry property of steel-concrete composite beams are obtained. Testing datum of steel-concrete composite beam in bending state and its connecting piece in shearing state is roundly...

In view of the complex factors affecting the reliability of the main shaft of a nuclear power CNC wheel milling machine, a finite element analysis model is established by using the ANSYS parametric modeling technique and the finite element analysis model of the machine tool spindle, which will affect...

The weak axis of I-section column welded the vertical stiffener to simulate the form of strong axis connection. The seismic behavior of joint region and the affections on the ultimate bearing capacity of beam by changing the thickness of skin panel have been analyzed. The hysteretic behavior of joint...

In this paper, a three-dimensional model of the melt conveying section of a PVC Wood-Plastic single-screw extruder has been constructed and the corresponding mesh file has been established through Mesh Superposition Techniques (MST). Then the rheological experimental results and material viscosity model...

The rock structure is extremely complex, it is difficult to reflect the mechanical properties and the relevant failure mechanisms truly under loads whatever by the theoretical analysis or the laboratory test. In order to analyze the damage characteristics of the crossover jointed rock mass from the microscopic...

Using city region as the study unit, this paper utilizes spatial statistical analysis methods to analyze the spatial distribution characteristics, spatial correlations, as well as the difference degrees of sector value-added growth rates for all cities of Henan province in 2011-2014. The results show...

The high ground temperature is a prominent problem in the construction of deep buried long tunnels. Based on the analysis of high ground temperature in existing tunnels, the influence of high ground temperature on tunnel construction was divided into three situations, namely the harm to human body, effects...

Monitoring is an important work to measure the rationality of tunnel design and construction, especially for highway tunnel with small spacing. The design of construction monitoring scheme was analyzed based on a practice of small spacing tunnel engineering. The method to determine the monitoring items,...

The construction of underground engineering will bring risks and potential hazards to the adjacent tunnel engineering. A series of numerical analysis models have been built to analyze the influence of underground engineering construction having on adjacent tunnel structure under different horizontal...

The paper utilizes the linear transformation in the analysis of covariance matrix of observed values about natural phenomenon, while computing eigenvalues, the corresponding determinant value is calculated , at last the relationship between the eigenvalues and determinant value is given.

A novel piezoelectric smart concrete beam composed of a concrete beam, a piezoelectric actuator and a counterforce device is developed and investigated. Based on the governing equation of ‘actuating force-voltage’ of piezoelectric actuator proposed by the authors, a nonlinear analysis program, in which...

In this paper, the rigid slab hypothesis, which is widely used in high-rise buildings, would be discussed. The modal analysis results for two building structures would be presented and compared based on the ISSS [1-4], with and without rigid slab hypothesis respectively. It could be observed from the...

According to disease investigation and analysis of cement concrete overlay of G322 secondary road, analysis model is built by ABAQUS finite element software, vehicle load stress, temperature stress and uneven settlement of widening subgrade and other external factors of cement overlay are considered,...

In this paper, we created a remote mobile controlled and monitored vehicle system, which is used in the self-driving and self-parking cars for the last kilometer. The system consists of three main parts: the car-mounted terminal, which is installed in the car for receiving remote orders from the mobile...

The tensile fatigue property of steel fiber reinforced concrete (SFRC) was studied. In an axial tensile fatigue experiment, 52 prismatic specimens were tested under various stress conditions. A significant increase is found in the fatigue life of SFRC comparing to that of ordinary concrete. The results...

At present, in the steel tube tower, all the diagonal members’ axial leads intersect on the main members’ axial leads which would always cause the large size of node plate. The existing theoretical analysis shows that negative eccentricity of node connection can decrease the size of node plate, reduce...

In the process of finite element analysis about space truss structure, the problem of plane node must be dealt with. Generally, there are four methods about plane node, void- rod element method, removal freedom method, adding virtual spring method, method of beam element. In this paper a new treatment...

This Ab initio density functional theory calculations have been used to study the properties of point defects for hexagonal close-packed (hcp) Dysprosium (Dy), e.g., the formation energies of self-interstitial atoms (SIAs), mon-vacancy, interstitial H atoms and interstitial He atoms. The results indicate...

Dynamic in-situ monitoring is one of the important measures to ensure the stability of high slope engineering. Combined with a practical project, and based on the analysis of data that have been collected about the deformation of slope surface and interior and the stress state of support structures,...

A new Lagrangian quadratic finite volume element method based on optimal stress points was presented for solving one-dimensional parabolic problem with trial and test spaces as the Lagrangian quadratic finite volume element space and the piecewise constant function space respectively. It is proved that...

The emergence of harmful gas will bring serious difficulties to the tunnel construction, improper handling can easily lead to accidents. In order to evaluate the possibility of harmful gas in the tunnel, the basic characteristics of harmful gas in tunnel are analyzed from three aspects, that is spatial...

In this paper, through the compressive test of three graded dam concrete, using the method of strain electric testing, recording the value of stress and strain synchronously. A new strain sensor which was designed and processed is proved that is cheap, convenient, and can be used widely.

Through test on flexural behavior of 2 CBF bar reinforced concrete simple-supported beams on three-point static loading until failure, the experiment researches and analyzes the differences of the crack distribution, the ultimate bearing capacity, the load-deflection relationship and the impact of crack...

The dynamic disturbance to the remaining surrounding rock mass of underground caverns produced by blasting excavation can not be ignored. Considering the rock mass damage induced by compression-shear stress in the zone near the blasthole, the KUS dynamic damage constitutive model was improved, and adding...

Fissures in the high stress mass of deep buried had a great influence on mechanical properties and wave velocity of rock mass. Based on similarity theory, Rock like materials simulated deep buried marble of Jinping-II Hydropower Station. Under different fracture and different confining pressure, the...

Photosynthetic characteristics of seedlings of Carallia brachiata, Ficus microcarpa and Phoebe zhennan were studied at 6°C low temperature stress using Artificial Climate Box. After continuous treatments of 0 d, 2 d, 4 d, 6 d and a recovery of 2 d in nature, the photosynthetic indexes of the seedlings...