In order to evaluate thermal effects on bridge pylons in extreme weather in Hengduan Mountain region of western China, a method was applied to a long span suspension bridge that the characteristics of the temperature field and temperature stress of the bridge pylon were analyzed, and two anti-crack ...

In order to study the influence of artificial crust layer formed by in-situ solidified on the pile-soil stress ratio of prestressed pipe pile composite foundation, field experiments and numerical simulation analysis were carried out based on the mud pit section of Qianqing-Binhai highway in Shaoxing...

In order to study the relationship among the fire exposure time, the content of coarse aggregate, and the macroscopic damage of tunnel lining concrete, a thermo-mechanical coupling test device of lining concrete was independently improved according to the actual fire exposure characteristics of tunn...

Detecting tunnel surface cracks has been one of the important tasks for subway operators. To achieve the automatic detection of tunnel cracks, this paper proposed an automatic labeling and recognition algorithm for tunnel crack samples, which combined crack feature extraction with deep learning. The...

Box-shape profiled steel sheet is usually used as the bearing element, with external claddings and spacers together, they constitute a double-layer profiled steel sheet wall system. In order to study the influence of external cladding and spacers on the flexural behavior of box-shape profiled steel ...

In order to study the effects of freak wave parameters on the wave force of a new dumbbell-shaped bridge structure, a series of wave flume model tests were conducted. Firstly, the influences of peak frequency, frequency bandwidth and focusing position on wave elevation time history and wave crest ar...

In order to investigate the response relationship between the gas explosion mechanism and parameters such as water depth, inlet pressure, inlet volume, and connected area of dry/wet areas, a 1∶50 scale hydraulic model test system was first conducted to observe the gas explosion jetting process and a...

In order to provide a scientific basis for water seepage control and later protection research of Leshan Giant Buddha, this study conducts quantitative monitoring and sampling of water seepage and atmospheric precipitation of Leshan Giant Buddha for the first time, analyzes the source and characteri...

In order to reflect the whole process of stress-strain of rock subjected to freeze thawing in the cold region under external force, this paper uses the theory of statistical damage mechanics and assumes that the strength of rock microelements obeys Weibull distribution. Then, according to the maximu...

To accurately predict the propagation of elastic waves in rails and explore the necessity of considering the bending-torsional coupling (BTC) of Timoshenko beam, a rail-fastener spatial infinite model considering the BTC of the beam was developed based on the spectral element method (SEM) and the sy...

In order to describe the damage evolution process of layered rock mass more truly and accurately, a damage constitutive model for layered rock mass considering the residual strength was established, which adopted modified Lemaitre strain equivalence hypothesis, combining the elastic theory of transv...

In order to guide the shield tunneling control and crack prevention design of segmental lining during the construction of subway section tunnels, a numerical model of the fabricated lining structure of shield tunnels considering joints and segments was established. Based on the constitutive model of...

In order to study the durability of high-performance concrete (HPC) bridges in the marine environment, based on the rapid indoor freeze-thaw test of concrete, the durability of HPC under the coupled action of chloride salt erosion and freeze-thaw cycles was tested, and the mass loss rate and relativ...

In order to investigate the heterogeneous traffic flow characteristics formed by the combination of connected autonomous vehicles (CAVs) and human-pilot vehicles (HPVs), as well as the impact of bus driving behavior on this environment, four following modes in heterogeneous traffic flow are initiall...

When pedestrians move on the slope, their force condition, speed, and mental states are different from those on the flat road, so it is difficult to apply the existing social force model for effective simulation. Therefore, the social force model was improved by considering the movement characterist...

To reduce the carbon emissions from logistics vehicles, this paper presented a two-echelon location routing problem (2E-LRP) model aiming at minimizing carbon emissions based on a carbon emission calculation method employing emission factors as the key parameter. The paper also designed a two-stage...

To calculate passenger flow distribution in urban rail transits, a passenger flow assignment method based on inference of passenger spatiotemporal path is proposed with the data collected from the automatic fare collection (AFC) and train timetables. Firstly, the passenger travel time parameters are...

Most of power allocation algorithms are based on ideal channel state information (CSI) to achieve performance optimization, which is not applicable in train-to-train (T2T) dual mobile terminal communication. For the hybrid network scenario of T2T and train-to-ground (T2G) in urban rail transit syste...

In order to solve the problem of misoperation of catenary and traction cables in a new continuous cable power supply system using the existing sectional protection scheme, firstly, the mechanism of load current on current longitudinal differential protection of the catenary was studied, and a fault ...

The bidirectional converter device can effectively inhibit the fluctuation of the DC-side grid voltage at traction substation, reduce the current transmitted between regions, and limit the rail potential. As the collaborative control strategy of the bidirectional converter and rectifier unit will di...

In order to restrain the galloping amplitude of the positive feeder in the gale area of the Lanzhou‒Urumuqi high-speed railway and ensure the safe operation of the train, firstly, a novel type of low-wind-pressure catenary positive feeder was designed, and the aerodynamic parameters and galloping am...

In view of the corrosion detection of large thin-walled structural parts in industrial equipment, a corrosion detection method based on spectral coherence analysis using high-order Lamb waves was proposed. Firstly, the A1 mode Lamb wave with a frequency slightly higher than the cutoff frequency was ...

In order to better perform the aerodynamic noise reduction design of high-speed trains, a 6-parametric model of the first bogie section of the high-speed train head car was established. The method designed by computational aeroacoustics and Latin hypercube sampling experiments was used, and the far-...

In recent years, the construction of intelligent monitoring equipment along railways and the environmental regeneration of new energy in the field of rail transit have attracted extensive attention. The basic principle of new energy regeneration technology is to capture clean environmental energy an...

In order to improve the visual representation and presentation of regional culture in the exterior design of urban rail vehicles, an optimization method of regional cultural factors for the exterior design of urban rail vehicles is proposed. Firstly, the influence evaluation system of regional cultu...