Application of spiral stirrups can obviously improve the axial bearing capacity and ductility of reinforced concrete (RC) columns. This paper aims to study the mechanical properties of rectangular short RC columns confined with five-spiral stirrups under axial compression and to present a calculatio...

In order to study the applicability of steel slag fine aggregate in concrete and the Axial compression constitutive model of steel slag concrete, the physical and chemical properties of steel slag fine aggregate were tested and the stability of steel slag fine aggregate was tested and analyzed. Six ...

In order to reveal the time-varying laws of the axial compressive strength, elastic modulus and splitting tensile strength of the pumped self-compacting concrete (SCC) in super high-rise buildings during the construction period, and to provide a basis for mechanical performance analysis of super hig...

The popular digital aggregate modeling technology has low efficiency and quality, with the parameters uncontrollable and not involving the shape, edges, texture and other geometric morphological parameters of the aggregate. Thus it is difficult to effectively study the effects of geometric-morpholog...

Basalt fiber reinforced polymer (BFRP) has the advantages of light weight, high strength and good durability. Using the material as anchor can effectively solve the corrosion problem of traditional steel bar anchor and has a broad application prospect in engineering construction in harsh environment...

Clay fines from subgrade would gradually intrude into the ballast layer under cyclic loadings of passing trains, which would reduce the bearing capacity and impede the free drainage of track beds. A series of large-scale direct shear tests were carried out to investigate the strength and deformation...

In order to improve the seismic safety of immersion joints, a new type of damping device for immersed tube tunnel joints was designed, and two groups of quasi-static tests were performed using a 1/4 scale shear key model with and without the damping device for comparative analysis. Through the test...

In order to improve the efficiency of the coupled train-bridge system reliability analysis, a train-bridge coupling vibration model is established, and the track irregularity is simulated by auto-regressive (AR) method. After basic principles of the (auto-regressive moving average exogenous (ARMAX)...

In order to improve the flutter performance of a long-span suspension bridge with a double-deck truss girder, the Yangsigang Yangtze River Bridge with a main span of 1700 m was taken as the engineering prototype to conduct section model wind tunnel tests, to study the effects of the upper central st...

Under the operation conditions of mixed passenger and freight railways as well as heavy haul railways, wheel/rail wear problem is particularly prominent. In order to slow down the growth of wheel/rail wear, the 60 kg/m rail profile is optimized. The objective function and constraint conditions are d...

The midpoint chord method can effectively control the track irregularity of the designated band that affects the driving safety and comfort. It is mainly used to measure the track static irregularity. However, its low measurement efficiency restricts the development of track ‘state-maintenance’. To ...

To investigate the influence of variable switch rail cross-sections on wheel-rail contact behaviors and the wear distribution of the curved switch rail, a three dimensional (3D) asymmetric contact geometry method for the turnout area was proposed, which could calculate the real normal gap between th...

In order to reasonably optimize and match the suspension parameters to improve the dynamic performance of high-speed locomotives, the pseudo-excitation method was used to calculate the lateral riding quality index in the frequency domain for a high-speed locomotive, and a collaborative multi-paramet...

The post-construction settlement prediction of loess high fill site is an important basis for determining the time sequence of construction and the spatial layout of ground engineering. In order to accurately predict the post-construction settlement of loess high fill site, two post-construction set...

To improve the initial density of a paving mixture behind the paver, the research of the dynamic characteristics of tamper is needed. In the impact compaction, the vibration shock force will impact mixture. A simulation model reflecting the relationship between paving material compactness and vibrat...

In order to study the influence of openings of door, window and roof on the tsunami force on low-rise houses, physical model experiments were conducted under different wave heights of tsunami bores which were generated by dam-break method. The influence mechanisms and rules of the opening rate and o...

Ethanol pool flame experiments disturbed with transverse low-frequency acoustic wave were carried out to understand the mechanism of acoustic fire suppression and flame dynamics under acoustic disturbance. The acoustic frequency range was 28–54 Hz, and the local acoustic pressure range at the flame ...

To reduce the time and economic costs of freight cableway path planning, according to factors such as geographical information, project requirements, and costs of cableway erection and operation, the requirements of cableway path planning are proposed, and the technical process of automatic path pla...

This study is aimed at risk assessments of railway schemes in moraine-dammed lake outburst risk areas in the southern Tibet Plateau. Based on the mechanism analysis of 74 outburst events in the study area, a multi-state Bayesian-Network prediction model is established considering the complex relatio...

Traditional route planning scheme cannot meet the increasing travel demand of travelers in the process of multimodal transportation. To provide personalized route planning scheme based on various travel demands of travelers, public transport timetable is simulated with the integrated circuit card da...

To make full use of the low-rank characteristics and local neighbor relationship of the traffic data, and accurately recover the missing data in traffic data acquisition system, firstly, the traffic data matrix is pre-interpolated by the low-rank matrix completion model based on kernel norm to obtai...

High-speed railway signal system is a key infrastructure to ensure the safety operation of trains. Once the equipment or system functional failure happens, it could easily lead to safety accidents. To this end, a fuzzy comprehensive evaluation method is proposed for risk assessment of the high-speed...

Multiple vehicle bus (MVB) is employed to transmit important train operation control instructions and monitoring information, and accurate diagnosis of the fault types of MVB network is the basis of the intelligent operation and maintenance system. To this end, a fault diagnosis method for MVB netwo...

Train on-board vision system is an important guarantee for the safety of future urban rail transit operations. The detection effect of the on-board vision system will be seriously affected by the low-light environment when the train operates in a closed environment or at night. To this end, a real-t...

With the continuous development in miniaturization, lightness, high efficiency and invisibility for shipboard integrated power systems, the energy storage component gradually become an important part of power systems. For the three-phase isolated inverter in the power distribution system, the challe...

In order to improve the ability of automated theorem provers, the premise selection task emerges. Due to the directional nature of formula graphs, most current graph neural networks can only update nodes in one direction, and cannot encode the order of sub-nodes in the formula graph. To address the ...

In order to study the influence of facility relationship on layout in corridor allocation problem, An integer programming model considering location and relationship constraints is constructed, and a hybrid clonal selection algorithm based on clonal selection algorithm is proposed to solve the prob...

As a key enabling technology for the cyber-physical fusion of intelligent manufacturing, the digital twin has drawn extensive concern. And how to build a digital twin model has become a current research hotspot. At present, digital twin models are mostly focused on conceptual abstraction or specific...