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Zhang Y.,University Of Science And Technology Liaoning | Wang Y.,Liaoning Provincial Communication Planning and design Institute
Advanced Materials Research | Year: 2013

This paper uses the FLAC software to simulate self-settlement of high embankment. Analysis and discussion on the simulation results are performed. The final results indicate that the self-settlement of high embankment can't be ignored, the maximum settlement within the embankment occurs at about (1/3~1/2) embankment height. This conclusion has a reference value for guiding the actual construction. © (2013) Trans Tech Publications, Switzerland.

Zhang Y.,University Of Science And Technology Liaoning | Zhang Y.,Transport Management Institute Ministry | Wang Y.,Liaoning Provincial Communication Planning and Design Institute
Applied Mechanics and Materials | Year: 2013

In this paper, essential conceptions of ecological design and highway landscape are stated. The relationship between highway landscape design and ecological concepts is analysed. And the design example is used to discuss the expression of ecological concept in highway landscape design. © (2013) Trans Tech Publications, Switzerland.

Li Y.,Nanjing Southeast University | Liu Z.,Liaoning Provincial Communication Planning and Design Institute | Wang H.,Nanjing Southeast University | Xing L.,Nanjing Southeast University | Dong C.,Nanjing Southeast University
ICTE 2015 - Proceedings of the 5th International Conference on Transportation Engineering | Year: 2015

This paper introduces the systematic strategy of car-following (CF) models with three aspects. The general reality description is firstly used to analyze whether the CF models can describe the overall longitudinal driving behaviors really. Then the individual reality description is applied to analyze the ability of simulating individual behaviors precisely of diverse CF models. Finally, the inter-driver and intra-driver heterogeneity are analyzed for that good models can minimize the discreteness. In general, it is convenient for researcher to use the systematic strategy to evaluate the CF models. © ASCE.

Liu X.,Harbin Institute of Technology | Feng D.,Harbin Institute of Technology | Tang H.,Liaoning Provincial Communication Planning and Design Institute | Zhou C.,Harbin Institute of Technology | Li J.,Harbin Institute of Technology
Journal of Testing and Evaluation | Year: 2016

Bridge deck pavement layers are prone to bending fatigue and shear failure because of the continuous vibration, the vertical instant impact, and horizontal dynamic shear effect from vehicles onto the pavement system. To ensure the durability of pavement systems, a typical pavement system on a steel bridge was studied through numerical simulation and laboratory tests. The maximum tensile stress at the bottom layer and the maximum interlayer shear stress of bridge deck pavement were obtained under different loading conditions in numerical simulations. Then direct shear tests were conducted to study the fatigue characteristics of bridge deck pavement materials and structure. Finally, the fatigue resistance of the asphalt pavement system was investigated under the typical traffic level in the northeast of China. This study is helpful to design steel bridge deck pavement systems with good bending fatigue and shear resistance. © 2016 ASTM Int'l (all rights reserved).

Wu Z.,Southwest Jiaotong University | Qi T.,Southwest Jiaotong University | Zhong L.,Liaoning Provincial Communication Planning and Design Institute
Applied Mechanics and Materials | Year: 2011

The construction schemes of metro station driven with enlarging shield tunnels based on the shield tunnel in the upper and lower step method of artificial were first used in the dongshankou station of Guangzhou Metro Line VI and applied successfully in practice. This paper analyses and studies comprehensively the affection to the ground on the metro station driven with enlarging shield tunnels through numerical simulation. The study in this paper is mainly considered the ground settlement and movement when enlarging shield tunneling in the left tunnel. The ground settlement and movement up to a certain extent will affect the safety of the above adjacent buildings. This paper will provide some guidance to the application of this construction method in the future. © (2011) Trans Tech Publications.

Wu Z.,Southwest Jiaotong University | Qi T.,Southwest Jiaotong University | Zhong L.,Liaoning Provincial Communication Planning and design Institute
Applied Mechanics and Materials | Year: 2011

The vibration loads will be produced between wheel and rail on the running of the high-speed Train. The vibration energy will be transferred to the ground formation through the rail, guiding bed and tunnel lining structure, thereby causing vibration between the formation and surface and environmental interference effect problems. Thus the research of related issues caused by the high-speed train vibration has the vital great significance. The train design speed of the Shiziyang shield tunnel for Guangzhou-Shenzhen-Hong Kong passenger dedicated line is up to 350km/h. in this paper the research object is located in the segment of the homogeneous formation of the Shiziyang shield tunnel. The analysis of this paper includes the dynamic response rules of the shield tunnel and formation under the single high-speed train loads and the law of the pore water pressure accumulation and dispersion under train cyclic loading. © (2011) Trans Tech Publications.

Wang L.,Dalian University of Technology | Han J.,Liaoning Provincial Communication Planning and Design Institute | Song Y.,Dalian University of Technology
Smart Structures and Systems | Year: 2014

When subjected to fatigue loading, the main failure mode of partially prestressed concrete (PPC) structure is the fatigue fracture of tensile reinforcement. Therefore, monitoring and evaluation of the steel stresses/strains in the structure are essential issues for structural design and healthy assessment. The current study experimentally investigates the possibility of using fiber Bragg grating (FBG) sensors to measure the steel strains in PPC beams in the process of fatigue loading. Six full-scale post-tensioned PPC beams were exposed to fatigue loading. Within the beams, the FBG and resistance strain gauge (RSG) sensors were independently bonded onto the surface of tensile reinforcements. A good agreement was found between the recorded results from the two different sensors. Moreover, FBG sensors show relatively good resistance to fatigue loading compared with RSG sensors, indicating that FBG sensors possess the capability for long-term health monitoring of the tensile reinforcement in PPC structures. Apart from the above findings, it can also be found that during the fatigue loading, there is stress redistribution between prestressed and non-prestressed reinforcements, and the residual strain emerges in the non-prestressed reinforcement. This phenomenon can bring about an increase of the steel stress in the non-prestressed reinforcement. Copyright © 2014 Techno-Press, Ltd.

Li M.,Northeastern University China | Zhu F.-S.,Northeastern University China | Zhao Y.-P.,Liaoning Provincial Communication Planning and Design Institute
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2014

Theoretical analysis of CFRP reinforced concrete bridge fatigue crack propagation rate was conducted on the basis of linear progressive superimposed assumption. On the basis of crack propagation model expression and the analysis of the relationship between the three point bending beam stress intensity factor and the equivalent crack length, the crack growth rate was calculated to estimate the fatigue life of CFRP reinforced bridge. At the same time, experiment study was made on the fatigue crack propagation of the CFRP reinforced bridge, and the strain accumulation of the reinforced beams by single and double CFRP layer along the CFRP direction was analyzed to expound the growth rate and propagation behavior of the reinforced beam crack under load. The results show that CFRP plays an important role in the anti-fatigue for reinforced beam under fatigue load. The fatigue life estimation theory is proved to have smaller error which meets the actual demand of the CFRP reinforced concrete bridge through comparing theoretical calculation results with the test results. ©, 2014, Xi'an Highway University. All right reserved.

Zhang G.-H.,Tongji University | Zhang G.-H.,Liaoning Provincial Communication Planning and Design Institute | Zhao L.,Tongji University | Ge Y.-J.,Tongji University
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2012

The simultaneous measurement of wind load pressures on a streamline closed box girder's cross-section was conducted with pressure scanning valves in Tongji University wind tunnel, the spatial distribution states of wind load were compared, the reasons for the phenomena were explored, under different wind average speed, turbulence intensity, wind attack angle and span-wise distance. The spatial correlation between wind speed and its load effect was studied in both time domain and frequency one. With correlation coefficient and coherence function, the mechanism and influence factors were analyzed. It was elaborated and confirmed that the span-wise correlations of lift force and torsion moment are much greater than those of wind speed and drag force, and there is a similar law to the correlation of lift force and that of torsion moment, a similar law to the correlation of wind speed and that of drag force. The shortcomings of the traditional random aerodynamic buffeting theory were verified.

Jun L.,Northeastern University China | Zhang G.H.,Liaoning Provincial Communication Planning and Design Institute
Applied Mechanics and Materials | Year: 2014

ABAQUS finite element analysis software and load - structure method are adapted in this paper and the structure is simplified as a two-dimensional plane model. 25 kinds of working condition including five hole sizes: 0.6m, 1.2m, 1.5m, 1.8m, 2.1m and five hole positions varying from vault to arch springing are studied and the safety factor distribution of lining are obtained. By comparing the safety factor at dangerous section in lining with hole to that in no damage lining, a convenient evaluation method about the effect of hole to lining safety is proposed. © (2014) Trans Tech Publications, Switzerland.

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