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Wang L.,Guangdong Highway Design Institute Co. | Wang L.,Hunan University | Xu Y.,Tongji University
World Information on Earthquake Engineering | Year: 2015

In order to study the influence of a new type lateral steel damping device on the seismic performance of the cable-stayed bridge, a 1:20 scaled test model of Guangdong Rongjiang river Bridge was designed, constructed and tested on four shaking tables system. The results show that the fundamental frequency of the system with new type lateral steel damping devices is lower than that of transverse consolidation system. Compared to transverse consolidation system, the lateral steel damping device can reduce the peaks of structural displacement responses and acceleration responsesmore effectively. With increase of peak seismic acceleration, the damping effect is more obvious. It is proofed that the system with new type lateral steel damping device is reasonable. Therefore the appropriate lateral steel damping device may be chosen to improve the seismic performance of cable-stayed bridge. © 2015, Science Press. All right reserved. Source

Feng Z.-J.,Changan University | Wu Y.-L.,Changan University | Cheng C.,Changan University | Liu X.-F.,Guangdong Highway Design Institute Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

The characteristics of salt-dissolution and salt-heaving of plate-like saline soil are systematically studied on the basis of laboratory experiments. The results show that the plate-like saline soil is collapsible soil, and the coefficient of collapsibility increases with the increase of the salinity. The salt-heaving temperature is ahead of time as the sodium sulfate content increases, and finally the salt expansion force has a great increase. As the sodium sulfate content increases, the intensity salt-heaving range is closer to the intensity sodium sulfate precipitation range. The salt-heaving can be restricted by a certain load. All the above shows that in engineering practices of the plate-like saline soil, we must pay attention to the environmental characteristics and take some appropriate treatments. Source

Lin Y.,Guangdong Highway Design Institute Co. | Li B.,Guangdong University of Technology
Advanced Materials Research | Year: 2012

Using SBR and epoxy to modified warm-mix asphalt, the penetrability, ductility, softening point of bitumen at different aging times are tested, the comparative analysis of the modified effects of two modified agents to the asphalt mixture is made; Construction temperature of asphalt is determined by using temperature - porosity curve; The results reflect epoxy resin and SBR can improve the high temperature stability and anti moisture infringement capacity, so propose to use warm mix asphalt concrete for the top layer except in special sections layer. © (2012) Trans Tech Publications, Switzerland. Source

Wang M.-N.,Southwest Jiaotong University | Zhang X.-J.,Guangdong Highway Design Institute Co. | Gou M.-Z.,The Second Railway Survey and Design Institute | Cui G.-Y.,Southwest Jiaotong University
Yantu Lixue/Rock and Soil Mechanics | Year: 2012

It is difficult to simulate the whole process of shield tunneling and divide the overlapped shield tunnel. Combined with overlapped tunnel in Shenzhen Metro Hongling Zhonglu-Laojie-Shaibu interval to establish a more comprehensively 3D numerical simulation method, reflecting the characteristic of the whole tunneling process and divide shield tunnel from its horizontal direction on the basis of the index of Mohr-coulomb, longitudinal partition according to displacement rate of change. The results show that: the horizontal adjacent partition is: no-effect area when F≤Fα, weak-effect area when Fα Source

Li F.,Tongji University | Wu P.,Tongji University | Liu D.,Guangdong Highway Design Institute Co.
Steel and Composite Structures | Year: 2012

This paper presented a new aerial platform-AERORail for rail transport and its structure evolution based on the elastic stiffness of cable; through the analysis on the cable properties when the cable supported a small service load with high-tensile force, summarized the theoretical basis of the AERORail structure and the corresponding simplified analysis model. There were 60 groups of experiments for a single naked cable model under different tensile forces and different services loads, and 48 groups of experiments for the cable with rail combined structure model. The experimental results of deflection characteristics were compared with the theoretical values for these two types of structures under the same conditions. It proved that the results almost met the classical cable theory. The reason is that a small deflection was required when this structure was applied. After the tension increments tests with moving load, it is verified that the relationships between the structure stiffness and tension force and service load are simple. Before further research and applications are made, these results are necessary for the determination of the reasonable and economic tensile force, allowable service load for the special span length for this new platform. Copyright © 2012 Techno Press. Source

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