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Wang S.-R.,Chongqing Jiaotong University | Zhou Z.-X.,Chongqing Jiaotong University | Zhou Z.-X.,State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering | Gao Y.-M.,Chongqing Jiaotong University | Tang H.,Chongqing Jiaotong University
Jisuan Lixue Xuebao/Chinese Journal of Computational Mechanics | Year: 2015

This paper systematically described the segmental catenary theory and the basic equations of suspension bridge. The deformation stiffness iterative method calculating the main cable alignment was analyzed, which has been found that convergence problem may occur; therefore, an E-M method was put forward to calculate the precise main cable alignment of suspension bridge, namely on the basis of the equilibrium equation of main cable to derive the analytical relationship between the elevation of end point, middle point and the horizontal component H and vertical component V of the left end force of main cable, and the modified formulae of H and V considering the elevation error of end point and middle point. An example was introduced, results show that when the cable force is extremely uneven, E-M calculation method still can effectively make the alignment through three fixed points with and fast convergence speed and high precision. © 2015, Editorial Office of Chinese Journal of Computational Mechanics. All right reserved. Source


Wang S.,Chongqing Jiaotong University | Zhou Z.,Chongqing Jiaotong University | Zhou Z.,State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering | Gao Y.,Chongqing Jiaotong University | Huang Y.,Chongqing Jiaotong University
Mathematical Problems in Engineering | Year: 2015

The stiffening girder of self-anchored suspension bridge (SSB) is subjected to huge axial force because the main cable is directly anchored on the end of the stiffening girder. To obtain a simple model and accurately understand the mechanical behavior of the whole structure in preliminary design, this paper proposed an analytical calculation method considering the combined effects of the main cable-suspender-stiffening girder. On the basis of the deflection theory of the stiffening girder, the relation between the girder shape and the suspender force was explored. The relation between the main cable end force (MCEF) and the suspender force was derived through segmental catenary theory, and iteration method was further improved to avoid the divergence condition. Finally the solution was obtained through satisfying the compatibility condition. The proposed method does not need to iterate manually and can save calculation time. Examples are introduced to verify the applicability of this method, with the result that this method considers the combined effects of the main cable-suspender-stiffening girder, and the finished bridge state satisfies the minimum strain energy of the stiffening girder. Results also indicate that this method has fast convergence speed and high precision. © 2015 Shaorui Wang et al. Source


Zhou S.,State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering | Zhou S.,Chongqing Jiaotong University | Zhang M.,Chongqing Jiaotong University | Tian W.,Chongqing Jiaotong University | Xu J.,Chongqing Jiaotong University
Advanced Materials Research | Year: 2011

Taking deformation of the main arch under dead load as the arch alignment control target, the overall cable force and pre-camber of multi-rib arch were calculated by zero-order optimization method. According to the installation sequences of arch segments, taking deviation of cable tower, cables in one-time tensioning method and the section stress of arch chords as constraint conditions, the cable force and pre-camber for every segment were calculated by iterative method. This method is applied to the erection of a 400m steel truss arch bridge with three ribs, the calculated values of cable force are anastomosed with the measured ones, and the precision of arch alignment is high. © (2011) Trans Tech Publications, Switzerland. Source


Wang S.,Chongqing Jiaotong University | Zhou Z.,Chongqing Jiaotong University | Zhou Z.,State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering | Gao Y.,Chongqing Jiaotong University | Tang H.,Chongqing Jiaotong University
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

In most calculation methods for the reasonable finished bridge state of self-anchored suspension bridge, the combined action of cable-stiffening girder can not be considered in a single model, so repeated manual iteration or model boundary condition modification are usually adopted. For this reason, an analytical calculation method considering the combined action of cable-stiffening girder is proposed. Based on the stiffening girder deflection theory, the differential equilibrium equations, geometric equations, and the physical equations of the stiffening girder are used to derive the analytic relationship between the stiffening girder alignment and the suspender force. The end reaction force of the main cable is calculated from the suspender force using the segmental catenary theory. The solutions that meet the compatibility condition of the suspender force and the end reaction of the main cable is obtained by the iteration method. The calculation results by the proposed method agree well with the theoretical reasonable finished bridge state satisfying the principle of minimum potential energy of stiffening girder. The proposed method has the advantage of fast convergence speed and high precision that needed in practical engineering. ©, 2015, Tumu Gongcheng Xuebao/China Civil Engineering Journal. All right reserved. Source


Wu Z.,State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering | Wu Z.,Chongqing Jiaotong University | Jing S.,Key Laboratory of Bridge structure Engineering Ministry of Communications | Jing S.,Chongqing Jiaotong University | Liu J.,China CTDI Engineering Corporation
Advanced Materials Research | Year: 2012

In this paper, in combination with the specific conditions of light rail traffic volume, fatigue load spectrum parameters of light rail support are to be determined by background project light rail line 3 of Chongqing Caiyuanba Yangtze Bridge, through which the internal force history is then calculated. Three million constant amplitude fatigue loads that the test needs are finally determined through linear fatigue damage cumulative theory. © (2012) Trans Tech Publications, Switzerland. Source

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