1. China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan Hubei 430050, China;
2. Xuzhou City Water Conservancy Bureau, Xuzhou Jiangsu 221000, China;
3. Research Institute of Highway, Ministry of Transport, Beijing 100088, China
Nonlinear Behavior of the Main Beams of Butterfly-shaped Arch Bridges and Its Influencing Factors
HUO Xue-jin1, SUN Yuan-bo2, HAN Li-zhong3
1. China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan Hubei 430050, China;
2. Xuzhou City Water Conservancy Bureau, Xuzhou Jiangsu 221000, China;
3. Research Institute of Highway, Ministry of Transport, Beijing 100088, China
摘要Given the unique pattern of butterfly-shaped arch bridges, the nonlinear behavior rules of the main girders are difficult to determined compared with those of ordinary arch bridges. The traditional design method that does not fully consider nonlinear influences is unsuitable for such investigation. The nonlinear behavior of the main girders was analyzed by considering various nonlinear factors using a self-compiled program. The influences and rules of different design parameters such as depression angle, rise/span ratio, steel ratio, and so on, were studied. The following results were obtained. (1) The beam-column effect of arch rib elements has unfavorable influences on the main beam moment, but the beam-column effect of the main beam elements can effectively prevent such unfavorable effects. (2) The nonlinear behavior rules of the main beam moment are more complicated than the rules of deformation. (3) The distance of the eccentric load has a significant effect on the influence coefficients of the boundary beams at the unloading side. (4) The influence coefficients of the mid-span deformation and moment increase as the depression angle increases. (5) The influence of the steel ratio and the angle between the cable plane and the arch plane on the nonlinear behavior of the main beams can be neglected.
Abstract：Given the unique pattern of butterfly-shaped arch bridges, the nonlinear behavior rules of the main girders are difficult to determined compared with those of ordinary arch bridges. The traditional design method that does not fully consider nonlinear influences is unsuitable for such investigation. The nonlinear behavior of the main girders was analyzed by considering various nonlinear factors using a self-compiled program. The influences and rules of different design parameters such as depression angle, rise/span ratio, steel ratio, and so on, were studied. The following results were obtained. (1) The beam-column effect of arch rib elements has unfavorable influences on the main beam moment, but the beam-column effect of the main beam elements can effectively prevent such unfavorable effects. (2) The nonlinear behavior rules of the main beam moment are more complicated than the rules of deformation. (3) The distance of the eccentric load has a significant effect on the influence coefficients of the boundary beams at the unloading side. (4) The influence coefficients of the mid-span deformation and moment increase as the depression angle increases. (5) The influence of the steel ratio and the angle between the cable plane and the arch plane on the nonlinear behavior of the main beams can be neglected.
基金资助:Supported by the National Natural Science Foundation of China (No.51138007);the National Science and Technology Support Program Funding (No.2011BAJ09B02)
通讯作者:
HUO Xue-jin, E-mail:huoxuejin@126.com
E-mail: huoxuejin@126.com
引用本文:
霍学晋, 孙远波, 韩立中. 蝶形拱桥主梁的非线性行为及影响因素分析[J]. Journal of Highway and Transportation Research and Development, 2015, 9(1): 24-34.
HUO Xue-jin, SUN Yuan-bo, HAN Li-zhong. Nonlinear Behavior of the Main Beams of Butterfly-shaped Arch Bridges and Its Influencing Factors. Journal of Highway and Transportation Research and Development, 2015, 9(1): 24-34.
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2015, Vol. 9 
