【摘要】 以甘肃省兰州市某钢箱系杆拱桥为工程背景,研究了拱肋横撑的布置位置和刚度对钢箱系杆拱桥在地震动作用下地震响应的影响。利用大型有限元软件MIDAS/Civil建立数值模型,模拟计算出拱桥上选定的节点在横向、纵向和竖向三个方向的地震波作用下的地震响应,包括各节点的位移和正应力。结果表明,随着拱肋横撑的布置位置和刚度的变化,拱桥的地震响应发生有规律的变化,这对该类桥型的横撑设计有一定的参考价值。更多还原

【Abstract】 On the basis of a steel box tied arch bridge in Lanzhou.the effects of the arrangement position and stiffness of the lateral braces on seismic response of the bridge were discussed.The finite element software MIDAS/Civil was adopted to establish a numerical model and simulate the seismic response of selected nodes of the bridge.including displacement and normal stress.under the action of transverse.longitudinal and vertical seismic wave.The results showed that seismic response of the bridge presented regular changes with the change of the arrangement position and stiffness of the two lateral braces.which was of much value to the design of lateral braces of the steel box tied arch bridge.更多还原