【摘要】 以一座实桥为工程背景,建立有限元模型进行自振频率及时程分析,研究横撑数量对钢箱提篮拱桥动力响应的影响。对计算结果进行对比分析得出:通过自振频率的分析,发现随着横撑数量的增加,实桥的面外刚度(横桥向刚度)有明显增大,同时面内刚度有微弱减小;经时程分析,减小地震响应的主要目标是控制此桥的横桥向位移,而采用7根横撑或是9根横撑将会非常明显地减小横桥向位移。更多还原

【Abstract】 To examine the influence of different number of rib crossbars on the seismic response of arch bridge,a specific X-style arch bridge is taken as a case project,and the finite element model is built to analyze the natural frequency and time history. Through contrastive analysis,the study finds that when the arch rib crossbars increases,the outer-plane stiffness shows an obvious increase and the inner-plane stiffness shows slight decreases. Through time history analysis,the main goal to reduce seismic response of the bridge is to control the transverse displacement,and the transverse displacement will be very obviously reduced if seven arch rib crossbars or nine arch rib crossbars are used.更多还原