摘要
运用有限元软件Midas Civil建立某高低墩连续刚构桥有限元模型,对地震作用下动力特性及不同设计参数下结构内力及变形响应规律进行分析。计算结果表明:在地震作用下,中跨跨中及墩顶的横桥向位移值均与桥墩高度成正比,桥墩高度增加在一定程度上会降低桥梁在横向地震动作用下的稳定性;桥梁高低墩比值越小,相同模态的频率越高,桥梁整体刚度越高。
A finite element model of a continuous rigid frame bridge with high and low pier is built by using finite element software Midas Civil,the dynamic characteristics under earthquakes effects and the structural internal force and deformation response law with different design parameters are analyzed. The results show that under earthquake effects,the transverse bridge displacement value at the mid-span and at the top of the pier is proportional to the height of the pier. Increasing the height of the pier will reduce the stability of the bridge to a certain extent under the effect of lateral ground vibration;the smaller the ratio of the bridge height to the low pier,the higher the frequency of the same mode,and the higher the overall stiffness of the bridge.
作者
叶映兰
Ye Yinglan(Guangdong Metallurgical and Architectural Design Institute Co.tLtd.y Guangzhou 510080,Guangdong)
出处
《工程建设》
2020年第7期35-38,53,共5页
Engineering Construction
关键词
连续刚构桥
高低墩
地震响应
整体刚度
有限元分析
continuous rigid frame bridge
high and low pier
earthquake response
overall stiffness
finite element analysis
