索塔底部铰接管线悬索桥地震反应  

Seismic response of pipeline suspension bridge with the bottom of tower hinged

作　　者：张彬[1] 陈锦晶[1] 黄坤[2] 冯睿为 

机构地区：[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000 [2]西南交通大学土木工程学院,四川成都610031

出　　处：《辽宁工程技术大学学报（自然科学版）》2017年第9期944-948,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家安监总局资助项目(05-05-079);辽宁省教育厅一般项目(L2011048)

摘　　要：针对某带风缆且索塔底部铰接管线悬索跨越工程,输入三条频谱特性不同的地震波,采用时程分析法研究地震激励作用对管线悬索桥结构关键部位内力及位移的影响.研究结果表明:在加速度峰值相同但频谱特性不同的地震波激励下桥梁结构地震反应存在显著差异;由于塔底铰接,主缆内力在地震力作用下变化显著;管线弯曲内力在地震载荷作用下变化幅度较大,考虑到其特殊的使用性,在抗震设防时必须优先考虑管线结构的抗震能力.Taking a pipeline suspension bridge with the bottom of tower hinged as an example, three seismic waves with different spectrum characteristics are input to study the influence of seismic excitation effect on the internal force and displacement of the pipeline suspension bridge at structural critical details by adopting time-history method. The results indicate that there are significant difference in the seismic response of bridge under seismic waves excitation with the same peak acceleration and different spectrum characteristics. Because of the hinged bottom of tower, internal force of main cable changes remarkably, and the bending internal force of pipeline are with great variational amplitude under the seismic load. The seismic capacity should be considered firstly when make seismic fortification in view of its special use.

关 键 词：管线悬索桥 油气管线 风缆 地震激励 索塔铰接 地震反应 

分 类 号：U448.29[建筑科学—桥梁与隧道工程]