基于虚拟激励法的大跨度桥梁位移多目标等效静力风荷载  

Multi-target equivalent static wind loading of long-span bridges based on pseudo-excitation method and displacement responses

作　　者：董锐[1,2] 葛耀君[2] 杨詠昕[2] 

机构地区：[1]福州大学,福建福州350108 [2]同济大学,上海200092

出　　处：《土木工程学报》2014年第11期84-91,共8页China Civil Engineering Journal

基　　金：国家自然科学基金国际(地区)合作交流项目(51021140005);国家自然科学基金重大研究计划集成项目(91215302);国家重点基础研究973计划项目(2013CB036301)

摘　　要：等效静力风荷载是连接结构工程师与风工程师之间的纽带,在工程实践中起着非常重要的作用。以大跨度桥梁的抖振位移响应为等效目标,对其多目标等效静力风荷载进行了研究。首先,将准确高效的虚拟激励法引入等效静力风荷载的计算;然后,利用荷载-响应之间的关系,将大跨度桥梁抖振位移多目标等效静力风荷载表达为虚拟激励的形式,实现了基于虚拟激励法的大跨度桥梁抖振位移多目标等效静力风荷载计算,并赋予其明确的物理意义;最后,以东海大桥主航道桥为例,验证了该方法的正确性。Equivalent Static Wind loading （ESWL）, which connects important role in practical civil engineering projects. The multi-target structure engineers and wind engineers, plays an ESWL of long-span bridges based on the buffeting displacement responses is studied. Firstly, the accurate and efficient Pseudo-excitation method is introduced into the ESWL calculation of structures. Secondly, the multi-target ESWL of long-span bridges based on the buffeting displacement responses is expressed in the form of pseudo-excitations according to the load-response relationship which makes the multi-target ESWLs having clear physical meaning. Finally, the East sea cable-stayed bridge is used to verify the validity of the proposed method.

关 键 词：等效静力风荷载 虚拟激励法 抖振位移响应 多目标等效 大跨度桥梁 

分 类 号：TU311.3[建筑科学—结构工程] U441.2[建筑科学—桥梁与隧道工程]