大跨度钢管混凝土拱桥行波效应及减震分析-现代结构理论专业论文.docx

lll l l l lime history reactions as the center，main tasks undertaken by this article are as follows. With Fujian Putian Kuokou Bridge as the example，a dynamic analysis model of the bridge is establisbed by employing 也e fmite element program ansys. And dynamic performance analysis and e缸由q国ke response analysis of lhe traveling wave effectiveness in differenl phase are lhen conducted. According to the features of F可ian Putian Kuokou Bridge，the arrangement plan of viscous dampers，the damping de飞往饵， is defmed，and by comparing the seismic responses of the bridge 悦fore and after installing the damping device，analysis of the damping effects of the viscous damp巳r on long span concrete-filled steel tubular arch bridge is performed. (3)灿alysis of the impacts made by parameters of the viscous damper and the location of it on damping effect is undertaken to provide reference for the damping design oflong-span concrete-filled steel tubular arch bridge. Key words: CFST arch bridge ，ansys. dynamic time history analysis ，traveling wave effect. di的rent phase difference ，vibralion reducing conlrol ，viscous damping coefficient 录口]曰第 1章绪论............ ........................….. ....…..................... ...............………….............… 录 口]曰 川 结构减震控制研究状况 .....…..……..………............………..…….........……......... 1 1.1.1 引言….. 1.1.2 被动控制..........…..…..…......…..….............. ........…..….......…..….....................2 1.1.3 主动控制、半主动控制及混合控制............……..……..........…........… .......4 1.2 桥梁结构抗震研究的现状与展望 ….......…......................….................................4 1.2.1 桥梁震害特点 ............…….......….......…….........…......................….......… .......4 1.2.2 桥梁结构抗震设计的历史回顾.........…… .................................................5 1.2.3 桥梁结构抗震设计的发展趋势….........…........……….......……........ ........6 1.3桥梁结构抗震控制.......................….........................…….....................…… ...........7 1.3.1 桥梁结构抗震控制的特点..............