选煤厂主厂房网架结构屋盖的抗震性能研究
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摘要
以某在役选煤厂主厂房屋盖的固定铰支座网架结构为研究对象,采用3D3S分析软件分析了组合荷载对网架结构抗震性能的影响.结果表明:两区网架结构动力特性相似,各网架结构的自振频率密集,结构的低阶整体振型以竖向振型为主,结构整体性强,局部振动不明显;在7度多遇地震作用下,结构的组合荷载作用的内力和位移响应属于同一量级,结构安全稳定性符合规范要求.
Existing pin-support space truss structures on the roof of main workshop of a coal preparation plant are regarded as research objects.Influence of combined loads on the earthquake response of space truss structure is analyzed by using the software 3D3S.The analysis results show that two parts of space truss structures are similar in dynamic property,frequencies of each space truss structure are dense and the first mode is almost in the vertical direction,structural integrity is strong and local vibration is not obvious;In the 7 seismic fortification intensity areas,the displacement and inner force responses of each structure under combined loads are close,the safety and stability properties of each structure are in line with the national regulation.
Existing pin-support space truss structures on the roof of main workshop of a coal preparation plant are regarded as research objects.Influence of combined loads on the earthquake response of space truss structure is analyzed by using the software 3D3S.The analysis results show that two parts of space truss structures are similar in dynamic property,frequencies of each space truss structure are dense and the first mode is almost in the vertical direction,structural integrity is strong and local vibration is not obvious;In the 7 seismic fortification intensity areas,the displacement and inner force responses of each structure under combined loads are close,the safety and stability properties of each structure are in line with the national regulation.
引文
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[9]丁北斗.基于环境激励网架结构的模态分析与损伤识别研究[D].徐州:中国矿业大学,2010.
[10]JGJ7-91网架结构设计与施工规程[S].北京:中国建筑工业出版社,1992.
[2]蓝天,张毅刚.大跨度屋盖结构抗震设计[M].北京:中国建筑工业出版社,2000.
[3]董石麟,罗尧治,赵阳,等.新型空间结构分析、设计与施工[M].北京:人民交通出版社,2006.
[4]高维成,于岩磊,攀久铭,等.斜拉网格结构的结构形式、应用及特性在国内的研究进展[J].振动与冲击,2010,29(1):128-132.
[5]刘善维,董继斌.空间结构在煤炭行业建筑中的应用[J].煤矿设计,1999(5):39-42.
[6]简洪平,刘光宗,蔡文豪,等.大跨度空间网架结构优化设计[J].有色冶金设计与研究,2001,22(4):33-41.
[7]郭晨喜.网架结构基于位移的抗震设计方法[D].北京:清华大学,2008.
[8]王金国,郭迅.大跨空间钢网架结构静力和动力性能实验研究[J].世界地震工程,2008,24(4):59-63.
[9]丁北斗.基于环境激励网架结构的模态分析与损伤识别研究[D].徐州:中国矿业大学,2010.
[10]JGJ7-91网架结构设计与施工规程[S].北京:中国建筑工业出版社,1992.
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