天然地震与爆炸地震作用下网架结构动力响应及其隔震研究  

RESEARCH ON DYNAMIC RESPONSES AND SEISMIC ISOLATION OF A SPACE TRUSS STRUCTURE UNDER NATURAL SEISM AND EXPLOSION SEISM

作　　者：苗青 董晓鹏[1] 陈志华[1] 常利[2] 刘大亭[3] 孙秀莲 MIAO Qing DONG Xiaopeng CHEN Zhihua CHANG Li LIU Dating SUN Xiulian(School of Civil Engineering, Tianjin University, Tianjin 300072, China Tianjin Binhai Mass Transit Development Co. Ltd, Tianjin 300451, China China Railway 18th Bureau Group the 4th Engineering Co. Ltd, Tianjin 300350, China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津滨海快速交通发展有限公司,天津300451 [3]中铁十八局集团第四工程有限公司,天津300350

出　　处：《工业建筑》2017年第9期129-133,共5页Industrial Construction

基　　金：国家自然科学基金资助项目(51478310)

摘　　要：针对某网架结构,建立了非隔震、采用传统水平隔震支座和三维隔震支座的结构有限元模型,并分别对其进行自振特性分析和爆炸地震、天然地震输入下的时程分析,对比分析了各工况下结构的动力响应。结果表明:爆炸地震波具有频带宽、高频成分丰富和持时短的特点;天然地震作用下网架结构的位移和内力响应要远大于爆炸地震作用下的结构响应;采用水平隔震支座和三维隔震支座后明显延长了结构的自振周期,三维隔震支座对结构高阶振型周期的延长效果更加明显;相比水平隔震支座,三维隔震支座的隔震效果更好、通用性更强。The three finite element models were established for a space truss structure,which were non-isolated structure,traditional horizontal isolation structure and three-dimensional isolation structure. The natural vibration characteristics of the three models were analyzed. And the dynamic responses of the three models were compared under explosion seism and natural seism respectively. The results showed that the explosion seismic waves had the characteristics of wide frequency range, rich high-frequency contents and short duration. The responses of displacement and internal force of the space truss structure under natural seismic waves were larger than the structural responses under explosion seismic waves. The natural vibration period of the structure was obviously prolonged by using horizontal and three-dimensional isolation bearings and three-dimensional isolation bearings could more effectively prolong the natural vibration period of high order. Compared with the horizontal isolation bearing,the three-dimensional isolation bearing had better isolation effect and wider applicability.

关 键 词：爆炸地震 天然地震 网架结构 三维隔震 时程分析 

分 类 号：TU356[建筑科学—结构工程]