平面不规则高层RC框架结构抗扭设计分析与对策  

Torsion Analysis and Countermeasures for High-rise RC Frame Structures with Irregular Planes

作　　者：范存娟 赵植苹[1] 何悠[1] 

机构地区：[1]西南石油大学土木工程与建筑学院,成都610500

出　　处：《结构工程师》2014年第3期1-6,共6页Structural Engineers

摘　　要：扭转效应是平面不规则结构最明显的动力特性,对结构抗震非常不利。结构平面布置不对称和不规则引起的偏心、扭转周期比以及扭转位移比通常是控制建筑扭转效应的主要参数。以某L形框架教学楼结构平面布置为例,对水平地震作用下平面扭转不规则结构抗扭设计进行了分析与研究,结果表明,通过适当调整结构内外圈构件布置,可以满足规范对上述三个主要因素的要求,结构抗扭性能得到较明显改善。The torsion effect is one of most obvious characteristics for high-rise structures with irregular planes.It has an adverse influence on the anti-seismic capability of the structure.Factors such as the eccen-tricity caused by asymmetry and irregularity of structural plan layout,the torsional period ratio,and the tor-sional displacement ratio usually control the torsion effect.This paper analyzed a L-shaped frame structure with an irregular plane layout under horizontal seismic loads.The torsion design for this building was discussed. Results show that through appropriately adjusting the internal and external structural member arrangement,the torsion effect can be reduced to meet the requirements of the specification for the aforementioned three parameters.

关 键 词：平面不规则 扭转效应 扭转周期比 扭转位移比 偏心率 

分 类 号：TU973.3[建筑科学—结构工程]