【作者】 郑毅；

【导师】 简政； 司建辉；

【作者基本信息】 西安理工大学 ， 结构工程， 2010， 硕士

【摘要】 基于性能的建筑抗震设计理论逐步被地震工程和工程抗震界所认同。该理论以结构的抗震性能分析为前提,考虑人和社会对于建筑的要求,使在遭受可能发生的地震作用下,总体费用最小化,这是设计理论上的一次飞跃。随着高层建筑在我国的迅速发展,建筑类型和功能多样性的追求,出现了大量平面不规则建筑。对于平面不规则结构,由于结构楼层中的质量和刚度等分布的不规则,造成楼层的质量中心和刚度中心不重合,从而使得在地震作用下结构各楼层受到的惯性力与楼层抗力不共线,结构将会在不同程度上表现为平动与扭转耦联的变形特征。在平面不规则结构当中,以性能作为设计变量,设计者可以控制结构在地震作用下的行为。所以,开展钢筋混凝土平面不规则结构基于性能的抗震设计研究是有重要理论意义和实用价值的。本文研究了平面平面不规则结构在地震作用下的结构响应,得到了结构的时程分析结果。针对文中两个算例的结构形式,分析了结构在多种水平侧向力分布形式下的结构响应。通过分析可知静力弹塑性(Pushover)分析方法应用于平面不规则结构会产生一定的误差。只要选择合适所分析结构的水平侧向力分布形式,就可以相应的减少误差。探讨了静力弹塑性(Pushover)分析方法在平面不规则结构中的应用。然后对平面不规则结构性能评估的能力谱方法进行了探索。能力谱方法的实质是：建立两条相同基准的谱线,一条是由基底剪力一顶点位移曲线转化的能力谱线,另一条是由加速度反应谱转化为的ADRS谱线(也称需求谱线),把两条线放在同一个图上,两曲线的交点定为目标位移或结构抗震性能点。将性能点所对应的顶点位移作为目标位移,得到了结构在多遇和罕遇地震下的响应。判断结构在不同地震作用下的层间位移变形是否满足规范要求；寻找结构的薄弱环节和薄弱部位,以确保该结构具有足够的抗震性能。更多还原

【Abstract】 Performance-based seismic design theory of structure was gradually recognized by the scholars of earthquake engineering and seismic engineering. Based on the seismic behavior analysis of structures, the theory takes consideration of the owners and society, make the overall cost minimization under the possible effect of the earthquake, this is a leap of the design theory.Following the fast development of high-rise, there have appeared a large of irregular buildings in pursuit of the type and function diversity. For the irregular-plane structure, the response of the structures will be translational as well as torsional because of the asymmetric-plan that caused by the irregular distribution of the mass and the stiffness so that the center of the inertia force and the resistant fore will be unlined.In the irregular-plane structure, the designer can control structural behavior following the earthquake effect by function as a variable. Therefore, making the examination about the study of the performance-based aseismic design theory of the reinforced concrete irregular-plane structure has important theory significance and practical value.The structural response of irregular-plane structure under seismic action was analyzed in this dissertation. To base on the two structures of this dissertation, it has been analyzed that the structure response under many kinds of horizontal side forces distribution. And we have known that nonlinear static analysis method (pushover) which is applied in the irregular-plane structure has certain error. The error can be reduced by choosing appropriate horizontal side force distribution. The capacity spectrum method of the irregularity plane structural performance is explored. The essence of the capacity spectrum method is to build two spectral lines which have the some criterion, one capacity spectral lines is changed from the base shearing force load-roof displacement curve, another spectrum called ADRS spectral lines or demand spectrum is changed from the criterion response spectrum. Put two lines on the same picture, the meeting point is called target displacement or structural seismic performance point. We take an apex displacement as target displacement which corresponds the performance point, and obtain the structural response under frequently occurred earthquakes and infrequently occurred earthquakes. Then we can judge whether the story drift satisfies the code requirement under different earthquake functions, and search the weak link and weak spot to make sure the structure has enough earthquake resistance performance.更多还原