【作者】 刘立平； 刘益舟； 李安亮； 吴存雄； 李英民；

【Author】 Liu Liping;Liu Yizhou;Li Anliang;Wucunxiong;Li Yingmin;School of Civil Engineering;Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University),Ministry of Education;China CMCU Engineering Corporation(CMCU);

【机构】 重庆大学土木工程学院； 山地城镇建设与新技术教育部重点实验室(重庆大学)； 中机中联工程有限公司；

【摘要】 基于位移的构件性能评价是结构性能评价的基础。掉层框架结构基础分阶嵌固使得接地层中各柱的约束存在差异,基于位移的构件性能评价指标在掉层框架结构抗震性能中的适用性有待研究。首先基于掉层框架结构特点,从理论上分析了材料应变、塑性转角、基于材料应变的构件位移角、广义剪切变形、有害层间位移角和层间位移角6种基于位移的构件性能评价指标的适用性;再利用perform-3D和sap2000有限元软件,建立典型掉层框架结构算例,对比分析了各评价指标的评价效果。研究表明,材料应变、塑性转角和基于材料应变的构件位移角能适用于掉层框架柱的抗震性能评价,而广义剪切变形、有害层间位移角和层间位移角难以真实反映掉层框架柱的破坏状态。更多还原

【Abstract】 Component-displacement-based evaluation is the basic of the structural performance evaluation.Due to the stepped-em bedded foundation of frame structures supported by stepped foundation,constraints conditions are different in columns of the ground layer.So it is necessary to study the applicability of component-displacement-based evaluation index of the structural performance-based seismic evaluation in frame structures supported by stepped foundation.First of all,based on the characteristics of frame structures supported by stepped foundation,analyse the applicability of six component-displacement-based evaluation indexes theoretically(i.e.material strain,plastic hinge,component drift based on material strain,generalized shear deformation,destructive story drift and interstory drift).Then use finite element analysis software SAP2000 and Perform-3D to set up a typical example of frame structures supported by stepped foundation,and then compare the effectiveness of each evaluation indexes.The research shows that material strain,plastic hinge,and component drift based on material strain are applicable to frame structure supported by stepped foundation.Generalized shear deformation,destructive story drift and interstory drift can’t reflect the truly damage states of the columns of frame structures supported by stepped foundation accurately.更多还原