基于可恢复指标的结构损伤机制评价方法

发布时间：2018-01-05 12:37

本文关键词：基于可恢复指标的结构损伤机制评价方法　出处：《浙江大学学报(工学版)》2017年11期 　论文类型：期刊论文

【摘要】：为了对基于性能的结构抗震设计提供决策依据,提出可恢复指标对结构不同损伤机制的安全、经济和可恢复性进行对比评价.以体系恢复力(resilience of system)为基础,阐述给定烈度区下单体结构可恢复指标的计算方法和流程;对5种典型损伤机制的RC框架结构,进行易损性分析和恢复力参数计算,得到结构可恢复指标;分析可恢复指标对各主要恢复力参数的敏感性,提出修正的给定烈度区下结构可恢复指标计算方法.结果表明:可恢复指标能够较全面地涵盖结构地震损失相关因素,体现结构的恢复力(即安全、经济和可恢复性);修正的结构可恢复指标能够较好地区分各损伤机制的恢复力,符合已有研究对各损伤机制优劣的定性判别.
[Abstract]:In order to provide a decision basis for performance-based seismic design of structures, a recoverable index is proposed for the safety of different damage mechanisms of structures. Comparative evaluation of economy and recoverability, based on system resilience of system. The calculation method and flow chart of recoverability index of single structure in given intensity range are described. For the RC frame structure with five typical damage mechanisms, the vulnerability analysis and the calculation of the restoring force parameters are carried out, and the recoverable index of the structure is obtained. The sensitivity of recoverable indexes to the main restoring force parameters was analyzed. A modified calculation method for structural recoverability index in given intensity region is proposed. The results show that the recoverable index can fully cover the factors related to structural earthquake loss and reflect the restoring force of structure (i.e. safety). Economy and recoverability; The modified structural recoverability index can better distinguish the resilience of each damage mechanism, which accords with the qualitative discrimination of each damage mechanism.
【作者单位】：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;重庆科技学院建筑工程学院;
【基金】：国家自然科学基金资助项目(51478068,51478067)
【分类号】：TU317
【正文快照】： 建筑结构允许发生一定程度的损伤和破坏以抵抗强震作用,大量震害表明,具有合理的损伤机制是结构实现预期抗震性能的关键[1].叶列平[2]基于结构系统的层次性原理,给出了预期结构抗震性能,进而提出了结构地震破坏机制和破坏过程的控制原理和可行方法;白久林等[3]综合考虑构件在

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