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Generation of Damaging Responses of a Reinforced Concrete Building Structural System Obtained When Subjected to Intense Seismic Action

强烈地震作用下钢筋混凝土建筑结构体系破坏响应的产生

基本信息

批准号：
14550563
负责人：
KUBO Tetsuo
金额：
$ 1.79万
依托单位：
The University of Tokyo (2003-2004)Nagoya Institute of Technology (2002)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Generation of damaging responses of a structural system obtained when subjected to intense seismic action has been examined and discussed. Herein the study, employing a numerical simulation, the inelastic responses of a reinforced concrete building is examined obtained when subjected to intense seismic action. Analytical parameters such as those of fundamental periods of structure, failure mode of structure are taken in the analysis. Emphasis is focused upon the correlation of inelastic responses that can produce damages for the building system with the energies dissipated within the system during the responses.A set of twenty synthetic strong ground motions are produced. Energies dissipated within the building system are evaluated associated with the critical responses of the system. Evaluated are the total sum of energies dissipated within the system, the energy dissipated by the inelastic hysteresis rule, that by the inelastic hysteresis rule when the response is produced greater than those ever produced, and that by the inelastic hysteresis rule when the response falls in the value less than those ever produced.Summarized are the major results of the research as follows :1.The inelastic responses of the system are highly correlated with the energies dissipated by the hysteresis rule. It leads to a conclusive remark that one can estimate the inelastic response by prescribing the energy dissipated within the system.2.The energies dissipated within the system during the responses when subjected to intense ground motions have been shared by the energy dissipated by the inelastic hysteresis rule of inelastic responses.3.For a building system with shear failure mode with an inferior dissipating energy capacity, the correlation of hysteresis dissipating energy to inelastic responses is found close, while for that with flexural failure mode with a superior dissipating energy capacity, the correlation is less close.

本文研究和讨论了结构体系在强烈地震作用下的破坏反应。本文采用数值模拟的方法，研究了钢筋混凝土结构在强烈地震作用下的弹塑性反应。分析中采用了结构基本周期、结构破坏模式等分析参数。重点研究了引起建筑物破坏的非弹性反应与反应过程中系统能量耗散之间的关系，生成了20组合成强地震动。建筑系统内的能量耗散与系统的临界响应相关联进行评估。计算了系统内耗散的能量之和，即由非弹性滞回规则耗散的能量，当产生的响应大于产生的响应时由非弹性滞回规则耗散的能量，以及当响应小于产生的响应时由非弹性滞回规则耗散的能量。1.系统的非弹性响应与滞回耗能密切相关。2.在强地震动作用下，结构体系在地震反应过程中所耗散的能量已经被非弹性反应的滞回耗能所分担; 3.对于耗能能力较差的剪切破坏结构体系，在地震反应过程中，结构体系的耗能能力与结构体系的耗能能力基本一致，结构体系的耗能能力与结构体系的耗能能力基本一致，结构体系的耗能能力与结构体系的耗能能力基本一致。滞回耗能与弹塑性反应的相关性较好，而对于耗能能力上级的弯曲破坏模式，滞回耗能与弹塑性反应的相关性较差。