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  曲哲,叶列平.“破坏-安全”结构抗震理念及其应用[J].震灾防御技术,2009,4(3):241-255, DOI:10.11899/zzfy20090301.

“破坏-安全”结构抗震理念及其应用
摘要:    目前我国房屋建筑抗震采用的以小震弹性计算为基础的设计方法,使工程师忽视了对建筑结构在强烈地震作用下破坏模式的充分考虑与设计,使得建筑结构的大震安全性有时难以得到保证。“破坏-安全”抗震理念,以房屋建筑最重要的抗震安全性能为目标,要求设计人员对结构的预期破坏模式有充分的把握和控制,使结构在强烈地震作用下能够形成明确的预期破坏模式并具备一定的耗能能力,从而以经济的代价保证结构其余部分在强烈地震作用下的安全。本文结合我国汶川地震灾后恢复重建与加固改造的实际情况,介绍了“破坏-安全”抗震理念及其设计概念,并介绍了国内外研究人员与工程师在实现“破坏-安全”抗震理念方面所提出的创新抗震结构体系及其研究成果。希望“破坏-安全”这一抗震理念及其相关技术能够在我国广大的经济欠发达地区的抗震设计实践中得到推广,以全面提高我国经济欠发达地区房屋建筑的抗震安全性。
作者单位
曲哲 清华大学土木工程系教育部结构工程与振动重点实验室北京 100084 
叶列平 清华大学土木工程系教育部结构工程与振动重点实验室北京 100084 
关  键  词:房屋建筑  结构体系  破坏-安全  破坏模式  耗能
DOI:10.11899/zzfy20090301
基金项目:国家自然科学基金重大研究计划重点项目(90815025)、建设部专题项目资助
收稿日期:2009-04-16
作者简介:曲哲,男,生于1983年。博士研究生。主要研究方向:基于损伤控制的建筑结构抗震设计。E-mail:qz@mails.tsinghua.edu.cn
通讯作者:
“Fail-safe” Concept in Seismic Design and Its Applications
Abstract:      The current design method in anti-seismic design code takes the structural elastic response subjected to minor earthquakes as the basis for structural design. This makes engineers tend not to pay enough attention to designing and controlling the structural failure mechanism under rare earthquakes. Thus, the seismic safety of building structures subjected to rare earthquakes is not always guaranteed. The “fail-safe” concept in anti-seismic design aims at the seismic safety, which is considered as the most important seismic performance of building structures. This concept requires engineers to fully understand damage and failure behavior of the structure to be designed. The structure under this new concept is expected to hold adequate energy-dissipating capacity and is able to survive from rare earthquakes with acceptable cost. Focusing on the rehabilitation of Wenchuan MS8.0 earthquake, the basic concepts, as well as some recent development and application of the fail-safe design are introduced. The “fail-safe” design is believed to be an effective and economical solution for improving the seismic safety of the building structures all over China and to be especially valuable for the under development regions.
Keywords:  Building structure  Structural system  Fail-safe  Failure mechanism  Energy dissipation
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