砌体结构地震风险控制决策方法研究
Decision-making method of seismic risk control for masonry structures
张永群 1王卓琳 2兰成明 3蒋利学 2张东波 2冷予冰2
作者信息
- 1. 中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨 150080;上海市建筑科学研究院有限公司上海市工程结构安全重点实验室,上海 200032
- 2. 上海市建筑科学研究院有限公司上海市工程结构安全重点实验室,上海 200032
- 3. 北京科技大学土木与资源工程学院,北京 100083
- 折叠
摘要
地震等自然灾害作用下生命安全风险的相关决策会对社会公共安全产生重大的影响,因此,工程结构应将风险限制在合理可接受水平,在经济投资、使用效益和生命安全保护方面达到综合最佳.为了解决"多安全才足够安全"这个问题,首先,根据我国2018年基本国情和经济水平确定生活质量指数(life quality index,LQI),并建立基于LQI的风险可接受准则;其次,对新建砌体结构和加固既有砌体结构进行可靠度分析,采用蒙特卡罗法计算地震作用下砌体结构的失效概率;最后,建立砌体结构的地震风险控制决策方法,并通过实例应用提出新建砌体结构的最优设计方案和加固既有砌体结构的最佳加固策略.结果表明:文中提出的方法对新建砌体结构可靠度指标的要求与规范要求基本吻合;地震作用下多层砌体结构的可接受失效概率为0.001-0.010.
Abstract
Decisions related to life safety risk management under natural disasters such as earthquakes may have a significant impact on social and public safety.Therefore,the risk of engineering structure should be limited to a reasonable and acceptable level,so as to achieve the comprehensive best in terms of economic investment,use benefit and life safety protection.To answer the question"How safe is safe enough?",the life quality index(LQI)is firstly determined according to basic national conditions and economic level of China in 2018,and establishes the LQI-based risk acceptance criteria.Secondly,the reliability of new masonry structures and strengthened masonry structures are analyzed,and the failure probability of masonry structures under earthquakes is calculated by Monte Carlo method.Finally,the seismic risk control decision-making method of masonry structures is established,and two examples are given to illustrate the optimal design scheme of new masonry structures and the optimal strengthened strategy of existing masonry structures.The results show that the requirements of the proposed method for the reliability index of the new masonry structure are basically consistent with the provisions of codes,and the acceptable failure probability of masonry structures subjected to earthquake is between 0.001 and 0.010.
关键词
砌体结构/可靠度/生活质量指数/失效概率/风险可接受准则Key words
masonry structure/reliability/life quality index/failure probability/risk acceptance criteria引用本文复制引用
基金项目
中国地震局工程力学研究所基本科研业务费专项资助项目(2021D30)
上海市科学技术委员会科研计划项目(22dz1201400)
上海市自然科学基金项目(21ZR1455000)
出版年
2024
NETL
NSTL
万方数据