基于可靠性的非线性建筑物间地震冲击易损性评估方法

IF 2.2 4区 工程技术 Q2 ENGINEERING, CIVIL Structural Engineering and Mechanics Pub Date : 2021-01-01 DOI:10.12989/SEM.2021.77.1.019
Pei Liu, Hai-xin Zhu, Peng-Peng Fan, W. Yang
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引用次数: 1

摘要

现有的估计相邻建筑物发生地震冲击概率的方法没有考虑非线性行为或只适用于简单的集中质量体系。本文提出了一种基于子集模拟的非线性相邻建筑地震冲击易损性和风险评估方法,并将其应用于有限元模型中。该方法首先应用于相邻建筑物的弹塑性模型,这些建筑物在不同的结构参数下具有很大的动力特性。然后对相邻不同楼层框架结构的地震冲击脆弱性和风险进行了评估,特别注意在有限元模型中建模非线性材料行为。确定了自然周期和冲击位置的差异同时影响冲击脆性。还确定了最小代码规定的分离距离的可靠性级别。此外,将增量动力分析方法扩展到相邻框架结构的地震冲击易损性评估中,与所提出的方法相比,当分离距离大于规范规定的最小值时,其易损性估计值更高。
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A reliability-based fragility assessment method for seismic pounding between nonlinear buildings
Existing methods to estimate the probability of seismic pounding occurrence of adjacent buildings do not account for nonlinear behavior or only apply to simple lumped mass systems. The present study proposes an efficient method based on subset simulation for fragility and risk assessment of seismic pounding occurrence between nonlinear adjacent buildings neglecting pounding effects with application to finite element models. The proposed method is first applied to adjacent buildings modeled as elastoplastic systems with substantially different dynamic properties for different structural parameters. Seismic pounding fragility and risk of adjacent frame structures with different floor levels is then assessed, paying special attention to modeling the non-linear material behavior in finite element models. Difference in natural periods and impact location are identified to affect the pounding fragility simultaneously. The reliability levels of the minimum code-specified separation distances are also determined. In addition, the incremental dynamic analysis method is extended to assess seismic pounding fragility of the adjacent frame structures, resulting in higher fragility estimates for separation distances larger than the minimum code-specified ones in comparison with the proposed method.
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来源期刊
Structural Engineering and Mechanics
Structural Engineering and Mechanics 工程技术-工程:机械
CiteScore
3.80
自引率
18.20%
发文量
0
审稿时长
11 months
期刊介绍: The STRUCTURAL ENGINEERING AND MECHANICS, An International Journal, aims at: providing a major publication channel for structural engineering, wider distribution at more affordable subscription rates; faster reviewing and publication for manuscripts submitted; and a broad scope for wider participation. The main subject of the Journal is structural engineering concerned with aspects of mechanics. Areas covered by the Journal include: - Structural Mechanics - Design of Civil, Building and Mechanical Structures - Structural Optimization and Controls - Structural Safety and Reliability - New Structural Materials and Applications - Effects of Wind, Earthquake and Wave Loadings on Structures - Fluid-Structure and Soil-Structure Interactions - AI Application and Expert Systems in Structural Engineering. Submission of papers from practicing engineers is particularly encouraged.
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