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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Performance evaluation and damage assessment of steel frame buildings under main shock-aftershock earthquake sequences
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Performance evaluation and damage assessment of steel frame buildings under main shock-aftershock earthquake sequences

机译：主震-余震地震序列下钢结构房屋的性能评估和破坏评估

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摘要

Structures subjected to earthquake ground motions may be subjected to one or more aftershocks within a short period following the occurrence of the principal earthquake shock. Strong aftershocks have the potential to cause extensive structural damage, property losses and injuries to building occupants. This paper investigates the potential for aftershocks to cause additional damage to steel moment frame buildings, and provides a probabilistic description of structural damage states prior to and following those aftershocks. Statistics of structural response and damage states for steel frame buildings subjected to main shock-aftershock sequences are calculated using the enhanced uncoupled modal response history analysis (EUMRHA) method, a modification of an efficient and accurate method for predicting nonlinear response of frames. The frame connections are modelled by a moment-rotation relationship that takes brittle fracture of the connection welds into account. Damage accumulation is analysed in terms of a normalized 'damage ratio' and maximum inter-storey drift. Simple probabilistic tools are proposed for purposes of rapid structural evaluation and condition assessment of damaged buildings.
机译：在发生主要地震冲击后的短时间内，经受地震地震动的结构可能会遭受一次或多次余震。强烈的余震有可能导致广泛的结构损坏，财产损失和建筑物居民伤害。本文研究了余震可能对钢制矩型框架建筑物造成额外破坏的可能性，并提供了对这些余震之前和之后的结构破坏状态的概率描述。使用增强的非耦合模态响应历史分析（EUMRHA）方法（主要用于预测框架非线性响应的一种有效且准确的方法的改进），计算遭受主冲击-余震序列的钢框架结构的结构响应和破坏状态的统计数据。框架连接通过力矩-旋转关系建模，该关系考虑了连接焊缝的脆性断裂。根据标准化的“损坏率”和最大的层间漂移来分析损坏的累积。为了快速进行结构评估和受损建筑物的状况评估，提出了简单的概率工具。

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