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首页> 外文期刊>Arabian Journal for Science and Engineering >Seismic Vulnerability Assessment of Existing Multi-Story Reinforced Concrete Buildings in Egypt
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Seismic Vulnerability Assessment of Existing Multi-Story Reinforced Concrete Buildings in Egypt

机译：埃及现有多层钢筋混凝土建筑的地震易损性评估

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Although seismic design codes are often subjected to improvements after each earthquake disaster, old constructions are left unprotected by new technology. The purpose of this paper is to promote public welfare and safety by reducing the risk of death or injury that may result from the effects of earthquakes on existing reinforced concrete (R/C) building stock in Egypt. It aims to evaluate seismic vulnerability of the most commonly used type of multi-story RC buildings. Special attention is placed upon examining R/C buildings with vertical irregularity. The seismic vulnerability assessment for existing R/C buildings is assessed through examining two types of damage indicators: damage index and inter-story drift limit state. A sample building set is selected to reflect existing construction practice including regular buildings and those with vertical irregularities. The effects of vertical irregularity at different floor levels are examined by developing fragility curves of medium-rise gravity load designed R/C buildings. Fragility curves of the investigated building set are determined by nonlinear time history analysis to evaluate the damage state. These curves are used to represent the probabilities that the structural damages, under various levels of seismic excitation, exceed specified damage states by means of earthquake intensity damage relations. The analytical damage evaluation in this study shows that the seismic effects of earthquakes experienced in Egypt may be significant. Moreover, it shows that some of the earthquakes may impose excessive displacement demands on the investigated buildings. The results also show that the irregular buildings are more vulnerable than the regular ones.
机译：尽管在每次地震灾难后通常都会对抗震设计规范进行改进，但旧建筑却不受新技术的保护。本文的目的是通过减少地震对埃及现有钢筋混凝土（R / C）建筑材料造成的死亡或伤害风险，从而促进公共福利和安全。它旨在评估最常用的多层RC建筑类型的地震脆弱性。特别注意检查具有垂直不规则性的R / C建筑物。现有的R / C建筑物的地震易损性评估通过检查两种类型的破坏指标进行评估：破坏指数和层间漂移极限状态。选择一个样本建筑集以反映现有的建筑实践，包括常规建筑和垂直不规则的建筑。通过绘制中层重力荷载设计的R / C建筑物的脆性曲线，研究了不同楼层水平垂直不规则的影响。通过非线性时程分析确定所研究建筑物的易碎性曲线，以评估破坏状态。这些曲线用于表示在各种地震激励水平下，结构破坏通过地震烈度破坏关系超过指定破坏状态的概率。这项研究中的分析性损害评估表明，埃及经历的地震的地震影响可能很大。此外，它表明某些地震可能会对被调查的建筑物施加过多的位移要求。结果还表明，不规则建筑物比常规建筑物更容易受到伤害。

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