Abstract

Strengthened masonry buildings are one of the most common types of old structure usually located in the ancient Algerian urban nuclei. The present study focused on common strengthened masonry buildings. Feedback from seismic experiments has shown that their dynamic behavior is generally nonlinear and highly vulnerable to earthquakes. Also, in order to predict the rate of damage that could occur to this type of structure in the event of earthquakes, empirical fragility curves based on a probabilistic method have been developed. In this study, seismic fragility analysis has been performed using the vulnerability index and the average damage rate. The vulnerability index will belong to one of three vulnerability classes determined by nonlinear dynamic analysis. The average damage is obtained using a deterministic method taking into account the vulnerability index and the seismic intensity. The fragility curves, which give the probability of achieving or exceeding a certain damage level for the three classes of vulnerability considered, have been compared to different studies that developed similar analyses. A seismic scenario was performed using a geographic information system and applied to strengthened masonry buildings located in Algiers city, which was built before the first Algerian seismic regulations of 1981.

摘要

加固的砖石建筑是最常见的旧结构类型之一，通常位于古代阿尔及利亚城市核心。本研究的重点是常见的加固砌体建筑。地震实验的反馈表明，它们的动态行为通常是非线性的，并且非常容易受到地震的影响。此外，为了预测地震时此类结构可能发生的损坏率，已经开发了基于概率方法的经验脆弱性曲线。在本研究中，使用易损性指数和平均破坏率进行了地震脆弱性分析。脆弱性指数将属于非线性动态分析确定的三个脆弱性类别之一。平均损伤是使用确定性方法获得的，考虑到易损性指数和地震烈度。脆弱性曲线给出了所考虑的三类脆弱性达到或超过一定损害水平的概率，已与开发类似分析的不同研究进行了比较。使用地理信息系统执行地震场景，并将其应用于位于阿尔及尔市的加固砌体建筑，该建筑建于 1981 年阿尔及利亚第一个地震法规之前。