Micro-modelling of stone masonry template buildings as a strategy for seismic risk assessment in developing countries
Micro-modelling of stone masonry template buildings as a strategy for seismic risk assessment in developing countries
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DOI：
10.1016/j.engstruct.2022.114910
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发表时间：
2023-01
影响因子：
5.5
通讯作者：
Ted Cross;F. De Luca;Raffaele De Risi;G. Camata;M. Petracca
中科院分区：
文献类型：
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作者：
Ted Cross;F. De Luca;Raffaele De Risi;G. Camata;M. Petracca
非政府组织帕哈尔信托基金 (Pahar Trust) 开发的砌石模板健康中心的地震风险针对整个尼泊尔进行了评估，并考虑了该国可用的最新概率地震危险分析。 OpenSees 中的微观建模用于导出 Pahar Trust 健康中心的高保真模型，并执行云分析来导出脆弱性曲线。执行正则化标准以优化不规则砌石建模，并根据综合分析公式和最近的实验活动进行验证。该研究有助于建立一种策略，用于定义在高度可变的地震灾害中实施模板设计的情况下的隐含地震风险，对此可以将详细的数值研究应用于整个区域。鉴于低收入和中等收入国家砖石实验结果的可用性有限，并且对砖石构件进行单独的材料测试更容易获得，微模型代表了一种非常方便的方法。结果还与文献中针对同一国家背景进行的实证和数值研究进行了基准比较，由于建模策略的准确性较高，发现在脆弱性方面具有相对较好的匹配性和不太保守的结果。在质量控制保证结构细节严格实施的所有情况下，该卫生中心获得的风险评估结果与发达国家可接受的风险目标相当。
Seismic risk for a stone masonry template health centre developed by the NGO Pahar Trust is assessed for the entirety of Nepal, accounting for the latest probabilistic seismic hazard analysis available for the country. Micro-modelling in OpenSees is employed to derive a high-fidelity model of the Pahar Trust health centre and to perform a cloud analysis deriving fragility curves. Regularisation criteria are carried out to optimise irregular stone masonry modelling and validated against consolidated analytical formulations and recent experimental campaigns. The study contributes to establishing a strategy for defining the implicit seismic risk for the case of implementation of template designs in a highly variable seismic hazard for which a detailed numerical study can be applied to an entire region. Micro-modelling represents a very convenient approach given the limited availability in low and middle-income countries of experimental results for the masonry and the easier accessibility of separate material tests on the masonry components. Results are also benchmarked against empirical and numerical studies developed in the literature for the same country context finding a relatively good matching with a less conservative results in terms of vulnerability due to the higher accuracy of the modelling strategy. Risk assessment results obtained for the health centre are comparable to the acceptable risk targets for developed countries in all cases for which quality controls guarantee the rigorous implementation of structural details.