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首页> 外文期刊>Bulletin of earthquake engineering >Using the discrete element method to assess the seismic vulnerability of aggregated masonry buildings
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Using the discrete element method to assess the seismic vulnerability of aggregated masonry buildings

机译：用离散元法评估砌体房屋的地震易损性

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摘要

The seismic vulnerability of masonry aggregates is assessed with an approach based on the discrete element method. In that purpose, a quasi-static push-over procedure has been developed, in which a load pattern, based on the building first mode of vibration, is applied to the studied structure. Using this approach, the magnitude of the horizontal load to be applied for the building to collapse is obtained after a short computation time, as well as a detailed description of the failure mechanism. These results can be useful, for instance, for identifying the weakness of a structure or for comparing quantitatively the vulnerability of different structures. The beneficial and negative effects on the seismic response of the aggregation are assessed by subjecting isolated and aggregated buildings to both in-plane and transverse loads. As observed by engineers during post-seismic field missions, the buildings at the extremities of the aggregate are more prone to damage, because, contrary to the buildings inside the aggregate, they are not efficiently braced by the neighboring structures.
机译：用基于离散元法的方法评估砌体骨料的地震脆弱性。为此，已经开发了准静态推覆程序，其中基于建筑物的第一振动模式的荷载模式被应用于所研究的结构。使用这种方法，在较短的计算时间后即可获得要用于建筑物倒塌的水平荷载的大小，并对破坏机理进行详细说明。这些结果对于例如确定结构的弱点或定量比较不同结构的弱点可能很有用。通过对孤立和聚集的建筑物施加平面和横向荷载，可以评估对聚集体地震响应的有利和不利影响。正如工程师在地震后实地考察中所观察到的那样，骨料末端的建筑物更容易受到损坏，因为与骨料内部的建筑物相反，它们没有被相邻结构有效支撑。

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