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首页> 外文会议>To the eNZ of the Earth vol.2 >The Prediction of Damage to Masonry Houses Caused by Combined Foundation Movements and Seismic Disturbance
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The Prediction of Damage to Masonry Houses Caused by Combined Foundation Movements and Seismic Disturbance

机译：地基运动与地震干扰相结合对砌体房屋的破坏预测

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摘要

Cracking failure in masonry houses founded on expansive soils has been widely reported throughout Australia and other countries. The cost associated with such damage is significant. The current codes ofpractice only provide broad guidance on the design principles of masonry under ground movement, due to a lack of research in the area. In this paper a numerical model has been developed to study the behaviour of masonry walls under foundation movements as a result of expansive soils. The model is based on Distinct Element Method (DEM) which has been applied successfully by the authors to model the masonry walls under simulated in-plane earthquake forces. The model is capable of predicting the crack initiation, propagation and failure modes of masonry walls under various footing movements (doming or dishing curvatures). The numerical solutions obtained from the distinct element analysis are validated, by comparing them with results obtained from existing experiments. The results clearly show that increased damage is evident for the dishing case where the damage zone extends higher within the structure than for the domed case. The distinct element method is shown to have great potential for modelling multiple modes of ground displacement applicable to masonry structures.
机译：在澳大利亚和其他国家，已广泛报道了基于膨胀土壤的砖石房屋开裂的失败。与此类损坏相关的成本很高。由于该领域的研究不足，当前的操作规范仅对地面运动下的砌体设计原理提供了广泛的指导。本文建立了一个数值模型来研究膨胀土在基础运动下砌体墙的行为。该模型基于离散元方法（DEM），该方法已成功应用于作者在模拟面内地震力作用下对砌体墙进行建模的过程。该模型能够预测砌体墙在各种立足运动（拱形或凹陷弯曲）下的裂纹萌生，扩展和破坏模式。通过将它们与现有实验的结果进行比较，可以验证从独特元素分析获得的数值解。结果清楚地表明，对于碟形外壳而言，损坏的增加明显，其中损坏区域在结构内的延伸范围比拱形外壳高。事实表明，独特单元法具有巨大的潜力，可以对适用于砖石结构的多种地面位移模式进行建模。

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