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首页> 外文会议>International conference on sustainable development of critical infrastructure 2014 >Unified Failure Model of Reinforced Concrete Members Subjected to Hazard Loads Ⅱ: Brittle Failure Analysis
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Unified Failure Model of Reinforced Concrete Members Subjected to Hazard Loads Ⅱ: Brittle Failure Analysis

机译：危险荷载下钢筋混凝土构件统一破坏模型Ⅱ：脆性破坏分析

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摘要

A simple and unified failure model is proposed for rectangular reinforced concrete (RC) members subjected to axial loads, bending, shear force and torsion. There are two distinct types of failure mechanisms, ductile failure and brittle failure. In the present paper, a lower-bound limit analysis of brittle failure is proposed. The normal-section at failure is considered intact and stress distributions at failure can be presumed. Then the interaction relationship can be deducted when stress distributions reach the failure criterion of concrete and RC members fails at the same time. Combined with the ductile failure analysis proposed in part Ⅰ, a unified failure model is obtained and it is in good agreement with experimental results. This unified failure model not only can explicitly explain failure mechanisms, ultimate bearing capacities can be easily calculated and the failure mechanism can be quickly determined. Overall, this model is significative for the analyses of reinforced concrete structures in engineering.
机译：针对矩形钢筋混凝土构件的轴向载荷，弯曲，剪力和扭转，提出了一种简单统一的破坏模型。有两种不同类型的失效机制，延性失效和脆性失效。本文提出了脆性破坏的下限分析。破坏时的法向截面被认为是完整的，可以假定破坏时的应力分布。然后，当应力分布达到混凝土的破坏准则而钢筋混凝土构件同时破坏时，可以推导出相互作用关系。结合第一部分提出的延性失效分析，获得了统一的失效模型，与实验结果吻合良好。这种统一的故障模型不仅可以明确地解释故障机理，还可以轻松计算极限承载力并快速确定故障机理。总体而言，该模型对工程中钢筋混凝土结构的分析具有重要意义。

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