Study on Test Setups for Determining the Failure Characterization in Masonry Components

IF 1.1 Q3 ENGINEERING, CIVIL
Didem Dönmez
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引用次数: 0

Abstract

This paper presents experimental studies and detailed micro-modeling on test setups to determine the strength and failure mechanism of brick masonry components. Experimental studies include compressive strength tests of masonry units, Red Clay brick masonry triplet tests, and Z-shaped flexural bond tests. Failure mechanism for masonry relates not only to mortar and brick material properties, but also to the bond strength between the brick and mortar. A contact law based on Cohesive Zone Model and Coulomb's law was used to describe the fracture behavior of mortar joints. Numerical studies are based on the interface cohesive model for mixed modes I and II. Tests were evaluated numerically using the Benzeggagh-Kenane mixed mode criterion. The results obtained from the FE simulation showed the reliability of computational modeling approaches for masonry bed joint behavior. Finally, a parametric study on masonry triplet tested under various compression stresses was performed by using the FE simulation. The results indicate the increase of normal compression stress leads to an increase in shear bond strength of masonry.
砌体构件破坏特性测定试验装置研究
为了确定砖砌体构件的强度和破坏机制,本文对试验装置进行了试验研究和详细的微观建模。试验研究包括砌体单元抗压强度试验、红土砖砌体三联体试验和z形弯曲粘结试验。砌体的破坏机理不仅与砂浆和砖的材料性能有关,而且与砖和砂浆之间的粘结强度有关。采用基于黏聚区模型和库仑定律的接触律来描述砂浆缝的断裂行为。数值研究基于混合模式I和II的界面内聚模型。采用benzegagh - kenane混合模态准则对试验进行数值评价。有限元模拟结果表明,所建立的砌体床节点性能计算模型是可靠的。最后,通过有限元模拟对不同压应力下砌体三联体进行了参数化研究。结果表明,正压应力的增大导致砌体抗剪强度的增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.60
自引率
0.00%
发文量
8
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