干砌石砌体在压缩和剪切荷载作用下的试验特性

Experimental Characteristics of Dry Stack Masonry under Compression and Shear Loading.

作者信息

Lin Kun, Totoev Yuri Zarevich, Liu Hongjun, Wei Chunli

机构信息

Shenzhen Engineering Lab for Wind Environment and Technology, Shenzhen Key Lab of Urban & Civil Engineering Disaster Prevention & Reduction, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China.

Centre for Infrastructure Performance and Reliability, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.

出版信息

Materials (Basel). 2015 Dec 12;8(12):8731-8744. doi: 10.3390/ma8125489.

DOI:10.3390/ma8125489

PMID:28793741

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5458854/

Abstract

The behavior of dry stack masonry (DSM) is influenced by the interaction of the infill with the frame (especially the joints between bricks), which requires further research. This study investigates the compression and shear behaviors of DSM. First, a series of compression tests were carried out on both masonry prism with mortar (MP_m) and DSM prism (MP_ds). The failure mode of each prism was determined. Different from the MP_m, the stress-strain relationship of the MP_ds was characterized by an upward concavity at the initial stage. The compression strength of the MP_ds was slightly reduced by 15%, while the elastic modulus was reduced by over 62%. In addition, 36 shear-compression tests were carried out under cyclic loads to emphasize the influence of various loads on the shear-compression behavior of DSM. The results showed that the Mohr-Coulomb friction law adequately represents the failure of dry joints at moderate stress levels, and the varying friction coefficients under different load amplitudes cannot be neglected. The experimental setup and results are valuable for further research.

摘要

干砌石砌体（DSM）的性能受填充墙与框架之间相互作用（尤其是砖块之间的接缝）的影响，这需要进一步研究。本研究调查了DSM的压缩和剪切性能。首先，对有砂浆的砌体棱柱体（MP_m）和DSM棱柱体（MP_ds）进行了一系列压缩试验。确定了每个棱柱体的破坏模式。与MP_m不同，MP_ds的应力-应变关系在初始阶段具有向上的凹度。MP_ds的抗压强度略有降低，降低了15%，而弹性模量降低了62%以上。此外，在循环荷载下进行了36次剪压试验，以强调各种荷载对DSM剪压性能的影响。结果表明，莫尔-库仑摩擦定律在中等应力水平下充分代表了干接缝的破坏，不同荷载幅值下变化的摩擦系数不可忽略。试验装置和结果对进一步研究具有重要价值。