(1 西南科技大学土木工程与建筑学院, 绵阳 621010; 2 中国十九冶集团有限公司, 成都 610031)

摘要: 为充分了解藏式毛石砌体在竖向荷载作用下的变形形态和破坏机理,结合藏式毛石建筑的砌筑工艺和构造特征,对 2 组典型的毛石棱柱体试件进行轴心受压试验. 分析了试件的变形、裂缝发展及破坏特征,获得了试件抗压强度等基本力学参数及受压应力⁃应变曲线. 结果表明,藏式毛石砌体整体受力性能较差,且变形和损伤具有阶段性特征,应力⁃应变曲线呈现明显的非线性和锯齿形;碎石填缝砌筑工艺能提高试件承载力,减小试件的变形.最后提出了采用统一分式表达受压应力⁃应变曲线上升段的本构关系,此式能良好地表达相似文献中毛石砌体的应力⁃应变上升段曲线.

关键词: 毛石砌体; 抗压强度; 破坏机理; 本构关系

中图分类号:TU363 文献标志码:A 文章编号:1002⁃848X(2022)08⁃0118⁃06

DOI:10. 19701 / j.jzjg.20200510

Experimental study on compression mechanical properties of traditional Tibetan rubble masonry

WANG Yuan1,2, HUANG Hui1, JIA Bin1, WANG Ruheng1

(1 College of Civil and Architectural Engineering, Southwest University of Science and Technology, Mianyang 621010,China; 2 China 19th Metallurgical Group Co., Ltd., Chengdu 610031, China)

Abstract: In order to fully understand the deformation form and failure mechanism of Tibetan rubble masonry under verticalload combined with the masonry technology and structural characteristics of Tibetan rubble building, two groups of typicalrubble prism specimens were tested under axial compression. The deformation, crack development and failure characteristicsof specimens were analyzed, and the basic mechanical parameters such as compressive strength and compressive stress⁃straincurves were obtained. The results show that the overall mechanical properties of Tibetan rubble masonry are poor, and thedeformation and damage have stage characteristics, and the stress⁃strain curves are obviously nonlinear and zigzag. Gravel jointmasonry technology can improve the bearing capacity and reduce the deformation of specimens. Finally, a unified fractionalexpression was proposed to express the constitutive relation of the ascending section of the compressive stress⁃strain curve, whichcan well express the ascending section of the compressive stress⁃strain curves of rubble masonry in similar literatures.

Keywords:rubble masonry; compressive strength; failure mechanism; constitutive relation

∗国家自然科学基金项目(51908476, 51568058).

第一作者:汪源,硕士,主要从事毛石砌体结构力学性能研究,Email:1175781973@ qq.com.

[引用本文] 汪源,黄辉,贾彬,等. 传统藏式毛石砌体受压力学性能试验研究[ J]. 建筑结构,2022,52(8):118⁃123. WANG Yuan,HUANG Hui,JIA Bin, et al. Experimental study on compression mechanical properties of traditionalTibetan rubble masonry[J]. Building Structure,2022,52(8):118⁃123.