传统藏式毛石砌体受压力学性能试验研究

引用文献:

汪源 黄辉 贾彬 王汝恒. 传统藏式毛石砌体受压力学性能试验研究[J]. 建筑结构,2022,48(08):118-123.

WANG Yuan HUANG Hui JIA Bin WANG Ruheng. Experimental study on compression mechanical properties of traditional Tibetan rubble masonry[J]. Building Structure,2022,48(08):118-123.

作者:汪源 黄辉 贾彬 王汝恒
单位:西南科技大学土木工程与建筑学院 中国十九冶集团有限公司
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
作者简介:汪源,硕士,主要从事毛石砌体结构力学性能研究,Email:1175781973@qq.com。*黄辉,博士,副教授,主要从事石砌体结构加固改良技术研究,Email:huang871005@126.com。
基金:国家自然科学基金项目(51908476,51568058)。
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Experimental study on compression mechanical properties of traditional Tibetan rubble masonry
WANG Yuan HUANG Hui JIA Bin WANG Ruheng
(College of Civil and Architectural Engineering, Southwest University of Science and Technology China 19th Metallurgical Group Co., Ltd.)
Abstract: In order to fully understand the deformation form and failure mechanism of Tibetan rubble masonry under vertical load combined with the masonry technology and structural characteristics of Tibetan rubble building, two groups of typical rubble prism specimens were tested under axial compression. The deformation, crack development and failure characteristics of specimens were analyzed, and the basic mechanical parameters such as compressive strength and compressive stress-strain curves were obtained. The results show that the overall mechanical properties of Tibetan rubble masonry are poor, and the deformation and damage have stage characteristics, and the stress-strain curves are obviously nonlinear and zigzag. Gravel joint masonry technology can improve the bearing capacity and reduce the deformation of specimens. Finally, a unified fractional expression was proposed to express the constitutive relation of the ascending section of the compressive stress-strain curve, which can 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
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