工程力学 ›› 2020, Vol. 37 ›› Issue (2): 221-229.doi: 10.6052/j.issn.1000-4750.2019.04.0158

• 土木工程学科 • 上一篇    下一篇

藏式石砌体在剪-压复合作用下抗剪性能研究

杨娜1, 滕东宇1,2   

  1. 1. 北京交通大学土木建筑工程学院, 北京 100044;
    2. 中科建(北京)工程技术研究院有限公司, 北京 100000
  • 收稿日期:2019-04-06 修回日期:2019-05-25 出版日期:2020-02-25 发布日期:2019-05-31
  • 通讯作者: 杨娜(1974-),女,辽宁人,教授,工学博士,博导,主要从事钢结构和古建筑研究(E-mail:nyang@bjtu.edu.cn). E-mail:nyang@bjtu.edu.cn
  • 作者简介:滕东宇(1986-),男,吉林人,工程师,博士生,主要从事古建筑和装配式建筑研究(E-mail:tengdongyu@foxmail.com).
  • 基金资助:
    国家自然科学基金面上项目(51778045);北京自然科学基金重点项目(8151003);国家自然科学基金优秀青年基金项目(51422801)

SHEAR PERFORMANCE OF TIBETAN STONE MASONRY UNDER SHEAR-COMPRESSION LOADING

YANG Na1, TENG Dong-yu1,2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
    2. China Science Construction(Beijing) Institute of Engineering Technology Co., Ltd, Beijing 100000, China
  • Received:2019-04-06 Revised:2019-05-25 Online:2020-02-25 Published:2019-05-31

摘要: 为研究藏式石砌体抗剪性能,对4组共13个不同压力作用下的泥浆砌筑石墙试件进行双剪试验,分析藏式石砌体沿通缝抗剪强度和破坏机理,研究利用灰缝抗剪强度评估墙体整体抗剪性能的方法。试验结果表明,藏式石砌体灰缝受剪破坏为泥浆层自身变形与界面分离同步发展的延性破坏过程,最终达到完全的界面剪切滑移状态。通过对试验数据的统计回归提出藏式石砌体灰缝的抗剪强度计算公式,计算结果和试验值吻合程度较好。泥浆与水硬性砂浆的主要性能差别在于粘结强度和摩擦系数均较低。通过2种理论模型,分析了砌体灰缝抗剪强度与剪-压复合作用下抗剪强度表达式之间的关系,利用其他研究者的试验数据进行了验证。提出了基于双剪试验结果的藏式石砌体抗剪强度预测表达式,可供藏式石砌体抗剪性能研究参考。

关键词: 藏式石砌体, 双剪试验, 抗剪性能, 抗剪强度, 剪-压复合作用

Abstract: To investigate the shear performance of Tibetan stone masonry, double-shear experiments along horizontal bed joints of 13 specimens (four groups in different compressing load) made of granites and earthen mortar were carried out. Through the test, the shear strength along horizonal bed joints of Tibetan stone masonry was obtained. Meanwhile the failure mechanism of bed joints was analyzed, and methods to estimate shear strength of Tibetan stone masonry through shear strength of bed joints were studies. The results showed that the shear failure mode of bed joints in Tibetan stone masonry was a ductile failure process in which the deformation of earthen mortar and interface separation were developing at the same time, and the ultimate mode was pure slip along the separating interface. A computational model of shear strength for Tibetan stone masonry was proposed based on statistical analysis of the test results and the results showed good agreement with the test data. Compared to hydraulic mortar, earthen mortar has a lower cohesion and friction coefficient. Through two theoretical models, the relationship between the bed mortar's shear strength parameters and the masonry's was analyzed, and experimental data of other researchers was used to verify the results. A calculation formula to estimate shear strength of Tibetan stone masonry based on data obtained by the double-shear test was proposed, and it can be referred to for studies on Tibetan stone masonry's shear performance.

Key words: Tibetan stone masonry, double shear test, shear performance, shear strength, shear-compression loading

中图分类号: 

  • TU363
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