（西安建筑科技大学土木工程学院， 西安 710055）

［摘要］通过对机制土坯砖与不同外加剂砂浆砌筑的抗剪试件进行灰缝受剪性能试验研究，分析了不同砂浆外加剂对砂浆性能的影响，阐述了土坯砖砌体受剪破坏机理和破坏特征。试验结果表明:不同种类与掺量的外加剂下，试件抗剪强度基本上与砂浆抗压强度成正相关。在试验结果基础上建立了土坯砖砌体灰缝方向抗剪强度计算表达式，为机制土坯砖的进一步应用提供理论依据。

［关键词］机制土坯砖； 砂浆外加剂； 抗剪强度； 抗压强度

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2020)02-0087-03

Experimental study on shear strength of machined adobe bricks

Zhou Tiegang， Zhang Xiaochang， Zhao Xiang， Liu Bo

(School of Civil Engineering, Xi′an University of Architecture and Technology，  Xi′an 710055， China)

Abstract:Based on the experimental study on the shear behavior of mortar joints in shear test specimens made of machined adobe bricks and mortars with different admixtures, the effects of different mortar admixtures on mortar performance were analyzed, and the shear failure mechanisms and failure features of machined adobe bricks were explained. The experimental results show that: under different types and amounts of admixtures, the shear strength of the specimen is basically positively related to the compressive strength of the mortar. Based on the experimental results, a calculation formula for the shear strength of the machined adobe brick masonry in the direction of the mortar joint was established, providing a theoretical basis for the further application of the machined adobe brick.

Keywords:machined adobe brick; mortar admixture; shear strength; compressive strength

*国家科技支撑计划课题（2014BAL06B03），陕西省重点科技创新团队计划（2014KCT-31）。

作者简介：周铁钢，博士，教授，博士生导师，Email:zhoutiegang@126.com。