石墙通缝抗剪强度试验及其可靠度分析

Experimental Study and Reliability analysis on the Shear Strength of Mortar Joint for Dry-Laid Stone Masonry Walls

灰缝抗震抗剪强度是石结构抗震性能评估最重要的参数。为研究石墙的通缝抗剪强度及计算方法,进行了25片粗料石干砌甩浆石墙试件的通缝双剪试验,研究参数包括砂浆强度和压应力。在试验的基础上提出了干砌甩浆石砌体通缝抗剪强度的计算公式,并对该计算公式进行可靠度分析,给出满足规范要求的石砌体通缝抗剪承载能力设计公式。研究成果可供石结构抗震性能评估参考。

The shear strength of mortar joint is one of the most important parameters to estimate the seismic behavior of stone masonry buildings.To investigate the shear strength and calculated method of stone masonry walls,twenty-five stone wall specimens fabricated with dry-laid method were tested under double shear loading.The main parameters are mortar strength and normal compressive stress.Based on the test results,the calculation equation of shear strength of ＂dry laid＂ stone walls is proposed,and the reliability analysis of the suggested equation is study.Finally,a design formula of shear capacity of mortar joint for dry-laid stone masonry walls which meets requirements of code is proposed.The research result can be referenced for seismic assessment of stone masonry structures.