工业灰渣-棉秆纤维灌孔砌块砌体的抗剪性能研究  

Study on shear behavior of industrial waste⁃cotton stalk fiber grouted block masonry

作　　者：陈瑞林 夏多田[1,2] 缪丰羽 李铮翔 张朵 肖长青 CHEN Ruilin;XIA Duotian;MIU Fengyu;LI Zhengxiang;ZHANG Duo;XIAO Changqing(College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi 832003,China;Xinjiang Production&Construction Groups Engineering Laboratory for Seismic and Energy-Saving Building in High Earthquake Intensity and Cold Zone,Shihezi 832003,China)

机构地区：[1]石河子大学水利建筑工程学院,石河子832003 [2]新疆兵团高烈度寒区建筑抗震节能技术工程实验室,石河子832003

出　　处：《建筑结构》2024年第12期110-117,共8页Building Structure

基　　金：国家自然科学基金项目(52168026、51468057)。

摘　　要：为研究工业灰渣-棉秆纤维灌孔砌块砌体的抗剪性能,对48个工业灰渣-棉秆纤维灌孔砌块砌体和6个未灌孔工业灰渣-棉秆纤维空心砌体进行了抗剪试验,探究了砌筑砂浆抗压强度、芯柱抗压强度和预压力对灌孔砌块砌体破坏特征、峰值位移和抗剪强度的影响,分析了灌孔砌块砌体的剪切变形性能。结果表明:提高砂浆抗压强度、芯柱抗压强度和预压力均能不同程度地提升灌孔砌块砌体的抗剪强度和峰值位移,其中芯柱抗压强度和预压力对砌体抗剪强度和峰值位移影响较大;与砂浆部分相比,随着芯柱抗压强度的提升,芯柱部分对砌体抗剪强度的贡献越来越大。基于梁式抗剪模型,提出了适用于无预压状态下工业灰渣-棉秆纤维灌孔砌块砌体的抗剪强度计算公式;根据试验结果拟合了预压状态下砌体的抗剪强度计算公式。In order to study the shear behavior of industrial waste-cotton stalk fiber grouted block masonry,shear tests of 48 industrial waste-cotton stalk fiber grouted block masonry and 6 industrial waste-cotton stalk fiber ungrouted hollow masonry were carried out.The effects of masonry mortar compressive strength,core column compressive strength and preload on the failure characteristics,peak displacement and shear strength of grouted block masonry were explored,and the shear deformation performance of grouted block masonry was analyzed.The results show that with the increase of mortar compressive strength,core column compressive strength and preload,the shear strength and peak displacement of grouted block masonry can be improved in varying degrees,and the core column compressive strength and preload have the greater influence on the shear strength and peak displacement of masonry.Compared with the mortar part,with the increase of core column compressive strength,the core column part contributes more and more to the shear strength of masonry.Based on the beam type shear resistance model,a formula for calculating the shear strength of industrial waste-cotton stalk fiber grouted block masonry in the absence of pre-compression was proposed.According to the experiment results,the formula for calculating the shear strength of masonry under shear compression was fitted.

关 键 词：灌孔砌块 抗剪强度 荷载-位移曲线 自保温工业灰渣-棉秆 芯柱 

分 类 号：TU364[建筑科学—结构工程]