基于村镇建筑的新型沙漠砂混凝土砌块墙体的抗震性能研究  

Study on seismic performance of new desert sand concrete block wall based on village buildings

作　　者：吴楠 王玉山[1,2] 王锐 牛爱宏 王迪 WU Nan;WANG Yushan;WANG Rui;NIU Aihong;WANG Di(College of Water&Architectural Engineering,Shihezi University,832000 Shihezi,China;Production&Construction Groups Engineering Laboratory for Seismic and Energy-Saving Building in High Earthquake Intensity and Cold Zone,832000 Shihezi,China;College of Sciences,Shihezi University,832000 Shihezi,China)

机构地区：[1]石河子大学水利建筑工程学院,石河子832000 [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832000 [3]石河子大学理学院,石河子832000

出　　处：《应用力学学报》2024年第2期372-381,共10页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金资助项目(No.51468058);新疆生产建设兵团第五师科技支撑项目(No.21GY02,20GY02)。

摘　　要：利用沙漠砂研发的蒸压加气混凝土砌块是一种新型砌体材料。为了研究这种新型砌块在村镇建筑中的应用,考虑在不同竖向压应力和构造柱的约束作用下,对4片沙漠砂蒸压加气混凝土砌块墙体开展拟静力试验,通过对比分析4片墙体在低周反复荷载作用下的破坏特性、力-位移曲线、骨架曲线、刚度退化曲线及延性等性能指标。结果表明:1)墙体主要以剪切破坏为主,未设置构造柱墙体主裂缝沿约45°贯彻整个墙体,设置构造柱墙体主裂缝呈“倒八”字型,且当竖向压应力增大时,墙体的抗震承载力也随之增大,抗侧刚度有所提高,但延性随之减小;2)竖向压应力相同情况下,对比分析表明设置构造柱墙体的极限承载力约是素墙体的2.22倍,延性提高了约60%,且刚度也有所提升;3)基于主拉应力理论和库仑破坏理论分别建立了适用于该新型砌块墙体的抗震承载力计算公式,且库仑破坏理论建立的抗震承载力计算公式应用更合理;4)建立了恢复力模型骨架曲线,能够较好地反映沙漠砂蒸压加气混凝土砌块墙体的试验特点。The autoclaved aerated concrete block developed by desert sand is a new type of masonry material.A pseudo-static test considering the different vertical compressive stresses and constraints of structural columns is carried out on four pieces of desert sand wall made of autoclaved aerated concrete block in order to study the application of this new block in village buildings.The failure characteristics i.e.,force-displacement curve,skeleton curve,stiffness degradation curve and ductility of the four walls under low cyclic loading are compared and analyzed.The test results show:1)The wall is mainly shear failure.The main crack of the wall without structural columns runs through the entire wall is about 45°,and the main crack of the wall with structural columns is in the shape of“inverted eight”.And when the vertical compressive stress increases,the seismic capacity of the wall increases,the lateral stiffness improves,but the ductility decreases.2)Under the same vertical compressive stress,comparative analysis shows that the ultimate bearing capacity of the wall with structural columns is increased by about 2.22 times that of plain wall,ductility increased by about 60%,and the stiffness is also improved.3)Based on the principal tensile stress theory and Coulomb failure theory,the calculation formulas for the seismic bearing capacity of the new block wall are established,and the calculation formula of seismic bearing capacity established by Coulomb failure theory is more reasonable in application.4)The skeleton curve of the established restoring force model can reflect the experimental characteristics of the desert sand autoclaved aerated concrete block wall well.

关 键 词：沙漠砂蒸压加气混凝土砌块 构造柱 拟静力试验 抗震性能 承载力 恢复力模型 

分 类 号：TU312[建筑科学—结构工程] TU528.2