砌块墙承载力及刚度退化影响因素试验研究  

Experimental Research on Influence Factors to Bearing Capacity and Stiffness Degradation of Small Concrete Block Walls

作　　者：盛志刚[1] 陈兴 潘鹏[3] SHENG Zhigang;CHEN Xing;PAN Peng(Key Laboratory of Building Collapse Mechanism and Disaster Prevention,Institute of Disaster Prevention,Beijing 101601,China;MCC Testing and Certification Co.,Ltd.,Beijing 100088,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]防灾科技学院中国地震局建筑物破坏机理与防御重点实验室,北京101601 [2]中冶检测认证有限公司,北京100088 [3]清华大学土木工程系,北京100084

出　　处：《工业建筑》2023年第10期94-99,共6页Industrial Construction

基　　金：中国地震局教师科研基金项目(20110104);国家自然科学基金项目(51778342)。

摘　　要：基于L_(9)(3^(4))正交试验设计的方法,选择了4个常见的工程因素(墙体高宽比、砂浆强度、轴向压力和芯柱数量),通过9个墙体试件的低周往复加载试验,深入研究了小砌块墙体抗剪性能和刚度退化特性随这些因素的变化而受到的影响。结果表明:砂浆强度对砌块墙体的抗剪性能影响最显著,其次是轴向压力;芯柱数量对墙体刚度退化特性的影响最显著;高宽比对砌块墙的抗剪性能和刚度退化特性影响均相对较小。针对以往砌块墙体刚度退化计算方法存在的问题,通过拟合筛选找到一种新模型。这种模型不仅能较好地描述墙体的刚度退化特性,还可以为统计分析提供合理的计算参数。Based on L9(34)orthogonal test design method,choosing four basic influence factors in masonry structures,a set of quasi-static loading tests with nine specimens were carried out to study the shear performance and stiffness degradaion of the small concrete block masonry walls.Four influence factors include:the aspect ratio of the walls,the strength of mortars,the axial compression and the grouted masonry strips.The results showed that the mortar strength was the greatest influential factor to the shear performance of the walls;the axial compression was in the second.For the stiffness degraadation,the greatest influential factor was the grouted masonry strips.Otherwise,a new computational model was suggested for describing the stiffness degradation of the concrete block walls.This model can describe stiffness-degrading of the walls in a better way,and provide some reasonable parameters for statistical analysis.

关 键 词：结构工程 小砌块墙体 低周往复荷载 正交试验 抗剪性能 刚度退化 

分 类 号：TU364[建筑科学—结构工程]