冻融循环对再生混凝土砖砌体抗压性能的影响  

Influence of Freeze-Thaw Cycle on Compressive Behaviors of Recycled Concrete Brick Masonry

作　　者：郑山锁[1] 宋哲盟 赵鹏[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《建筑材料学报》2016年第1期131-136,共6页Journal of Building Materials

基　　金：国家科技支撑计划(2013BAJ08B03);教育部高等学校博士学科点专项科研基金资助项目(20136120110003);陕西省科研项目(2012K12-03-01;2011KTCQ03-05;2013JC16)

摘　　要：基于国内人工气候模拟实验室,对24个再生混凝土砖砌体试件进行不同循环次数的冻融模拟试验,进而进行轴心抗压试验,研究了冻融循环次数对再生混凝土砖砌体抗压性能的影响.对比分析了砌体试件破坏形态、抗压强度、应力-应变关系随冻融循环次数增加的变化规律;建立了砌体试件抗压强度均值随冻融循环次数退化的关系式;通过对砌体试件实测应力-应变数据的拟合,得到了不同冻融循环次数下砌体试件的抗压本构关系曲线.所得结果可为冻融循环下在役砌体结构耐久性研究以及抗震性能评估提供理论基础.In order to study the effect of freeze-thaw cycles on the compression performance,24 recycled concrete brick masonry specimens were tested in the laboratory with climate simulation.The changing rule of compressive strength,elastic modulus and the constitutive relation curve along with the increase of the number of freeze-thaw cycle was established,and the degradation relationship of the average compressive strength of brick masonry structure with the number of freeze-thaw cycle was also established.Based on the fitting of the measured stress-strain curve of masonry,the masonry compressive constitutive relation curves with different cycles was obtained,which will provide theoretical basis for active masonry structure durability and seismic performance evaluation under the freeze-thaw cycle.

关 键 词：冻融循环 抗压强度 应力-应变关系 退化关系 

分 类 号：TU375[建筑科学—结构工程] P315.97[天文地球—地震学]