改性增强土坯砌体单轴受压性能试验研究及数值模拟  

Experimental study and numerical simulation of uniaxial compression performance of modified reinforced adobe masonry

作　　者：乃比·吾斯曼 阿肯江·托呼提[1] 哈斯也提·哈里丁[1] 那斯尔热拉·吾普尔 Wusiman Nai-bi;Tuohuti Aken-jiang;Haliding Hasiye-ti;Wupuer Nasierre-la(College of Architectural Engineering,Xinjiang University y Urumqi 830047,China;不详)

机构地区：[1]新疆大学建筑工程学院

出　　处：《工程抗震与加固改造》2019年第5期83-89,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51468060)

摘　　要：为改善土坯砌体从中部开裂的破坏缺点并提高土坯砌体抗压强度,通过对改性土坯砌体以及在水平灰缝配钢丝网土坯砌体进行单轴轴心抗压强度试验、采用ABAQUS软件对试件有限元分析,描述了试验过程及破坏特征。结果表明:泥浆和土坯砌块同时改性时土坯砌体抗压强度一定的程度上有所提高;与改性土坯砌体相比,水平灰缝配置钢丝网土坯砌体抗压强度、延性有所提高,裂缝扩展缓慢,明显改善土坯砌体往往从中部开裂的破坏特征;塑性和混凝土塑性损伤本构模型,可较好地模拟其土坯砌体的损伤演化。研究结果对土坯砌体加固和数值分析有一定的参考价值。In order to improve the failure shortcomings of adobe masonry cracking in the middle and the compressive strength of adobe masonry,the uniaxial compressive strength tests of modified adobe masonry and steel wire mesh masonry with horizontal grey joints are carried out,and the Gnite element analysis of the specimens is carried out by ABAQUS software.The test process and the failure characteristics are described.The results show that the compressive strength of adobe masonry is improved to some extent when the mud and adobe blocks are modified simultaneously.Comparing with the modified adobe masonry without horizontal mortar joint reinforcement,the compressive strength and ductility of adobe masonry strengthened by stainless steel grids placed in the horizontal joints of mortar are improved,and the crack propagation is slow,which obviously improves the failure characteristics of adobe masonry which often cracks from the middle.The plastic damage constitutive model and concrete plastic damage constitutive model can well simulate the damage evolution of adobe masonry.The results provides for a reference for the reinforcement of adobe masonry and numerical analysis.

关 键 词：土坯砌体 水平灰缝加固 钢丝网 抗压强度 损伤本构 有限元分析 

分 类 号：TU361[建筑科学—结构工程]