土坯砌体单轴受压本构模型研究  

STUDY ON UNIAXIAL COMPRESSION CONSTITUTIVE MODELS OF ADOBE MASONRY

作　　者：阿肯江·托呼提[1] 沙吾列提·拜开依[1] 曹耿[1] 

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047

出　　处：《工程力学》2012年第12期295-301,315,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(50768010;50968015)

摘　　要：通过土体材料的土工试验及泥浆立方体、土坯和土坯砌体单轴抗压试验,分析了土体材料的工程性质和单轴受压下土坯砌体的应力-应变关系。建立了泥浆立方体、土坯和土坯砌体的弹性模量与其抗压强度之间的关系方程,提出了土坯砌体抗压强度的简化计算公式。基于Weibull分布的损伤统计强度理论,利用应力-应变曲线峰值点的特征,建立了损伤修正统计本构模型,并与试验数据进行了比较,验证了损伤修正统计本构模型。研究表明:土坯砌体损伤统计本构模型,在峰值应力前期,损伤修正统计本构模型与试验数据吻合很好;在峰值应力后期,由损伤修正统计本构模型计算的应力值比土坯砌体试验应力值偏小。研究结果可为土坯砌体墙的抗震性能研究提供理论参考。Through the soil test of earth material and the uniaxial compression test of mud cubes, adobe and adobe masonry, engineering properties of earth material and the uniaxial compression stress-strain relationship of adobe masonry are analyzed. The equation between the elastic modulus and compressive strength of mud cube, adobe and adobe masonry has been established, and the simplified calculation formula of compressive strength of adobe masonry is proposed. Based on damages and statistical strength theory with the Weibull distribution, and using characteristic points of stress-strain curve, the damage fixed statistical constitutive model has been established, and the damage fixed statistical constitutive model is validated by comparing with the experimental data. It is shown that, before the peak stress, the results from the proposed damage corrected statistical constitutive model coincides with the experimental data very well, and beyond the peak stress, the results calculated by the model less than the results obtained with experiment. The results provides for a reference for researching the seismic behaviors of adobe masonry buildings.

关 键 词：土坯砌体 本构模型 抗压试验 损伤统计 土体材料 

分 类 号：TU506[建筑科学—建筑技术科学] TU361