摘要
为了研究藏式石砌体轴心受压下的变形特征和损伤机理,对2组共8个三石叠放的棱柱体试件进行了轴心受压试验。2组试件分别反映普通毛石砌筑风格和藏式风格。得到了试件的开裂及破坏形态、变形特征和受压全过程应力-应变曲线。试验结果表明,藏式石砌体具有阶段性变形和损伤特征,应力-应变曲线与其他类型砌体存在差异。根据试验现象和试验数据提出了藏式石砌体轴心受压的开裂前应力-应变曲线本构关系表达式,采用两段式二次多项式来表达。该表达式与实验结果吻合度较好。对试验的适用性进行了探讨,提出了对后续试验的建议。
To find out the deformation characteristics and damage mechanism of compressed Tibetan-style stone masonry,an experimental research was carried out on 2 groups(8 specimens in all)stacked prisms under axial compression.One group simulates normal rubble stone masonry and the other simulates the Tibetan-style stone masonry.The crack and deformation characteristics,the failure modes,and the complete stress-strain curves were obtained.The research results show that the Tibetan-style stone masonry have staged deformation and damage characteristics,and the complete stress-strain curve is different from other types of masonry.Based on the experimental phenomena and the experimental data,the compressive constitutive relationship before cracking of the Tibetan-style stone masonry is proposed.The equations can be expressed by a two-segment curve with quadratic polynomials.The constitutive relationship is close to the experimental results.The applicability of prism testing was discussed.Suggestions for follow-up tests were proposed.
作者
滕东宇
杨娜
TENG Dong-yu;YANG Na(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;China Science Construction(Beijing)Institute of Engineering Technology Co.,Ltd,Beijing 100000,China)
出处
《工程力学》
EI
CSCD
北大核心
2018年第11期172-180,共9页
Engineering Mechanics
基金
国家自然科学基金面上项目(51778045)
国家自然科学基金优秀青年基金项目(51422801)
北京自然科学基金重点项目(8151003)
关键词
石砌体
抗压试验
破坏模式
本构关系
棱柱体
应力-应变曲线
stone masonry
compressive test
failure mode
constitutive relationship
prism
stress-stain curve
作者简介
滕东宇(1986―),男,吉林人,工程师,博士生,主要从事古建筑和装配式建筑研究工作(E-mail:tengdongyu@foxmail.com).;通讯作者:杨娜(1974―),女,辽宁人,教授,工学博士,博导,主要从事钢结构和古建筑研究工作(E-mail:nyang@bjtu.edu.cn)。
