基于修正摩尔库伦理论的装配式混凝土结构湿式连接接缝抗剪承载力研究  

Study on shear capacity of wet joint of prefabricated concrete structure based on modified Mohr Coulomb theory

作　　者：刘治国 田水[1] 谷倩[1] 梅裕安 潘应桂 Liu Zhiguo;Tian Shui;Gu Qian;Mei Yuan;Pan Yinggui(School of Civil Engineering,Wuhan University of Technology,WuHan 430070,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《建筑科学》2023年第9期1-7,共7页Building Science

基　　金：湖北省高校产学研后补助项目,2019-280,装配整体式叠合剪力墙结构受力性能试验及工程应用研究。

摘　　要：现阶段装配式混凝土结构设计的核心理念就是"等同现浇".由于大量接缝的存在,装配式混凝土结构并不能完全"等同现浇".湿式连接接缝的受力性能关系着装配式混凝土结构的安全性和可靠性.本文在对湿式连接接缝分析的基础上,提出了湿式连接接缝在轴力和剪力作用下的受力变形模型.引入修正摩尔库伦准则计算湿式连接接缝处混凝土的内部塑性功,运用虚功原理推导出了轴压力和剪力共同作用下湿式连接接缝的受抗剪承载力公式,并用78组推剪试验实测值对本文公式进行了验证,结果表明本文公式具有较好的精度,且具有一定安全储备.At present,the core concept of prefabricated concrete structure design is"equivalent to cast-in-situ".Due to the existence of a large number of joints,prefabricated concrete structures are not completely"equivalent to cast-in-situ".The resistance of wet joints is related to the safety and reliability of prefabricated concrete structures.Based on the analysis of the wet joint,the stress and deformation model of wet joint under the action of axial force and shear force it put forward.The internal plastic work of concrete at the wet joint is calculated by introducing the modified Mohr Coulomb criterion,and the shear bearing capacity formula of the wet connection joint under the joint action of axial pressure and shear force is derived by using the principle of virtual work,and the formula of this paper is verified by using 78 sets of measured values of pushing shear test data.The results show that the formula of this paper has good accuracy and has certain safety reserve.

关 键 词：装配式混凝土结构 湿式连接接缝 抗剪承载力 修正摩尔库伦理论 虚功原理 

分 类 号：TU399[建筑科学—结构工程]