预压应力钢护筒加固钢筋混凝土短柱轴压承载力研究  

Axial Bearing Capacity Analysis of Reinforced Concrete Short Column Strengthened with Pre-stressed Steel Shield

作　　者：任振华 曾宪桃[2] 屈文俊[1,3] 梁桥[2] Ren Zhen-hua1,2 , Zeng Xian-tao2 , Qu Wen-jun1,3, Liang Qiao2(1. College of Civil Engineering, Tongfi University, Shanghai, 200092, China; 2. School of Building Engineering, Hunan Institute of Engineering, Xiangtan 411104, China; 3. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, Chin)

机构地区：[1]同济大学土木工程学院,上海200092 [2]湖南工程学院建筑工程学院,湖南湘潭411104 [3]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《工程抗震与加固改造》2018年第1期89-97,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51478346);湖南省科技计划项目重点专项(2015SK20543);湖南省教育厅重点项目(16A050);中国博士后基金项目(2016M591707);湖南工程学院博士启动项目

摘　　要：对配有纵向钢筋和箍筋的混凝土柱采用预应力钢护筒进行加固,使需要加固的混凝土柱在不遭受破损的情况下承载能力、变形能力及抗震性能均得到提高,该加固方法是作者发明的一种新的加固方法。为对这一新的加固体系的轴向承载力展开研究,在统一强度理论的基础上,通过分析预应力钢护筒加固的混凝土短柱轴心受压时的受力情况,考虑预应力、钢护筒和箍筋对混凝土的双重约束作用,导出了配筋钢护筒混凝土短柱的轴压承载力计算公式。比较计算了普通植筋扩大断面法、预应力钢筒加固混凝土柱的承载能力,结果表明:统一强度理论对于钢护筒配筋混凝土轴压短柱的理论计算有非常好的适用性,为预应力钢护筒混凝土柱的承载力分析计算提供了理论基础。The concrete column with longitudinal reinforcements and stirrups is strengthened with pre-stressed steel shield in order to increase the column ＇s bearing capacity under the condition of no suffer damage. Based on unified strength theory,the axial compression performances of short concrete column strengthened with pre-stressed steel shield are anayzied. On considering the constraint function of steel shield and the stirrup,the bearing capacity formul of the column strengthened with steel shield under ultimate axial compressive are derived. The analysis and calculation are carried out in order to compare the bearing capacity of the concrete columns strengthened with normal weld steel bars and enlarged section,and streng thened with pre-stressed stde shield. The results show that unified strength theory is suitable for the theoretical calculation of short concrete columns strengthened with steel shield,which provides theoretical basis for analysis and calculation of the concrete columns strengthened with pre-stressed steel shield.

关 键 词：预应力 统一强度理论 钢护筒 混凝土短柱 轴压承载力 

分 类 号：TU398[建筑科学—结构工程]