配螺旋箍筋型钢高强砼短柱轴压性能退化研究  

Performance degradation of steel reinforced high-strength concrete columns confined by square spiral stirrups under axial compression

作　　者：柯晓军[1,2] 杨震[1] 陈宗平[1,2] 伍小萍 

机构地区：[1]广西大学土木建筑工程学院工程防灾与结构安全教育部重点实验室,广西南宁530004 [2]广西防灾减灾与工程安全重点实验室,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2017年第1期127-133,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51508112;51578163);广西自然科学基金资助项目(2015GXNSFBA139210);广西科学研究与技术开发计划项目(桂科转14124005-1-2);广西教育厅中青年教师基础能力提升项目(KY2016YB027);广西重点实验室系统性研究项目(2016ZDX02)

摘　　要：为了研究型钢高强混凝土短柱配置矩形螺旋箍筋后的轴压性能退化规律,设计6个试件进行试验,分析混凝土强度、箍筋间距和配箍形式对试件变形性能、耗能能力、刚度和损伤的影响。研究表明:与配普通箍筋试件相比,配螺旋箍筋试件的初始刚度大,损伤退化曲线出现拐点的时刻提前,但过后损伤发展缓慢,延性和耗能能力相差不大;随着混凝土强度的提高,配螺旋箍筋试件的延性和耗能能力逐渐降低,损伤累积加快;随着体积配箍率的增加,配螺旋箍筋试件的延性和耗能能力逐渐提高,初始刚度增大,损伤累积变慢。In order to research the performance degradation of steel reinforced high-strength concrete （ SRHC） short columns confined by square spiral stirrups, six specimens were designed for axial compression loading test considering the parameters of concrete strength,stirrup ratio and stirrup form,and influences of the parameters on the deformation,energy dissipation ,stiffness and damage of the specimens were analyzed. Test results indicate that the elastic stiffness of the SRHC specimen with square spiral stirrups is larger than that of the SRHC specimen with normal stirrups. The damage of SRHC specimens with square spiral stirrups accumulated more s low ly ,and the stirrup form has little influence on the energy dissipation and ductility. With the increase of concrete strength,the energy dissipation and the ductility of SRHC specimens become wo rse,moreover,the damage accumulated faster. With the increase of stirrup ratio, the energy dis s ip ation,ductility and elastic stiffness of SRHC specimens are improved,and the damage accumulated more slowly.

关 键 词：型钢高强混凝土 螺旋箍筋 轴压试验 性能退化 

分 类 号：TU398[建筑科学—结构工程]