高强箍筋高强混凝土柱约束箍筋用量研究  

RESEARCH ON CONFINING REINFORCEMENT FOR HIGH-STRENGTH CONCRETE COLUMNS WITH HIGH-STRENGTH STIRRUPS

作　　者：孙治国[1] 司炳君[2] 王东升[1] 于德海[1] 

机构地区：[1]大连海事大学道路与桥梁工程研究所,辽宁大连116026 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《工程力学》2010年第10期182-189,213,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(50878033;50978042);地震行业科技专项基金项目(200808021);大连海事大学青年骨干教师基金项目(2009QN055)

摘　　要：为研究高强箍筋约束高强混凝土柱塑性铰区配箍要求,统计了国内外进行的98个矩形截面和11个圆形截面高强箍筋高强钢筋混凝土柱拟静力试验数据。分析了影响高强箍筋高强混凝土柱延性抗震能力的主要因素为配箍特征值、轴压比、纵筋配筋、混凝土保护层厚度等。在此基础上,通过回归分析分别以2%和3%极限位移角为延性目标,建议了具有85%保证率的高强箍筋高强混凝土柱塑性铰区约束箍筋用量计算公式及配箍构造措施,适用于混凝土轴心抗压强度在40MPa―110MPa之间,箍筋屈服强度在400MPa―800MPa之间,试验轴压比在0―0.6之间的高强箍筋高强混凝土柱。Quasi-static test results of 98 rectangular and 11 circular high-strength concrete （HSC） columns with high-strength stirrups （HSS） are collected to study the confining reinforcement for ductile HSC columns. Based on the analysis of test results, it is concluded the parameters that have significant influences on the ductility of HSC columns are characteristic value of stirrups, axial load ratio, longitudinal reinforcement and concrete cover thickness. Based on regression analysis, design equations and design details are suggested, which stipulate the amount of confining reinforcement required to achieve ultimate drift ratios of 2% and 3% with 85% assurance rate for HSC columns. The design equations and details can be applied to the columns with concrete compression strength of 40MPa―110MPa, stirrup yield strength of 400MPa―800MPa and experimental axial load ratio of 0―0.6.

关 键 词：结构工程 高强箍筋 高强混凝土 框架柱 延性 

分 类 号：TU375.3[建筑科学—结构工程]