钢管约束型钢高强混凝土压弯构件的抗震性能研究  

Seismic behavior and strength of tubed SRC beam-columns filled with high strength concrete

作　　者：周绪红[1] 刘界鹏[1,2] 张素梅[3] 

机构地区：[1]兰州大学,甘肃兰州730000 [2]哈尔滨工业大学建筑设计研究院,黑龙江哈尔滨150090 [3]哈尔滨工业大学,黑龙江哈尔滨150090

出　　处：《土木工程学报》2010年第9期1-11,共11页China Civil Engineering Journal

基　　金：国家自然科学基金(50708027)

摘　　要：进行两个圆钢管约束型钢混凝土和两个方钢管约束型钢混凝土压弯构件的滞回性能试验研究,并进行两个普通型钢混凝土对比试件的试验研究。试件的混凝土为C70高强混凝土,试验中的主要参数为轴压比(n0=0.3和0.5)。试验结果表明,型钢混凝土和钢管约束型钢混凝土压弯构件易发生黏结破坏,因此工程实践中应在型钢翼缘设置抗剪连接件以防止黏结破坏的发生。相同用钢量条件下,圆钢管约束型钢高强混凝土柱的抗弯承载力、延性、极限层间变形能力和耗能性能明显高于型钢混凝土柱。随轴压比的提高,圆钢管约束型钢高强混凝土压弯构件的抗弯承载力提高,但轴压比对构件的层间变形能力无明显影响。相同用钢量条件下,方钢管约束型钢高强混凝土柱的抗弯承载力与型钢混凝土柱基本相同,但方钢管约束型钢高强混凝土柱的延性、极限层间变形能力和耗能性能明显高于型钢混凝土柱。随轴压比的提高,方钢管约束型钢高强混凝土压弯构件的抗弯承载力提高,但轴压比对构件的层间变形能力无明显影响。根据试验结果和理论分析结果建议了钢管约束型钢混凝土柱的截面抗弯承载力计算方法,提出设计建议,可为工程实践提供参考。The behavior of tubed SRC beam-columns was studied by testing two circular tubed SRC（CTSRC） columns,two square tubed SRC（STSRC） columns and two common SRC columns under combined axial constant compression and lateral cyclic load.High strength concrete of C70 was used in the tested columns.The test parameters was axial load ratio（n0=0.3 and 0.5）.The test results indicated that bond failure between the concrete and the flange of the steel section easily occurred in the SRC and tubed SRC beam-columns,therefore shear connectors should be welded on the flange of the steel section to prevent bond failure.The flexural strength,ductility,deformation ability and energy dissipation ability of a CTSRC beam-column were remarkably higher than those of a common SRC column with identical steel ratio.The flexural strength increased as the axial load ratio increased for CTSRC beam-columns,while the ultimate deformation ability was barely affected by the increment in axial load.The flexural strength of a STSRC beam-column was nearly the same with that of common SRC beam-column when steel ratio of the columns was the same,while the ductility,deformation ability and energy dissipation ability of a STSRC beam-column were distinctly higher than those of a common SRC beam-column.The flexural strength increased as the axial load ratio increased for STSRC beam-columns,while the ultimate deformation ability was barely affected by the increment in axial load ratio.Design method to calculate the flexural strength and design advices were proposed based on the test and analysis results.

关 键 词：钢管约束型钢混凝土 高强混凝土 压弯构件 轴压比 黏结破坏 抗弯承载力 

分 类 号：TU528.59[建筑科学—建筑技术科学]