配置600 MPa级钢筋的混凝土十形截面柱抗震性能试验  

Experimental on Seismic Behavior of Cross-shaped Concrete Columns with 600 MPa-grade Reinforcing Bar

作　　者：王文洋[1] 赵海龙[2] 王铁成[2] 付广东[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《土木工程与管理学报》2017年第5期126-132,共7页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51178304)

摘　　要：通过对6个配置600 MPa级钢筋的混凝土异形柱和1个配置HRB500钢筋的普通混凝土异形柱进行低周反复加载试验,分析轴压比和箍筋间距对600 MPa级钢筋异形柱构件的破坏特征、承载能力、变形能力、滞回能力、耗能能力以及刚度退化的影响规律,研究600 MPa级钢筋在异形柱中的适用性。结果表明:所有试验异形柱在剪力和弯矩共同作用下均发生弯曲剪压型破坏;小箍筋间距能够提高异形柱的延性性能和耗能能力,改善异形柱的抗震性能;轴压比对于异形柱变形能力有显著影响,高轴压比下,其变形能力差,但是承载力有所提高;与普通钢筋异形柱相比,配置600 MPa级钢筋的异形柱承载能力有所提高并且具有优良的抗震性能。Six special-shaped concrete columns with 600 MPa-grade reinforcing bar and one common special-shaped concrete column with HRB500 reinforcing bar were tested under cyclic loading. The influences of stirrup spacing and axial compression ratio on failure characteristic,bearing capacity,ductility performance,hysteretic properties,energy dissipation capacity and rigidity degradation were analyzed. And applicability of 600 MPa-grade reinforcing bar in special-shaped columns was studied.The results show that bending-shear failure was occurred for special-shaped columns under the combined action of compression,bending and shear. Special-shaped columns with smaller stirrup spacing ehibit better displacement ductility and better energy dissipation capacity. Axial compression ratio has a great effect on ductility performance. With the increasing of axial compression ratio,the displacement ductility decrease while the bearing capacity of special-shaped columns increases.Special-shaped columns with 600 MPa-grade reinforcing bar show better bearing capacity compared with special-shaped column with HRB500 reinforcing bar and exhibit good sesmic performance.

关 键 词：600 MPa级钢筋 异形柱 低周反复荷载 抗震性能 

分 类 号：TU375.3[建筑科学—结构工程]