冯玉龙, 吴京, 孟少平. 连续摇摆墙-屈曲约束支撑框架抗震性能分析[J]. 工程力学, 2016, 33(增刊): 90-94. DOI: 10.6052/j.issn.1000-4750.2015.04.S051
引用本文: 冯玉龙, 吴京, 孟少平. 连续摇摆墙-屈曲约束支撑框架抗震性能分析[J]. 工程力学, 2016, 33(增刊): 90-94. DOI: 10.6052/j.issn.1000-4750.2015.04.S051
FENG Yu-long, WU Jing, MENG Shao-ping. SEISMIC PERFORMANCE ANALYSIS OF CONTINUOUSLY ROCKING WALL-BUCKLING RESTRAINED BRACED FRAMES[J]. Engineering Mechanics, 2016, 33(增刊): 90-94. DOI: 10.6052/j.issn.1000-4750.2015.04.S051
Citation: FENG Yu-long, WU Jing, MENG Shao-ping. SEISMIC PERFORMANCE ANALYSIS OF CONTINUOUSLY ROCKING WALL-BUCKLING RESTRAINED BRACED FRAMES[J]. Engineering Mechanics, 2016, 33(增刊): 90-94. DOI: 10.6052/j.issn.1000-4750.2015.04.S051

连续摇摆墙-屈曲约束支撑框架抗震性能分析

SEISMIC PERFORMANCE ANALYSIS OF CONTINUOUSLY ROCKING WALL-BUCKLING RESTRAINED BRACED FRAMES

  • 摘要: 高层摇摆墙的刚度和强度需求较大,且预制和吊装施工困难。为减小高层框架结构的位移响应和损伤集中效应,提出了连续摇摆墙-屈曲约束支撑框架(CRW-BRBF)结构体系,即连续摇摆墙控制层间位移分布模式,屈曲约束支撑承担地震作用并充当耗能减震装置,框架承担竖向荷载作用并作为抗震第二道防线。采用OpenSees软件对结构进行了22条地震波的动力时程分析,对比了屈曲约束支撑框架(BRBF)、摇摆墙-屈曲约束支撑框架(RW-BRBF)和CRW-BRBF的抗震性能。分析结果表明:连续摇摆墙可以减少BRBF结构的层间位移角不均匀系数;与RW-BRBF相比,CRW-BRBF中摇摆墙的弯矩和剪力需求均较小。

     

    Abstract: The stiffness and strength demands of high-rise rocking wall are large, and the pre-casting and erection constructions are difficult. To mitigate the structural displacement response and the damage concentration effect, a novel structural system of continuously rocking wall-buckling restrained braced frames (CRW-BRBF) is proposed. In this system, continuously rocking wall (CRW) controls its interlayer displacement distribution pattern. The seismic action is undertaken by buckling-restrained braces (BRB), which can be regarded as the device of energy dissipation to shock absorption. As a second aseismic line, a frame is employed to bear the vertical load. Nonlinear dynamic time-history analyses under 22 ground motions are conducted in OpenSees to investigate comparatively the seismic performance of buckling-restrained braced frames (BRBF), rocking wall-buckling restrained braced frames (RW-BRBF) and CRW-BRBF. The results show that the CRW can decrease the drift concentration factor (DCF) of the BRBF. Compared with the RW-BRBF, the moment and shear force demands of the rocking wall in the CRW-BRBF are smaller.

     

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