(1 兰州理工大学甘肃省土木工程防灾减灾重点实验室, 兰州 730050; 2 兰州理工大学防震减灾研究所, 兰州 730050)

［摘要］依据我国《建筑抗震设计规范》（GB 50011—2010）和借鉴日本隔震结构协会《被动减震结构设计·施工手册》，提出了非线性黏滞阻尼器减震结构的设计方法，通过实际结构的等效单自由度体系的减震性能曲线，确定非线性黏滞阻尼器的损失刚度比和等效支撑构件刚度比，进而应用于主结构，确定各楼层需配置的非线性黏滞阻尼器参数。利用这一方法对某6层钢筋混凝土框架结构进行减震设计，并采用SAP2000软件对结构装设阻尼器前后的抗震性能进行了分析对比。最后选择20条地震波对结构某榀横向中框架进行了增量动力分析，并采用倒塌储备系数评估结构的抗倒塌能力。结果表明：装设非线性黏滞阻尼器后结构的抗震性能有较大的改善，能够较好地达到性能目标的要求；结构的抗倒塌能力也明显提高。但不同地震动输入下结构的增量动力分析结果差别较大，因此地震波的合理选择及大震作用下动力分析结果的可靠性仍然是今后需进一步研究的主要问题。

［关键词］非线性黏滞阻尼器; 减震性能曲线; 位移降低率; 剪力降低率; 增量动力分析; 抗倒塌能力

中图分类号：TU352.1        文献标识码：A        文章编号：1002-848X(2014)04-0063-06

Performance-based seismic design and collapse resistance capacity evaluation for energy dissipation structures with nonlinear viscous dampers

Han Jianping1, 2, Chen Jun 2, Zou Xinlei 2

(1 Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,

Lanzhou University of Technology, Lanzhou 730050, China; 2 Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract: Design method for energy dissipation structures with nonlinear viscous dampers was proposed based on Code for seismic design of buildings (GB 50011-2010) and Design and construction manual for passively controlled buildings by Japan Society of Seismic Isolation Structure. Loss stiffness ratio of nonlinear viscous dampers and stiffness ratio of equivalent supporting components were determined based on the energy dissipation performance curve of equivalent single degree of freedom system of the actual structure and the results were applied in the main structure to determine parameters of viscous dampers on each floor. Then, a 6-storey reinforced concrete frame structure with nonlinear viscous dampers was designed by above method. SAP2000 was used to compare the seismic performances of structures with and without dampers. Finally, 20 ground motion records were chosen for increment dynamic analysis (IDA) on one of the transverse frames in this structure and collapse resistance capacity was evaluated in terms of collapse margin ratio (CMR). The results show that the seismic performance of the structure with dampers is greatly improved and the performance objectives are achieved. In addition, the collapse resistance capacity is improved effectively. Record-to-record variation is obvious in the results from IDA with different ground motion inputs, so it is still imperative to study reasonable selection of ground motion records and to analyze the dynamic response reliably under the rare earthquake in future.

Keywords: nonlinear viscous damper; energy dissipation performance curve; displacement reduction rate; shear reduction rate; incremental dynamic analysis; collapse resistance capacity

*甘肃省高校基本科研业务费项目资助(0904ZTB152)。

作者简介：韩建平，博士，教授，博士生导师，Email：jphan@lut.cn。

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