邱灿星, 杜修力. 一种抗震性能化设计方法及在防屈曲支撑钢框架结构中的应用[J]. 工程力学, 2022, 39(11): 63-72. DOI: 10.6052/j.issn.1000-4750.2021.06.0463
引用本文: 邱灿星, 杜修力. 一种抗震性能化设计方法及在防屈曲支撑钢框架结构中的应用[J]. 工程力学, 2022, 39(11): 63-72. DOI: 10.6052/j.issn.1000-4750.2021.06.0463
QIU Can-xing, DU Xiu-li. A NOVEL PERFORMANCE-BASED SEISMIC DESIGN METHOD AND ITS APPLICATION IN BRB STEEL FRAMES[J]. Engineering Mechanics, 2022, 39(11): 63-72. DOI: 10.6052/j.issn.1000-4750.2021.06.0463
Citation: QIU Can-xing, DU Xiu-li. A NOVEL PERFORMANCE-BASED SEISMIC DESIGN METHOD AND ITS APPLICATION IN BRB STEEL FRAMES[J]. Engineering Mechanics, 2022, 39(11): 63-72. DOI: 10.6052/j.issn.1000-4750.2021.06.0463

一种抗震性能化设计方法及在防屈曲支撑钢框架结构中的应用

A NOVEL PERFORMANCE-BASED SEISMIC DESIGN METHOD AND ITS APPLICATION IN BRB STEEL FRAMES

  • 摘要: 该文围绕防屈曲支撑钢框架结构提出了一种新的抗震性能化设计方法。在选取性能目标时,为了兼顾建筑中结构主体和非结构成分的地震安全,该方法选取了峰值层间位移角、峰值楼面加速度和残余层间位移角共同作为性能目标。以等效单自由度体系的弹塑性时程分析计算结果进行参数分析,掌握防屈曲支撑钢框架结构随基本周期和强度折减系数变化的地震响应规律;根据结构动力学理论将单自由度体系的计算结果推广至多自由度体系;基于此发展出一种新的抗震性能化设计方法。为演示和论证该方法的有效性,该文选取了一栋六层防屈曲支撑钢框架结构的基准模型进行抗震设计,并开展一组地震动作用下的弹塑性时程分析。抗震性能评估的结果表明:由该方法设计的结构能够较好地同时满足多个设计目标的要求。该文的设计方法对于其他类型结构的抗震设计也具有一定的借鉴价值。

     

    Abstract: A performance-based seismic design method for buckling-restrained braced steel frames is proposed. Its three performance targets are in terms of the peak interstory drift ratio, the peak floor acceleration and the residual interstory drift ratio respectively, and it aims to ensure the seismic safety of structural and nonstructural components. Through the parametric analyses of equivalent single-degree-of-freedom (SDOF) systems, the relationships between the seismic response indexes and the fundamental period, as well as the strength reduction factor, are built. Then the SDOF-based results are incorporated into the multi-degree-of-freedom systems, and the design method is developed. To demonstrate and validate the method, this study conducts seismic design for a six-story benchmark buckling-restrained braced frame (BRBF) which are subjected to a suite of earthquake records. The performance evaluation indicates that the properly designed BRBF meets three performance targets at the same time. This study also sheds light on the seismic design of other types of buildings.

     

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