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Estimation of Cyclic Interstory Drift Capacity of Steel Framed Structures and Future Applications for Seismic Design

机译:钢框架结构循环层间位移能力的估算及其在抗震设计中的应用

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摘要

Several studies have been devoted to calibrate damage indices for steel and reinforced concrete members with the purpose of overcoming some of the shortcomings of the parameters currently used during seismic design. Nevertheless, there is a challenge to study and calibrate the use of such indices for the practical structural evaluation of complex structures. In this paper, an energy-based damage model for multidegree-of-freedom (MDOF) steel framed structures that accounts explicitly for the effects of cumulative plastic deformation demands is used to estimate the cyclic drift capacity of steel structures. To achieve this, seismic hazard curves are used to discuss the limitations of the maximum interstory drift demand as a performance parameter to achieve adequate damage control. Then the concept of cyclic drift capacity, which incorporates information of the influence of cumulative plastic deformation demands, is introduced as an alternative for future applications of seismic design of structures subjected to long duration ground motions.
机译:为了克服目前在抗震设计中使用的参数的某些缺点,已经进行了一些研究来校准钢和钢筋混凝土构件的破坏指数。然而,在复杂结构的实际结构评估中研究和校准使用这些指标仍然是一个挑战。在本文中,基于能量的多自由度(MDOF)钢框架结构损伤模型明确考虑了累积塑性变形需求的影响,用于估计钢结构的循环漂移能力。为了达到这个目的,地震危险曲线被用来讨论最大层间漂移需求的局限性,以此作为实现适当破坏控制的性能参数。然后,引入了循环漂移能力的概念,该概念结合了累积塑性变形需求的影响信息,作为承受长期地面运动的结构的地震设计未来应用的替代方案。

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