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Development of displacement profiles for direct displacement based seismic design of regular reinforced concrete frame structures

机译：普通钢筋混凝土框架结构基于直接位移的抗震设计位移曲线的开发

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摘要

The structural displacement profile is vital for determining the equivalent single degree-of-freedom system parameters and the distribution of design lateral forces in the Direct Displacement-based Design (DDBD). In this paper, adaptive pushover analyses are conducted for 66 RC frame structures with various configurations and design parameters to calculate the lateral displacement, and the changing law of plastic hinge distribution and deformation mechanism of RC frame structures is investigated. Based on the analysis results, a refined displacement profile expression is proposed where the effect of elastic first order mode, maximum interstory drift, column-to-beam strength ratio, height-width ratio and the drift at first plastic hinge formation are involved. Its accuracy and reliability are validated by compared with the results of nonlinear time history analyses. Finally, an example is provided to illustrate the application of the proposed displacement profile expression in design considering multiple performance objectives.
机译：在基于直接位移的设计（DDBD）中，结构位移轮廓对于确定等效的单自由度系统参数和设计侧向力的分布至关重要。本文对66种不同构型和设计参数的RC框架结构进行了自适应推覆分析，计算了侧向位移，研究了RC框架结构塑性铰分布的变化规律和变形机理。根据分析结果，提出了一种精细的位移分布表达式，其中涉及弹性一阶模态，最大层间位移，柱梁强度比，高宽比和第一次塑性铰形成时的位移。通过与非线性时程分析结果进行比较，验证了其准确性和可靠性。最后，提供了一个示例来说明拟议的位移轮廓表达式在考虑多个性能目标的设计中的应用。

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