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首页> 外文会议>World conference on earthquake engineering;WCEE >PERFORMANCE-BASED PRELIMINARY SEISMIC ANALYSISAPPROACH OF NEW REINFORCED CONCRETEFRAME STRUCTURES
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PERFORMANCE-BASED PRELIMINARY SEISMIC ANALYSISAPPROACH OF NEW REINFORCED CONCRETEFRAME STRUCTURES

机译：基于性能的新型钢筋混凝土结构初步地震分析方法

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摘要

A formal theoretical basis is developed applying concepts of performance-based engineering for apreliminary seismic analysis of new reinforced concrete structures. Rather than advancement in complexanalytical techniques, the presentation of simple concepts relevant to the routine seismic design is hereadvocated.Within the performance-based seismic engineering framework the procedure is defined in terms ofa displacement-based approach. To this end, and according to the performance objective previouslyselected, the displacement demand assessment takes into account two main aspects. Firstly, thedeformation demand derived from the control of both the elastic and the post-elastic torsional twists mustnot exceed the structural displacement capacity actually provided. Secondly, a partial-sway admissibleplastic mechanism is proposed at early stage of the design.The general formulation expressed in the acceleration-displacement spectral format and defined asa function of constant ductility yield point spectra is presented. As a consequence, and following thecurrent state-of-the-art, the system yielding displacement is assumed as the analysis independent variable.Thus, by means of the structure's yield deformation the required strength is suitable computed accordingto the spectral region governing the design. The strength reduction factor is established in terms of theductility level derived from the displacement evaluation previously performed. Finally, a general step-bystepalgorithm is described, and a numerical example used to illustrate the implementation of the approachis presented.
机译：利用性能工程原理对新型钢筋混凝土结构进行初步地震分析，从而建立了正式的理论基础。本文提倡的是与常规地震设计有关的简单概念，而不是复杂分析技术的进步。在基于性能的地震工程框架内，该过程是基于基于位移的方法来定义的。为此，根据先前选择的性能目标，排量需求评估考虑了两个主要方面。首先，由弹性和后弹性扭转的控制所引起的变形需求不能超过实际提供的结构位移能力。其次，在设计的早期阶段提出了部分摇摆可塑性机制，提出了以加速度-位移谱格式表示并定义为恒定延性屈服点谱函数的一般公式。因此，并遵循当前的最新技术，将屈服位移的系统假定为分析自变量。因此，借助于结构的屈服变形，可以根据控制设计的光谱区域来计算所需的强度。根据从先前执行的位移评估得出的延展性水平确定强度降低因子。最后，描述了一般的逐步算法，并给出了用于说明该方法的实现的数值示例。

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