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首页> 外文期刊>Bulletin of earthquake engineering >Collapse fragility analysis of self-centering precast concrete walls with different post-tensioning and energy dissipation designs
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Collapse fragility analysis of self-centering precast concrete walls with different post-tensioning and energy dissipation designs

机译：不同后张紧和耗散设计自定心预制混凝土墙塌陷分析

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Self-centering precast concrete walls have been known as an efficient low-damage lateral force resisting system for use in seismic regions. Previous studies have mainly focused on investigating the hysteretic behavior of the system through experimental and numerical simulation. This paper evaluates the influences of different post-tensioning (PT) and energy dissipation (ED) designs, which can be uniquely controlled by designers, on the collapse performance of self-centering precast concretewalls. Additionally, influences of different response reduction factors (R) and collapse criterion during design and analysis are also examined. For this respect, an example four-story self-centering precast wall building was designed and simulated using the numerical model verified according to reported test data. A total of eight different designs are considered for the example building with varying parameters of PT and ED designs, and R values. The analytical models are then subjected to a suite of 44 ground motions with each scaled up until the collapse occurs. The fragility curves are generated using the incremental dynamic analysis data, and the results are then used for collapse risk assessment in accordance with FEMA P695 procedure. The evaluation results show that ED designs have more influence than PT designs to the overall collapse fragility of self-centering precast walls. Nevertheless, all the prototype walls in this study are proved to have acceptably low probabilities of collapse, which is required by the design code.
机译：已知自定心预制混凝土墙是一种有效的低损伤横向力抵抗系统，可用于地震区域。以前的研究主要集中在通过实验和数值模拟来研究系统的滞后行为。本文评估了不同后张紧后（PT）和能量耗散（ED）设计的影响，这些设计可以独特地由设计人员控制，从而在自定心预制CONTOREWALL的崩溃性能上。另外，还研究了在设计和分析期间的不同反应降低因子（R）和崩塌标准的影响。为此，使用根据报告的测试数据验证的数值模型来设计和模拟示例四层自定心预制墙建筑。对于PT和ED设计的不同参数和R值，共有八种不同的设计。然后将分析模型进行一套44个接地运动，每个缩小直到崩溃发生。使用增量动态分析数据产生脆弱曲线，然后根据FEMA P695程序使用结果用于崩溃风险评估。评估结果表明，ED设计与PT设计有更多的影响，以对自定心预制墙的整体塌陷脆性设计。尽管如此，本研究中的所有原型墙都被证明是可接受的崩溃概率，这是设计代码所需的崩溃概率。

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