Limit states for post-earthquake assessment and recovery analysis of ductile concrete components
Limit states for post-earthquake assessment and recovery analysis of ductile concrete components
复制标题
延性混凝土构件震后评估与恢复分析的极限状态
DOI：
10.1177/87552930231170024
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发表时间：
2023
影响因子：
5
通讯作者：
J. Wallace
中科院分区：
文献类型：
--
作者：
Eyitayo A. Opabola;Saman A. Abdullah;K. Elwood;J. Wallace
震后评估程序要求部件变形限制，以确定目视检查位置和需要结构修复的位置。这项研究提出了一种确定构件变形极限的框架，用于对地震损坏的混凝土建筑进行详细的视觉检查和修复。首先，对延性混凝土构件(梁、柱和墙)的循环试验的观察表明，如果在以前的加载历史中没有超过侧向强度损失(LSL)开始时的变形，则这些构件的剩余能力(就强度和变形能力而言)可能是不受影响的。结果还表明，LSL起始处的变形通常对应于延性构件中纵向钢筋屈曲的开始。此外，利用实验数据，将乘数发展为ASCE/SEI 41模型参数在横向破坏(即a或d)时的分数，以预测LSL起始时的变形。随后，提出了一种考虑能力和需求的不确定性的确定构件变形极限的概率方法。详细目测检查的部件变形极限是这样定义的，即在LSL开始时，超过变形的概率很低(采用10%)。维修的部件变形极限定义为LSL开始时的中位数变形(即超过50%的概率)。
Post-earthquake assessment procedures require component deformation limits to identify locations for visual inspection and locations needing structural repair. This study proposes a framework for defining component deformation limits for detailed visual inspection and repair for earthquake-damaged concrete buildings. First, observations from cyclic tests of ductile concrete components (beams, columns, and walls) suggested that the residual capacity (in terms of strength and deformation capacity) of such components is likely uncompromised if the deformation at the initiation of lateral strength loss (LSL) is not exceeded in prior loading histories. The results also revealed that the deformation at the initiation of LSL typically corresponds to the onset of longitudinal bar buckling in ductile components. Furthermore, using experimental data, multipliers are developed as fractions of ASCE/SEI 41 modeling parameters at lateral failure (i.e. a or d) to predict deformation at initiation of LSL. Subsequently, a probabilistic approach is proposed for defining the component deformation limits, considering uncertainty in both capacity and demand. Component deformation limits for detailed visual inspection are defined such that there is a low probability (adopted as <10%) of exceeding the deformation at the initiation of LSL. The component deformation limit for repair is defined as the median deformation at the initiation of LSL (i.e. 50% probability of exceedance).
减轻钢筋混凝土结构地震损伤的新方法
DOI：
--
发表时间：
2006
期刊：
8th National Conference on Earthquake Engineering, San Francisco, USA (CD)
影响因子：
--
作者：
Pandey;G.R.;Mutsuyoshi;H.;Maki;T.
通讯作者：
T.