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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Evaluation of the seismic performance of a code-conforming reinforced-concrete frame building—from seismic hazard to collapse safety and economic losses
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Evaluation of the seismic performance of a code-conforming reinforced-concrete frame building—from seismic hazard to collapse safety and economic losses

机译：评估符合规范的钢筋混凝土框架房屋的抗震性能-从地震危险到倒塌的安全和经济损失

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摘要

A state-of-the-art seismic performance assessment is illustrated through application to a reinforced-concrete moment-frame building designed per current (2003) building code provisions. Performance is quantified in terms of economic losses and collapse safety. The assessment includes site-specific seismic hazard analyses, nonlinear dynamic structural response simulations to collapse, damage analyses, and loss estimation. When selecting ground motion records for nonlinear dynamic analyses that are consistent with a target hazard level expressed in terms of a response spectral value at the building's fundamental period, it is important to consider the response spectral shape, especially when considering higher hazard levels. This was done through the parameter commonly denoted by ε. Neglecting these effects during record selection is shown to lead to a factor of 5-10 overestimation of mean annual collapse rate. Structural response simulations, which properly account for uncertainties in ground motions and structural modelling, indicate a 2-7% probability of collapse for buildings subjected to motions scaled to a hazard level equivalent to a 2% probability of exceedance in 50 years. The probabilities of component damage and the means and coefficients of variation of the repair costs are calculated using fragility functions and repair-cost probability distributions. The calculated expected annual losses for various building design variants range from 0.6 to 1.1% of the replacement value, where the smaller losses are for above-code design variants and the larger losses are for buildings designed with minimum-code compliance. Sensitivity studies highlight the impact of key modelling assumptions on the accurate calculation of damage and the associated repair costs.
机译：通过应用到根据当前（2003年）建筑规范规定设计的钢筋混凝土弯矩框架建筑中，可以说明最新的抗震性能评估。性能根据经济损失和倒塌安全性进行量化。评估包括针对特定地点的地震危险性分析，对倒塌的非线性动力结构响应模拟，破坏分析和损失估算。当为非线性动态分析选择与根据建筑物基本周期的响应谱值表示的目标危害水平一致的地面运动记录时，重要的是要考虑响应谱的形状，尤其是在考虑更高的危害水平时。这是通过通常用ε表示的参数完成的。在记录选择过程中忽略这些影响会导致平均年崩溃率高估5-10倍。结构响应模拟适当地考虑了地面运动和结构建模的不确定性，表明建筑物的倒塌概率为2-7％，缩放比例等于危害水平，相当于50年内超过2％的概率。使用脆弱性函数和维修成本概率分布来计算部件损坏的概率以及维修成本的均值和变动系数。各种建筑设计方案的预计年度损失为重置价值的0.6％至1.1％，其中较小的损失用于规范以上的设计方案，较大的损失用于设计符合最低规范的建筑物。敏感性研究突出了关键建模假设对准确计算损害和相关维修成本的影响。

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