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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Probabilistic economic seismic loss estimation in steel buildings using post-tensioned moment-resisting frames and viscous dampers
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Probabilistic economic seismic loss estimation in steel buildings using post-tensioned moment-resisting frames and viscous dampers

机译：使用后张抗矩框架和粘性阻尼器的钢结构建筑物经济经济损失估算

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The potential of post-tensioned self-centering moment-resisting frames (SC-MRFs) and viscous dampers to reduce the economic seismic losses in steel buildings is evaluated. The evaluation is based on a prototype steel building designed using four different seismic-resistant frames: (i) conventional moment resisting frames (MRFs); (ii) MRFs with viscous dampers; (iii) SC-MRFs; or (iv) SC-MRFs with viscous dampers. All frames are designed according to Eurocode 8 and have the same column/beam cross sections and similar periods of vibration. Viscous dampers are designed to reduce the peak story drift under the design basis earthquake (DBE) from 1.8% to 1.2%. Losses are estimated by developing vulnerability functions according to the FEMA P-58 methodology, which considers uncertainties in earthquake ground motion, structural response, and repair costs. Both the probability of collapse and the probability of demolition because of excessive residual story drifts are taken into account. Incremental dynamic analyses are conducted using models capable to simulate all limit states up to collapse. A parametric study on the effect of the residual story drift threshold beyond which is less expensive to rebuild a structure than to repair is also conducted. It is shown that viscous dampers are more effective than post-tensioning for seismic intensities equal or lower than the maximum considered earthquake (MCE). Post-tensioning is effective in reducing repair costs only for seismic intensities higher than the DBE. The paper also highlights the effectiveness of combining posttensioning and supplemental viscous damping by showing that the SC-MRF with viscous dampers achieves significant repair cost reductions compared to the conventional MRF. Copyright (C) 2016 John Wiley & Sons, Ltd.
机译：评估了后张式自定心抗弯框架（SC-MRF）和粘性阻尼器减少钢结构建筑经济地震损失的潜力。评估基于使用四个不同抗震框架设计的钢结构原型：（i）传统抗弯框架（MRF）； （ii）带有粘性阻尼器的MRF； （iii）SC-MRF；或（iv）具有粘性阻尼器的SC-MRF。所有框架均按照欧洲规范8设计，并具有相同的柱/梁横截面和相似的振动周期。粘性阻尼器旨在将设计基准地震（DBE）下的峰值故事漂移从1.8％降低到1.2％。通过根据FEMA P-58方法开发脆弱性功能来估算损失，该方法考虑了地震地震动，结构响应和维修成本的不确定性。既要考虑倒塌的可能性，也要考虑由于过多的残余故事漂移而造成的拆除的可能性。使用能够模拟直至崩溃的所有极限状态的模型进行增量动态分析。还进行了关于残余层位移阈值影响的参数研究，超过该阈值，重建结构要比修理便宜。结果表明，对于等于或低于最大考虑地震（MCE）的地震烈度，粘性阻尼器比后张紧更加有效。仅在地震强度高于DBE的情况下，后张紧才有效降低了维修成本。本文还通过显示SC-MRF和粘性阻尼器相比传统MRF显着降低了维修成本，突出了将后张拉力和补充粘性阻尼相结合的有效性。版权所有（C）2016 John Wiley＆Sons，Ltd.

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