SHM-Based Seismic Performance Assessment of High-Rise Buildings under Long-Period Ground Motion
SHM-Based Seismic Performance Assessment of High-Rise Buildings under Long-Period Ground Motion
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DOI：
10.1061/(asce)st.1943-541x.0002323
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发表时间：
2019-06-01
影响因子：
4.1
通讯作者：
Xu, You-Lin
中科院分区：
文献类型：
--
作者：
Hu, Rong-Pan;Xu, You-Lin
远距离大地震产生的长周期地面运动会对高层建筑造成严重破坏，甚至对位于板内城市地区的高层建筑也造成严重破坏。因此，高层建筑的实时监测和震后性能评估至关重要。本文采用集成的最佳传感器放置和响应重建方案，分别提出了高层建筑在长周期地震期间和震后的确定性实时预警系统和概率震后性能评估方法。预警系统和评估方法都很好地利用了对所有关键结构响应的准确和完整的估计，这些响应是根据建筑物中安装的有限传感器的不完整测量数据重建的。预警系统实时监控建筑结构行为，一旦检测到结构反应超过预设安全阈值，就会发出不同级别的警告。该评估方法以概率的方式评估地震后结构构件的完整性，将重建的结构响应的极值分布与结构构件的易损性函数相结合，以确定结构构件的损坏概率。所提出的预警系统和评估方法被应用于超高层建筑作为案例研究。案例研究结果表明，所提出的预警系统和评估方法可行有效，具有在高层建筑中实际应用的良好潜力。 (c) 2019 年美国土木工程师学会。
Long-period ground motions from large-magnitude distant earthquakes can cause serious damage to high-rise buildings, even to those located in intraplate urban areas. Real-time monitoring and postearthquake performance assessment of high-rise buildings are therefore essential. Using an integrated optimal sensor placement and response reconstruction scheme, this paper proposes a determinstic real-time warning system and a probabilistic postearthquake performance assessment method for high-rise buildings during and after long-period earthquakes, respectively. Both the warning system and the assessment method make good use of the accurate and complete estimation of all the key structural responses reconstructed from the incomplete measurement data from limited sensors installed in the building. The warning system monitors the building structural behavior in real-time and issues various levels of warning whenever it detects structural responses exceeding the preset safety thresholds. The assessment method evaluates the structural component integrity after an earthquake in a probabilistic manner, incorporating the extreme value distribution of the reconstructed structural responses with the structural component fragility functions to determine the damage probabilities of the structural components. The proposed warning system and assessment method were applied to a superhigh-rise building as a case study. The results from the case study showed that the proposed warning system and assessment method are feasible and effective and have good potential for real application in high-rise buildings. (c) 2019 American Society of Civil Engineers.