Correlations between structural damage and ground motion parameters during the Ms8.0 Wenchuan Earthquake
Correlations between structural damage and ground motion parameters during the Ms8.0 Wenchuan Earthquake
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汶川8.0级地震结构损伤与地震动参数相关性
DOI：
10.1016/j.soildyn.2014.11.005
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发表时间：
2015-05
影响因子：
4
通讯作者：
Zhao, Boming
中科院分区：
文献类型：
--
作者：
Wang, Zijun;Zhao, Boming
2008年5月12日发生在中国四川省的汶川8. 0级地震主要影响了龙门山断裂带沿着地区。中国强震台网中心在这次地震中共获得了420条三分量加速度记录，其中超过100 gal的记录有50多条。在本研究中，我们收集了48个近断层加速度记录，推导出强地面运动参数的峰值地面加速度，峰值地面速度，峰值谱加速度（5%的阻尼比）和谱强度（5%的阻尼比）。我们根据中国地震局和中国科学院的数据确定了20个目标地区的建筑物倒塌率（CR），CR结合了所有建筑类型的数据。建立了地震反应谱与相应地震动参数之间的易损性曲线，并在此基础上提出了结构的损伤判据。特别地，我们推导出了砖混结构和框架结构的易损性曲线。这些曲线表明不同的结构类型如何决定所承受的损害。此外，我们开发了一种方法来估计建筑物损坏分类。如果我们假设建筑物是按照修订后的《建筑抗震设计规范》中改进的抗震设防标准建造的，那么20个目标小区的预测CR将显著低于它们所遭受的实际破坏，这说明了该方法和修订后的规范的有效性。
The Wenchuan Earthquake with a magnitude of Ms 8.0 struck the Sichuan province of China on May 12, 2008, where it mainly affected the area along the Longmenshan fault. In total, 420 three-component acceleration records were obtained by the China Strong Motion Networks Centre during this seismic event, among which over 50 records exceeded 100 gal. In the present study, we collected 48 near-fault acceleration records to derive strong ground motion parameters in terms of the peak ground acceleration, peak ground velocity, peak spectrum acceleration (5% of the damping ratio) and spectrum intensity (5% of damping ratio). We determined the building collapse ratios (CRs) for 20 targeted districts based on data acquired from both the China Earthquake Administration and the Chinese Academy of Sciences, where the CRs combined the data for all building types. Fragility curves were established between the CRs and the corresponding ground motion parameters, based on which the damage criteria were proposed. In particular, we derived the fragility curves for brick-concrete structures and frame-structures. These curves indicate how different structural types can determine the damage sustained. In addition, we developed a method for estimating building damage classifications. If we assume that buildings are built according to the improved Seismic Fortification Criterion in the revised “Code for Seismic Design of Buildings”, the predicted CRs for the 20 targeted districts would be significantly lower compared with the actual damage they sustained, which illustrates the validity of both the method and the revised code.
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DOI：
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发表时间：
2000
期刊：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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