基于HAZUS平台的中国公路桥梁震害评估模型研究

Research on highway bridges seismic damage assessment system for China based on HAZUS

我国目前尚缺乏合理有效的公路桥梁震害评估模型。为促进我国公路桥梁震害评估系统的发展,基于HAZUS软件中使用的桥梁震害评估模型,对中国公路桥梁进行抗震等级分类,分别以1.0s时的谱加速度、地面峰值加速度和地面永久变形为指标,给出每类桥梁的震害评估模型参数,形成一个初步适用的中国公路桥梁震害评估模型。利用汶川地震后四川地区公路桥梁震害数据对该模型进行验证,结果表明该模型能较为准确地预测震害统计结果,从而证明该模型的合理性和适用性,可以为我国公路桥梁震害评估系统的发展提供一定的借鉴。

There is no effective seismic damage assessment model for highway bridges in China nowadays. This paper made an effort to promote the improvement of the seismic damage assessment system of China. Based on the models utilized in the HAZUS software, the classification according to the seismic resistance capacity for the highway bridges in China was conducted. For each class of the bridge, the seismic damage assessment parameters were assigned in terms of spectral acceleration at 1.0s, peak ground acceleration(PGA) and permanent ground deformation(PGD). Then a basic assessment model was formed which can be used for the highway bridges in China. The model was verified by the statistical results of the seismic damage of the highway bridges in Sichuan district under Wenchuan earthquake. It shows that the model proposed in this paper can predict the statistical seismic damage well, which demonstrates the model is reasonable and can provide references for the development of seismic damage assessment system in China.