支挡结构的震损快速评估方法研究

摘要

Retaining structures have been widely used to control many kinds of slopes,especially in high-intensity mountainous area in southwest of our country.Based on lots of survey data of retaining structures in WenChuan earthquake,the standard of damage grade classification was established in this paper,the damage grade of retaining structures was divided into minor,moderate,major and collapse. According to the WenChuan earthquake,the ground motion parameter calculation model was modified and the damage probability models were established base on the modified ground motion parameter calcu-lation model ,such that the ground motion is obtained,the damage probabilities of retaining structures for every damage states can be achieved easily.Adding to the loss ratio provided by the criterion,the seis-mic loss of retaining structures can be obtained quickly.Based on the seismic loss assessing method,it is easy to get the seismic loss of retaining structures rapidly after the earthquake.%支挡结构已被广泛地运用于各类边坡的治理，尤其在我国西南的高烈度山区。基于大量的汶川地震支挡结构震害调查数据，建立了支挡结构的破坏等级划分标准，将支挡结构的震害等级划分为轻微破坏、中度破坏、严重破坏和完全损毁。根据汶川地震的实际情况，对地震动参数计算模型进行了修正，并基于修正后的地震动参数计算模型建立了支挡结构的破坏概率模型，进而在已知地震动强度的情况下，可以得到支挡结构发生各级震害的概率。根据规范提供的损失比数据，可以快速计算得到支挡结构的震害损失数据。基于建立的震损评估方法，地震发生之后能够快速地对支挡结构的震害损失进行估计。