公路干线多种类基础设施震害预测的实用方法

A practicalapproach for earthquake damage prediction of multi-type infrastructure in highway trunk

公路干线震害中多种类基础设施震害是其中最主要的一部分,主要包含公路、桥梁、隧道等,这些基础设施的震害对于整个公路干线的地震韧性的评估起到重要作用。采用最小二乘法原理和回归统计提出适合公路干线多种类基础设施震害指标的通用公式,其统计系数、建议系数以及损伤等级临界值的划分分别确定,给出多种类基础设施的震害等级的划分标准,并与汶川地震多条公路干线多种类基础设施的震害进行对比分析。研究结果表明:采用通用公式进行快速评估震后公路干线多种类基础设施的损伤等级,与真实震害损伤等级基本吻合,为震后快速评估整个公路交通干线的地震韧性提供重要依据。

The earthquake damage of multi-type infrastructure is the most important part of trunk highway damage,which mainly includes highway,bridge,tunnel and so on.The earthquake damage of these infrastructure plays an important role in evaluating the seismic toughness of the whole highway trunk line.Based on the principle of least square method and regression statistics,this paper puts forward a general formula suitable for earthquake damage index of multi-type infrastructure in highway trunk line.The statistical coefficient,suggestion coefficient and critical value of damage grade are determined respectively.The classification standard of earthquake damage grade of multi-type infrastructure is given,and the comparison of many kinds of highway infrastructure in Wenchuan earthquake is carried out.The analysis results show that the general formula is used to evaluate the damage grade of multi-type infrastructure quickly,which is in good agreement with the real damage grade.It provides an important basis for the rapid evaluation of seismic toughness of the whole trunk highway after the earthquake.