公路涵洞震害分析与破坏等级划分

Analysis and classification of earthquake damage to highway culverts

提出涵洞与路段、桥梁、隧道等构成交通系统易损性分析单元,即作为震害影响因素参与交通系统的网络连通性分析。为了建立涵洞群体易损性分析方法,通过调查统计四川汶川特大地震震后陇南公路总段部分线路所辖的样本涵洞破坏情况,总结涵洞在特定的地震地质灾害环境中易损部位和易损现象,分析致灾原因,初步确定震害因子。并结合对比研究唐山大地震中涵洞震害资料,划分样本涵洞的破坏等级,下步推导公路涵洞群体的地震易损性经验统计公式。

The point of taking culvert as the vulnerability analysis bridge, tunnel, etc. is put forward, which considers that the seismic unit of traffic system, just as road section, damage impact factors are involved in the traf- fic system of network connectivity analysis. In order to establish the culvert group vulnerability analysis method, through investigating and counting up the damage to culvert sample located in Longnan Highway after the great Wenchuan earthquake in Sichuan Province of China, the vulnerable parts and performance of culvert in the context of a particular seismic geological disasters can be summarized. The disaster＇ s reason has been analysed, and the damage factors have been obtained. Comparing with the data of culverts in Tangshan earthquake, the damage level division is made, that will lay the foundation of deriving seismic vulnerability formula of highway culvert group at the next step.