地震工程学报2016，Vol.38Issue(5)：701-706,6.DOI:10.3969/j.issn.1000-0844.2016.05.0701
既有大跨度混凝土拱桥震害机理分析
Mechanism of Seismic Damage of a Large-span Concrete Arch Bridge
摘要
Abstract
The study of the damage mechanism of bridges is an important procedure that turns seismic damage investigation results into a practical technology.The damage features of arch bridges during the Wenchuan earthquake of 2008 differ from those of other earthquakes.Based on the data collected from the Wenchuan earthquake,the seismic damage mechanism of the Jinhua bridge was studied through post-earthquake investigation and numerical analysis.From the site-damage survey,it was found that the Jinhua bridge damage was mainly concentrated in the main rib and arch column,showing mainly concrete cracking and ring cracks of the arch column.The damage mechanism of the rib arch and arch column was simulated by FEM analysis,and the sim-ulation results showed that under seismic loads,the flexural capacity of the spring cross-section of the main rib arch did not meet seismic requirements,while that of the vault cross-section did meet the requirements;flexural cracking appeared at the bottom section of the 8# arch column.It was concluded that the simulation results agreed well with post-earthquake investigation,and they can provide references for the seismic design of long-span arch bridges in mountainous areas with higher intensity.This paper also proposes some countermeasures for bridge design and con-struction techniques to minimize typical earthquake damage,and hopes to provide references for future bridge construction.关键词
上承式混凝土拱桥/震害/机理分析Key words
deck-type concrete arch bridge/seismic damage/mechanism analysis分类
交通工程引用本文复制引用
唐堂,钱永久..既有大跨度混凝土拱桥震害机理分析[J].地震工程学报,2016,38(5):701-706,6.基金项目
国家自然科学基金项目(51178395) （51178395）
四川省交通运输厅公路局(2011C21-4-1) （2011C21-4-1）
