摘要
为评估西部地区一码头工程典型引桥连续梁的抗震性能,采用OpenSees软件建立全桥模型并开展了该桥的地震易损性分析。从中国地震局数据库选取了100条汶川地震动数据,对桥梁模型进行时程分析,获得桥梁各构件的最大动力响应,将响应与地震动强度进行概率地震需求分析,采用可靠度理论建立了引桥各构件的易损性曲线。研究结果表明:引桥各桥墩具有较好的抗震性能;支座构件容易发生轻微或中等损伤,建议采用减隔震支座降低地震损伤概率。
A bridge model was built to study the seismic fragility of a continuous girder of approach structure in a wharf project in West China using OpenSees software. A hundred Wenchuan earthquake motion records were selected from the database of Chinese Earthquake Research Center. Base on time-history analysis,the maximum dynamic response of each bridge member was obtained. Dynamic response and seismic strength were used for probabilistic seismic demand analysis. The fragility curves were calculated based on reliability theory. The results indicate that the piers of approach structure have better seismic performance. Bridge bearings suffer slight or moderate damage. Isolation bearing is advised to reduce the probability of seismic damage.
出处
《铁道建筑》
北大核心
2016年第8期39-42,共4页
Railway Engineering
基金
国家科学自然基金(90715042)
西部交通科技项目(2009328222101)
关键词
码头工程
引桥结构
易损性
抗震能力
Wharf project
Approach structure
Fragility
Seismic capacity
