摘要
为了解高铁列车产生振动对钢筋混凝土桥（RC桥）结构可靠性劣化的影响,分析桥的寿命、可用性、极限失效概率,首次使用基于可更新的生命周期分析法（RTLCA）,模拟了桥结构可靠性劣化过程。过程模拟考虑了桥是可维护的,并假设劣化只来源于列车行驶产生的震动。研究结果表明,不同失效概率值（a值）对系统可用性、系统寿命、系统极限失效概率均有影响,且形式上与现有文献得到的趋势相似。对文中提到的实例桥参数进行分析得到：极限失效概率大约在120年趋于稳定;小的失效概率值有利于长期的桥结构使用,可预计桥的明显退化波动时间段为30年~40年。
In order to investigate the influence of the vibration produced by running high-speed trains on the structural reliability degradation of reinforced concrete bridge, to analyze the age, availability, and probability of ultimate failure of the bridge, the Renewal Theory-based Life-cycle Analysis is adopted to simulate the bridge structural reliability degradation process. In the simulation of the deteriorating process the bridge is considered to be maintainable and deteriorating is assumed to be produced by vibration only from the running trains. The results show that the failure probability values affect the system availability, life, the limit of system failure probability, with the same trend as reported in existing literatures. For the bridge analyzed with mentioned parameters in the article, the limit of system failure probability reaches the stabilization in about 120 years, the smaller system failure probability is advantageous to the long-term use of bridge structure, the fluctuation period of obvious deteriorating can be expected to be 30 to 40 years.
出处
《应用力学学报》
CAS
CSCD
北大核心
2016年第1期162-167,189-190,共6页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(51050003)
辽宁省高校优秀人才支持计划项目(2009R07)
关键词
高速铁路
RC桥
列车运行震动
RTLCA
结构劣化
过程模拟
high-speed train
reinforced concrete bridge
train vibration
RTLCA
structural reliability deteriorating
deteriorating process
