摘要
为实现城市高架桥基于性能的抗震设计,以常规城市高架桥为研究对象,在性能水准(划分为完好、基本完好、轻微破坏、中等破坏和严重破坏)和性能指标(用桥墩顶点的位移延性系数表示破损指标)已经确定的前提下,着重讨论了性能水准的量化过程.具体步骤为:提出各性能水准与桥墩塑性铰区混凝土压应变和钢筋拉应变限值的对应关系;建立各性能水准与桥墩顶点位移和位移延性系数的关系;建立各性能水准与破损指标的量化关系.与已有研究的比较表明,所提出的性能指标合理.
By taking a urban performance levels （ integrity, viaduct as the research object and on the premise of the determinations of almost integrity, slight damage, moderate damage and serious damage） and performance indexes （damage index expressed by the displacement ductility coefficient of bridge pier top）, the quantitative process of performance levels was emphatically discussed to realize the performance-based seismic design of urban viaducts. Its concrete steps are to propose the corresponding relationship between each performance level and limits of concrete compression strain and steel tension strain in the plastic hinge of bridge pier, establish the relationship between each performance level and the displacement and the displacement ductility coefficient of bridge pier top, and set up the quantitative relationship between each performance level and the damage index. A comparison with the current researches indicates that the proposed performance indexes are rational.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2010年第1期54-58,64,共6页
Journal of Southwest Jiaotong University
关键词
性能水准
量化
混凝土压应变
钢筋拉应变
位移延性系数
破损指标
performance level
quantification
concrete compression strain
steel tension strain
displacement ductility coefficient
damage index
