CAJ | 학술논문

基于位移延性比探讨规则连续梁桥在不同损伤状态下的结构性能控制指标；基于OpenSees平台采用纤维模型建立结构动力分析模型，选取100条强震记录通过非线性时程反应分析计算结构地震易损性曲线。研究不同墩高、支座形式及配箍率对结构地震易损性影响，结果表明，连续梁桥的地震易损性受延性发育程度影响较大，发生中等与轻微破坏概率较相近，对严重破坏有较好的耐损性；结构耐损性随墩高的增大而增加；采用板式橡胶支座可显著提高矮墩桥梁的耐损性，对高墩则有限；配箍率对结构早期损伤影响较小，对防倒塌能力影响较大。
기우위이연성비탐토규칙련속량교재불동손상상태하적결구성능공제지표；기우OpenSees평태채용섬유모형건립결구동력분석모형，선취100조강진기록통과비선성시정반응분석계산결구지진역손성곡선。연구불동돈고、지좌형식급배고솔대결구지진역손성영향，결과표명，련속량교적지진역손성수연성발육정도영향교대，발생중등여경미파배개솔교상근，대엄중파배유교호적내손성；결구내손성수돈고적증대이증가；채용판식상효지좌가현저제고왜돈교량적내손성，대고돈칙유한；배고솔대결구조기손상영향교소，대방도탑능력영향교대。
Structural performance indices for regular continuous girder bridges under different damage states were discussed based on the displacement ductility ratio.On the OpenSees platform,a structural dynamic analysis model was established by using nonlinear fiber beam elements.100 earthquake ground motion records were selected,and the nonlinear time-history analysis was performed,thus the fragility curves under different damage states were constructed. Through parametric analysis,the effects of pier height,bearing types and transverse reinforcement ratios on the fragility curves were studied.The results show that the development degree of ductility of the continuous bridge has a great effect on the structural seismic vulnerability.The fragility curves obtained under minor damage and moderate damage seem to be very close;while under extensive damage,the bridge shows a good performance against earthquake forces.With the increase of pier height,the lower level of damage probability of the structure is observed;meanwhile,the improvement in the fragility by using the plate rubber bearings is excellent for a short-pier bridge,but very limited for a high-pier one. The effect of increasing the transverse reinforcement ratio on fragility curves can be neglected for structural damage in early stage,but it can significantly increase the structural capacity from collapse.