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单塔部分斜拉桥顺桥向地震作用下主梁的易损性部位分析
The vulnerability of the single-tower extra-dosed PC bridge’s beam
【摘要】 在已有的研究的基础上,针对单塔部分斜拉桥顺桥向地震作用下主梁的易损部位进行了研究.经分析,在顺桥向地震作用下,单塔部分斜拉桥易损性部位出现离塔第四根索到第五根索之间的近梁跨中段;地面运动加速度达到0.20g时,主梁有进入弹塑性阶段的概率,随地面运动加速度的增大,概率不断增大.
【Abstract】 This thesis would,based on the existing studies,conduct specific study on the vulnerability of the single-tower extra-dosed PC bridge’s beam.It reveals that the fragility position of partially cable-stayed bridge with single tower is locked closely to the midspan between the fourth and fifth cable under the action of earthquake along the longitudinal direction of bridge.The main girder is likelihood to reach the elastoplastic phase when the peak ground acceleration is up to 0.2g and the probability will increase as the peak ground acceleration increases.
【关键词】 单塔部分斜拉桥;
主梁;
易损部位;
地面运动;
【Key words】 single-tower extra-dosed PC bridge; beam; seismic vulnerability; ground motion;
【Key words】 single-tower extra-dosed PC bridge; beam; seismic vulnerability; ground motion;
【基金】 福建省自然科学基金资助项目(E0510010);福州大学科技发展基金资助项目(2007-XQ-21)
- 【文献出处】 福州大学学报(自然科学版) ,Journal of Fuzhou University(Natural Science Edition) , 编辑部邮箱 ,2013年04期
- 【分类号】U448.27;U442.55
- 【被引频次】1
- 【下载频次】101