摘要
针对某新建轨道交通道岔区桥梁的T型桥墩墩帽开裂问题,通过建立上部结构全桥实体模型,得到T型桥墩墩顶的支座反力。采用3种方法探究裂缝产生的原因,即规范公式,积分法,非线性理论分析。计算结果均表明:桥墩顶部横向钢筋的钢筋应力过大,超过了钢筋应力容许值,这是导致产生可见裂缝的主要原因;基于桥墩空间弹性分析的计算结果超限时,应进行非线性分析。
In order to solve the cracking problem of T-type bridge piers cap of turnout region bridge in a newly built urban rail transit,the reaction force on the top of the T-shaped piers is obtained by establishing superstructure solid finite element model of whole bridge. The cracks on long cantilever T-type reinforced concrete bridge piers is analyzed by three methods-code：formula,integration methods,nonlinear theoretical analysis.The calculated results indicate that the steel stress of transverse reinforcement in the top of the pier is too large and exceeds the allowable stress,which is the main reason leading to excessive cracks. Study on the nonlinear analysis of reinforced concrete structures should be taken into account when the calculation result of bridge pier space elasticity analysis exceeds the limit.
作者
陈亮
郭敏
Chen Liang;Guo Min(Guangzhou Metro Design Institute Co., Ltd. Guangzhou 510010,China)
出处
《广东土木与建筑》
2018年第2期32-35,共4页
Guangdong Architecture Civil Engineering
关键词
T型桥墩
钢筋应力
裂缝
有限元分析
T-type bridge piers
steel stress
cracks
finite element analysis
