李琪勇;李杰;梁岩;

• 1:郑州市市政工程总公司
• 2:郑州大学土木工程学院

摘要(Abstract)：

考虑某铁路钢管混凝土拱桥拱肋架设施工中出现的拱轴线实测偏差,利用MIDAS/CIVIL有限元软件,建立桥梁空间有限元计算模型,依据设计规范限值要求,计算该桥结构的受力和变形,检算其成桥状态下的弹性稳定性,探讨拱轴线施工偏差对拱桥后续施工和运营安全的影响.计算结果表明:在目前的拱肋线形状态下,拱轴线偏差对该桥后续施工的变形、应力结果影响很小,对桥梁结构的安全基本没有影响,结构的受力性能和变形满足设计要求,可以不调整拱轴线,进行后续施工;运营阶段,钢管拱肋全截面受压,压应力最大值为-109 MPa,除拱脚局部外,钢管混凝土拱肋中的上弦和下弦混凝土全截面受压,结构的受力性能、变形和稳定性满足设计要求,该钢管混凝土拱桥结构安全.

关键词(KeyWords)： 钢管混凝土拱桥;拱肋架设;拱轴线;施工偏差;安全性评价;有限元分析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51608488);; 河南省基础与前沿技术研究项目(162300410264)

作者(Authors): 李琪勇;李杰;梁岩;

DOI: 10.13568/j.cnki.651094.2019.01.016

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