盾构隧道弯螺栓接头力学特性受预紧力影响的数值研究

发布时间：2018-02-25 09:22

本文关键词： 盾构隧道弯螺栓预紧力 DP模型　出处：《岩土工程学报》2017年S2期 　论文类型：期刊论文

【摘要】：利用ABAQUS有限元分析软件,通过数值模拟对盾构隧道弯螺栓接头在预紧力作用下的力学特性进行研究,为螺栓接头的设计和施工提供理论依据。采用符合混凝土受力特性的DP本构模型和符合钢材受力特性的塑性本构模型,研究预紧力对于弯螺栓接头力学特性的影响;施加不同的荷载,分析不同工况下预紧力作用效果的差异,揭示预紧力作用的机理。结果表明:预紧力改善了弯螺栓接头的力学特性,增强了螺栓约束管片的能力,减小了结构的整体变形。
[Abstract]:By using ABAQUS finite element analysis software, the mechanical characteristics of the bending bolt joint of shield tunnel under pretightening force are studied by numerical simulation. To provide theoretical basis for the design and construction of bolted joints, DP constitutive model which accords with concrete stress characteristics and plastic constitutive model with steel mechanical characteristics are adopted to study the effect of pretightening force on mechanical properties of bending bolt joints. By applying different loads, the difference of the effect of pretightening force under different working conditions is analyzed, and the mechanism of pretightening force is revealed. The results show that the pretightening force improves the mechanical properties of the bending bolt joint and enhances the ability of the bolt to restrain the segment. The whole deformation of the structure is reduced.
【作者单位】：天津大学滨海土木工程结构与安全教育部重点实验室;天津大学建筑工程学院;
【基金】：国家重点研发计划项目(02016YFL0802403) 国家自然科学基金项目(51778412,51378342)
【分类号】：U455.43

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