大夹角V形墩局部应力测试和

【Abstract】wWw.shuoshilunwen.com Prestressed concrete continuous girder bridges and continuous rigid frame bridges which with V shaped-pier are called V-shaped Pier Bridge. As a kind of new bridge style, it has a rapid development in recent decades. It not only adds fresh artistic framework to the bridge architecture, but also he these advantages as making the whole bridge structure more metrical, magnifying the overall rigidity of the bridge, reducing span, and refining mechanical performance of girder. So that, the V-shaped pier bridge has strong competitiveness in the field of urban bridge which requires the consideration of bridge aesthetics more. But the various modeling, high degree of the complex structure, especially, there is complex stress distribution area where the rigid connection region of slant leg and beam or foundation. Therefore, it’s necessary to carry out local stress analysis on V-shaped pier by means of spatial finite element method, in order to master the information of mechanical characteristics and stress distribution in key position.In this thesis, summarize of V-shaped pier structure application is made in domestic and overseas firstly, including evolution of V-shaped pier bridge, comparison between V-shaped pier and common bridge pier, advantages and disadvantages of V-shaped pier, and overview related topic of domestic and international research present condition. Basic theory and analysis steps of FEM spatial analysis of structure and stress tests are introduced. The research object of this thesis is the V-shaped pier of Heihe Island Bridge, which has the characteristics of large intersection angle, two sides of V-shape. Involving structure dead load, prestress, and load effect which he affect on stress distribution, FEM model is established via engineering project. Methods of modeling on the basis of ANSYS software, and simulation of prestressed effect, concrete shrinkage and creep effect are discussed. Stress test plan is formulated in line with the actual situation of this bridge. Compared with testing data and numerical simulation data, calculative accuracy is verified, further more suggestions on structural optimization and the formulation of the construction control scheme are taken.