高墩大跨非对称砼斜拉桥塔梁同步施工方法研究

Study on Synchronous Construction Method of Tower-beam of High-rise Piers and Long-span Asymmetrical Cable-stayed Bridges

针对国内外对非对称、高塔斜拉桥的研究较少的情况,以某高墩大跨非对称砼斜拉桥为例,对该斜拉桥的同步施工进行了详细研究。首先通过对不平衡荷载的研究分析了塔梁同步施工过程中结构的稳定性;然后基于有限元软件Midas/Civil,通过计算安全系数研究了结构在不平衡荷载和风荷载的作用下桥梁的稳定性。最后,利用有限元软件ANSYS,对桥梁的关键部位0~#块进行了稳定性分析,结果表明,在施工时应以确保主梁施工进度为主,同时尽量缩短各梁段的混凝土龄期。研究成果可为同类型桥梁的同步施工提供借鉴和参考。

In view of the fact that there are few studies on asymmetrical and high tower cable stayedbridges at home and abroad,this paper takes a high-span long-span asymmetric cable-stayed bridge as an example to study the synchronous construction of the cable-stayed bridge in detail.This paper first analyzes the structural stability of the tower and beam during the simultaneous construction of unbalanced loads.Then based on the finite element software Midas/Civil,the stability of the bridge under the effect of unbalanced load and wind load is studied by calculating the safety factor.Sex.Finally,using the finite element software ANSYS,the stability of the 0#block of the bridge is analyzed.The results show that the main beam construction progress should be ensured during construction,and the concrete age of each beam segment should be shortened as much as possible.The research results of this paper can provide reference and reference for the simultaneous construction of the same type of bridge.