斜拉桥合理施工状态计算方法对比分析研究

发布时间：2018-06-27 08:12

本文选题：斜拉桥 + 合理施工状态　；参考：《铁道科学与工程学报》2017年01期

【摘要】：为更快、更精确地确定斜拉桥合理施工状态,使其成桥后达到合理成桥目标状态,从目前确定斜拉桥合理施工状态常用的无应力状态控制法、倒拆-正装迭代法及正装迭代法的基本理论出发,以一座人行斜拉桥为项目依托建立三维空间有限元模型,通过对比分析3种方法在确定合理施工状态的实际应用及结果,得出了各方法在考虑混凝土收缩徐变效应时收敛本质及优缺点。研究结果表明:无应力状态控制法是通过对斜拉索无应力索长进行直接修正逐次逼近合理成桥目标状态;倒拆-正装迭代法及正装迭代法是通过对斜拉索到位索力进行直接修正逐次逼近合理成桥目标状态;无应力状态控制法收敛速度最快,计算精度最高,倒拆-正装迭代法次之,正装迭代法收敛速度最慢。
[Abstract]:In order to determine the reasonable construction state of the cable-stayed bridge faster and more accurately, and make it reach the reasonable target state of the bridge after the bridge, from the current non stress state control method commonly used to determine the reasonable construction state of the cable-stayed bridge, the basic theory of the upside down iterative method and the positive iteration method, the three-dimensional space is built on the basis of a pedestrian cable-stayed bridge as the support of the project. The finite element model, through comparison and analysis of the practical application and results of 3 methods in determining the reasonable construction state, has obtained the convergence nature and the advantages and disadvantages of each method when considering the concrete shrinkage and creep effect. The results show that the non stress state control method is through direct correction to the reasonable bridge by successive approximation of the non stress cable length of the cable-stayed cable. The target state, the inversion and the positive iteration method and the positive iteration method are through the direct correction of the cable force of the cable-stayed cable to the reasonable target state of the bridge. The non stress state control method has the fastest convergence speed, the highest calculation precision, the reverse loading iteration method and the slow convergence rate of the positive iteration method.
【作者单位】：河北建筑工程学院经济管理学院;长安大学桥梁与隧道陕西省重点实验室;
【基金】：国家自然科学基金资助项目(51308056) 国家西部交通建设科技资助项目(2009319812050) 陕西省交通运输厅科技资助项目(13-25k)
【分类号】：U445.4;U448.27

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