斜拉桥异形索塔施工中临时水平横撑的应用研究
发布时间：2019-06-04 10:36
【摘要】：斜拉桥是一种高次超静定的复杂结构,索塔是其主要的承重构件,斜拉桥的活载和恒载几乎全通过索塔传递到下部的塔墩和基础,所以斜拉桥索塔是设计和施工控制的关键。考虑到索塔容易受风力、斜拉索大吨位拉力等外力作用,尤其是对于异形索塔,其受力更加复杂,并且变形和应力分布具有明显的空间性,所以索塔的施工质量对于整个斜拉桥来说起着至关重要的作用,本文以郑州新区龙湖内环路跨北饮水桥(12#桥梁)为背景,对其索塔施工过程中临时水平横撑进行详尽的计算分析。首先,本文对斜拉桥索塔在施工过程中,影响索塔实际线形及内力分布的可能因素进行分析,紧扣索塔施工控制的主要内容,分析各因素对索塔施工控制的影响,确定影响异形索塔的主要因素。其次,根据本工程异形索塔的结构特点,在索塔下部和中部4个斜柱的施工过程中,加入3道水平临时横撑,对索塔的线形及内力进行控制。应用桥梁计算软件MIDAS/CIVIL建立郑州新区龙湖内环路跨北饮水桥索塔施工过程模型,对每个施工阶段中斜柱的偏移量及应力值进行计算分析,研究水平临时横撑的作用效果。最后,对郑东新区龙湖内环路跨北饮水桥索塔施工控制中所需的一些主要数据进行分析,提出了用于索塔施工控制中水平临时横撑的主要参数,整个模型计算分析为斜拉桥索塔的设计与施工提供参考依据。
[Abstract]:Cable-stayed bridge is a kind of high-order statically determined complex structure, and cable tower is its main load-bearing component. The live load and dead load of cable-stayed bridge are almost all transferred to the lower tower pier and foundation through the cable tower, so the cable-tower of cable-stayed bridge is the key to design and construction control. Considering that the cable tower is easily subjected to external forces such as wind force and large tonnage tension of cable-stayed cables, especially for special-shaped cable towers, the force is more complex, and the deformation and stress distribution are obviously spatial. Therefore, the construction quality of the cable tower plays an important role in the whole cable-stayed bridge. This paper is based on the north drinking bridge (12# bridge) in the inner loop of Longhu in Zhengzhou New area. The temporary horizontal transverse brace in the construction process of the cable tower is calculated and analyzed in detail. First of all, this paper analyzes the possible factors that affect the actual alignment and internal force distribution of cable tower in the construction process of cable-stayed bridge, and analyzes the influence of each factor on the construction control of cable tower. Determine the main factors affecting the profiled cable tower. Secondly, according to the structural characteristics of the special-shaped cable tower, three horizontal temporary transverse braces are added to control the alignment and internal force of the cable tower in the construction process of the four inclined columns in the lower and middle parts of the cable tower. The bridge calculation software MIDAS/CIVIL is used to establish the construction process model of the cable tower of the north drinking water bridge in the inner loop of Longhu in Zhengzhou New area. The offset and stress value of the inclined column in each construction stage are calculated and analyzed, and the effect of horizontal temporary transverse brace is studied. Finally, some main data needed in the construction control of the north drinking water bridge cable tower in the Longhu inner loop of Zheng Dong New area are analyzed, and the main parameters used for the horizontal temporary transverse brace in the construction control of the cable tower are put forward. The calculation and analysis of the whole model provides a reference for the design and construction of cable tower of cable-stayed bridge.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4;U448.27
[Abstract]:Cable-stayed bridge is a kind of high-order statically determined complex structure, and cable tower is its main load-bearing component. The live load and dead load of cable-stayed bridge are almost all transferred to the lower tower pier and foundation through the cable tower, so the cable-tower of cable-stayed bridge is the key to design and construction control. Considering that the cable tower is easily subjected to external forces such as wind force and large tonnage tension of cable-stayed cables, especially for special-shaped cable towers, the force is more complex, and the deformation and stress distribution are obviously spatial. Therefore, the construction quality of the cable tower plays an important role in the whole cable-stayed bridge. This paper is based on the north drinking bridge (12# bridge) in the inner loop of Longhu in Zhengzhou New area. The temporary horizontal transverse brace in the construction process of the cable tower is calculated and analyzed in detail. First of all, this paper analyzes the possible factors that affect the actual alignment and internal force distribution of cable tower in the construction process of cable-stayed bridge, and analyzes the influence of each factor on the construction control of cable tower. Determine the main factors affecting the profiled cable tower. Secondly, according to the structural characteristics of the special-shaped cable tower, three horizontal temporary transverse braces are added to control the alignment and internal force of the cable tower in the construction process of the four inclined columns in the lower and middle parts of the cable tower. The bridge calculation software MIDAS/CIVIL is used to establish the construction process model of the cable tower of the north drinking water bridge in the inner loop of Longhu in Zhengzhou New area. The offset and stress value of the inclined column in each construction stage are calculated and analyzed, and the effect of horizontal temporary transverse brace is studied. Finally, some main data needed in the construction control of the north drinking water bridge cable tower in the Longhu inner loop of Zheng Dong New area are analyzed, and the main parameters used for the horizontal temporary transverse brace in the construction control of the cable tower are put forward. The calculation and analysis of the whole model provides a reference for the design and construction of cable tower of cable-stayed bridge.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4;U448.27
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