Step-by-Step Algorithm of Liner Control of Arch Ribs of CFST Arch Bridges

Journal of Chongqing Jiaotong University(Natural Science) ›› 2010, Vol. 29 ›› Issue (1): 1-3.

Step-by-Step Algorithm of Liner Control of Arch Ribs of CFST Arch Bridges

ZHAO Yang¹，ZHOU Shui-xing¹，LIU Jing²

1.School of Civil Engineering ＆ Architecture，Chongqing Jiaotong University，Chongqing 400074，China; 2.Traffic Survey ＆ Design Station of Wushan County in Chongqing，Chongqing 404700，China

Received:2009-09-28 Online:2010-02-15 Published:2015-01-22

钢管混凝土拱桥拱肋吊装线形控制的分步算法

赵洋¹ ，周水兴¹ ，刘静²

1.重庆交通大学土木建筑学院，重庆 400074;2.重庆市巫山县交通勘察设计室，重庆 404700

作者简介:赵洋(1984—)，男，河南驻马店市人，硕士研究生，主要从事大跨度桥梁设计与施工控制技术研究。E-mail:zhaoyang8526@163.com。
基金资助:
交通部西部交通科技项目(200631881422)

Abstract

Abstract: Aiming at the problem of height difference caused by the cable tension in segment installation of CFST arch ribs， the zero-order optimization method to calculate the pre-lift capacity and cable forces of each arch rib section in global installation is put forward，which takes the deformed arch axis caused by rib self-weight as the control objective，using the optimization theory and one-time cable tension method. Then，taking the results of global installation as objective，the pre-lift capacity and cable forces of every segment in installation are calculated by iteration algorithm，according to installation sequence of arch rib segment. The algorithm is applied to the arch axis control for New Long-men Bridge with 240m span in Wushan. It is showed that the arch axis under released cables is in well accordance with the expecting ones.

Key words: concrete-filled steel tubular (CFST) arch bridge, step-by-step algorithm, liner control, zero-order optimization method, global installment

摘要： 针对钢管混凝土拱桥拱肋分节段安装由扣索张拉引起的高程差问题，以裸拱自重变形后的拱轴线形为控制目标，基于最优化理论和一次扣索张拉法，提出先用零阶优化法按整体安装计算出各拱肋节段的预抬量和扣索索力，再以整体安装计算结果为目标，根据拱肋节段安装顺序，通过迭代方法计算出各个节段安装时的预抬量和扣索索力。将该算法应用到主跨240m的巫山新龙门大桥拱肋安装线形控制中，松索成拱后的线形与目标线形吻合良好。

关键词: 钢管混凝土拱桥, 分步算法, 线形控制, 零阶优化法, 整体安装

CLC Number:

U448.22

ZHAO Yang，ZHOU Shui-xing，LIU Jing. Step-by-Step Algorithm of Liner Control of Arch Ribs of CFST Arch Bridges[J]. Journal of Chongqing Jiaotong University(Natural Science), 2010, 29(1): 1-3.

赵洋，周水兴，刘静. 钢管混凝土拱桥拱肋吊装线形控制的分步算法[J]. 重庆交通大学学报（自然科学版）, 2010, 29(1): 1-3.

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