张飞, 黄福云, 王燕.考虑日照温差效应的连续刚构桥悬浇施工立模标高确定研究[J].河南理工大学学报（自然科学版）,2020,39(4):147-154.

ZHANG F, HUANG F Y, WANG Y.Study on the determination of the initialize heights of girders of continuous rigid frame bridge in cantilever casting construction considering sunshine temperature difference effect[J].Journal of Henan Polytechnic University(Natural Science) ,2020,39(4):147-154.

考虑日照温差效应的连续刚构桥悬浇施工立模标高确定研究

张飞1, 黄福云2, 王燕1

1.福建江夏学院工程学院，福建 福州 350108;2.福州大学土木工程学院，福建 福州 350116

摘要:为消除日照温差效应对连续刚构桥悬浇施工立模标高设置的不利影响，结合某V型墩连续刚构桥的施工线形控制，采用有限元分析和工程实测相结合的方法，揭示日照温差效应对主梁线形的影响规律，提出一种两次实测-插值法，消除日照温差对立模的影响，并对立模标高、施工预拱度、活载预拱度的确定进行分析。结果表明：在悬臂施工阶段，日照温差效应引起的主梁竖向变形呈抛物线形状，变形效应显著，施工量测时应尽量避开较高的日照温度时段；在非理想时段进行立模放样时，采用两次实测-插值法，计算考虑日照温差效应的立模标高修正值；梁块施工预拱度的确定是一个不断进行实测、识别、修正、正装分析的动态计算过程，该桥合龙顶推施工产生的竖向变形在施工预拱度曲线中起控制作用；推荐按照等量代换的思想设置一个全桥范围内作用均布荷载的工况进行活载预拱度计算。最终，将本文研究成果应用到实际工程中，主梁线形控制良好，验证了本文计算方法的有效性。

关键词:连续刚构桥;日照温差效应;两次实测-插值法;立模标高;预拱度

doi:10.16186/j.cnki.1673-9787.2020.4.21

基金项目:国家自然科学基金资助项目（51578161 ）；福建省教育厅教师科研项目（JAT170614）

收稿日期:2019/12/05

修回日期:2020/02/16

出版日期:2020/07/15

Study on the determination of the initialize heights of girders of continuous rigid frame bridge in cantilever casting construction considering sunshine temperature difference effect

ZHANG Fei1, HUANG Fuyun2, WANG Yan1

1.College of Engineering，Fujian Jiangxia University，Fuzhou 350108，Fujian， China;2.College of Civil Engineering，Fuzhou University，Fuzhou  350116，Fujian，China

Abstract:To eliminate the adverse effect of sunshine temperature difference on the initialize heights of girders of continuous rigid frame bridge constructed by cantilever casting， combined with the engineering practice of linear control of a V-shaped pier continuous rigid frame bridge， the influence rule of sunshine temperature difference on girder linear was revealed by the methods of finite element analysis and engineering measurement. On this basis， the method of two-time measurement-interpolation was proposed to eliminate the sunshine temperature difference effect. Meanwhile， the initialize heights of girders， construction pre-camber and live load pre-camber wee analyzed. The results showed that ： in the cantilever construction stage， the vertical deformation of the main girder caused by the sunshine temperature difference was in the shape of parabola， the deformation effect is significant. Therefore， the construction measurement should try to avoid the higher sunshine temperature period. During the non-ideal period， the template setting out adopted the method of two-time measurement interpolation which the calculation should take into account the correction affected by the sunshine temperature difference. The determination of construction pre-camber was a dynamic calculation process of continuous measurement， identification， correction and forward analysis. The vertical deformation of main girder by jacking force played a controlling role in the curve of pre-camber. It was recommended to calculate the live load precamber by setting up a condition with uniformly distributed load in the whole bridge according to the idea of equivalent substitution. Finally， the results of this paper were applied to practical projects and the girder linear was well controlled. The validity of the calculation method in this paper.

Key words:continuous rigid frame bridge;sunshine temperature difference effect;two-time measurement-interpolation method;initialize height of girder;pre-camber

考虑日照温差效应的连续刚构桥悬浇施工立模标高确定研究_张飞.pdf