# [1]王毅,叶见曙.温度梯度对混凝土曲线箱梁影响的计算方法[J].东南大学学报(自然科学版),2005,35(6):924-929.[doi:10.3969/j.issn.1001-0505.2005.06.021] 　Wang Yi,Ye Jianshu.Computing method of effect of thermal gradient on concrete curved box-girders[J].Journal of Southeast University (Natural Science Edition),2005,35(6):924-929.[doi:10.3969/j.issn.1001-0505.2005.06.021] 点击复制 温度梯度对混凝土曲线箱梁影响的计算方法() 分享到： var jiathis_config = { data_track_clickback: true };

35

2005年第6期

924-929

2005-11-20

## 文章信息/Info

Title:
Computing method of effect of thermal gradient on concrete curved box-girders

Author(s):
College of Transportation, Southeast University, Nanjing 210096, China

Keywords:

U441.5
DOI:
10.3969/j.issn.1001-0505.2005.06.021

Abstract:
Since the computing method for effect of thermal gradient on concrete curved box-girders is hard to be applied to preliminary design and structure estimation, geometric relation of a differential curved box-girder segment is studied by using the pure torsion theory and the fundamental differential equation of concrete curved box-girders with thermal gradient action is deduced. Through solving the differential equation, a convenient method for computing the effect of thermal gradient on concrete curved box-girders is put forward by using an individual span with one degree of torsion indeterminacy as simple structure. The research shows that the ratio between bending rigidity and torsional rigidity of box-girder has great effect on counter-torque of supports, whereas it has little effect on counter-force. The supports counter-torque and counter-force of concrete curved box-girders with 2, 3 and 4 spans arranged in one continuous unit were calculated. Through the comparison with the results of FEA(finite element analysis), the error of calculated results are less than 5%. It proves that the precision of this method meets the engineering calculation requirement.

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