[1]高 丽,周 媛,等.波形钢腹板PC箱梁剪力滞效应的能量变分法解[J].西安建筑科技大学学报(自然科学版),2022,(01):27-34.[doi:10.15986/j.1006-7930.2022.01.004 ]
 GAO Li,ZHOU Yuan,WANG Sheliang,et al.Energy-variational method of shear-lag effect in PC box-girder with corrugated steel webs[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2022,(01):27-34.[doi:10.15986/j.1006-7930.2022.01.004 ]
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波形钢腹板PC箱梁剪力滞效应的能量变分法解()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
期数:
2022年01期
页码:
27-34
栏目:
出版日期:
2022-02-28

文章信息/Info

Title:
Energy-variational method of shear-lag effect in PC box-girder with corrugated steel webs
文章编号:
1006-7930(2022)01-0027-08
作者:
高 丽1周 媛2 3王社良2刘 博4
(1.淮阴工学院 计算机与软件工程学院,江苏 淮安 223003; 2.西安建筑科技大学 土木工程学院,陕西 西安 710055; 3.长安大学 理学院,陕西 西安 710061; 4.中铁二十局集团有限公司,陕西 西安 710016)
Author(s):
GAO Li1ZHOU Yuan2 3WANG Sheliang2LIU Bo4
(1.Faculty of Computer and Software Engineering, Huaiyin Institute of Technology, Huai'an 223003, China; 2.School of Civil Engineering, Xi'an Univ. of Arch. & Tech., Xi'an 710055,China; 3.College of Science, Chang'an University, Xi'an 710061, China; 4.China Railway 20th Bureau Group Co.,Ltd, Xi'an 710016, China)
关键词:
波形钢腹板 变分原理 剪力滞 有限元 参数分析
Keywords:
corrugated steel webs variation principle shear lag FEM parametric analysi
分类号:
TU391; U448. 38
DOI:
10.15986/j.1006-7930.2022.01.004
文献标志码:
A
摘要:
为研究波形钢腹板预应力混凝土箱梁的剪力滞效应,引入β次曲线和近似余弦函数,根据变分原理推导出了简支梁和悬臂梁结构在典型荷载工况下的剪力滞系数计算公式,运用叠加法和肢解法将剪力滞计算方法推广应用到超静定桥梁的剪力滞系数求解中.采用有限元分析软件ANSYS和MIDAS/FEA建立波形钢腹板预应力混凝土箱梁空间模型,通过对比有限元计算结果,对能量变分解析方法进行了验证.对波形钢腹板PC箱梁开展了参数分析,得到了剪力滞系数随钢腹板厚度和宽跨比变化规律.研究结果表明:剪力滞系数值随纵向翘曲位移函数阶次的增加而增大,不宜引入高阶函数来求解波形钢腹板PC箱梁剪力滞问题; 悬臂箱梁的剪力滞系数随着宽跨比增大显著升高,均布荷载下的剪力滞系数比集中荷载下要大; 运用叠加法和肢解法解超静定桥梁的剪力滞问题简单高效,结果可靠.
Abstract:
In order to investigate the shear lag effect of prestressed concrete box girder with corrugated steel webs, β power curve and approximate cosine function were introduced, and the calculation formula of the shear lag coefficient of simple-supported beam bridge and cantilever girder bridge under typical load conditions was deduced according to the variational principle, and then the formula was extended to solve the shear lag coefficient in statically indeterminate bridges by the method of superposition or dismemberment. By means of the finite element software ANSYS and MIDAS/FEA, the corresponding 3D model was established, and the method of energy variational analysis was verified by comparing the results with the theoretical values in the paper. The geometric parameters affecting the shear lag effect of box birder were analyzed, and the variation of shear lag coefficient with steel web thickness and width span ratio was obtained. The results show that the shear lag coefficient increases with the increase of the order of the longitudinal warping displacement function, and it is not suitable to adopt the high-order function to solve the shear lag problem of PC box girder with corrugated steel webs; the shear lag coefficient of cantilever box girder increases with the increase of width-span ratio, and the shear lag coefficient under uniform load is larger than that under concentrated load. The study proves that the method of dismemberment or superposition is simple and efficient to settle the shear lag effect of statically indeterminate bridges, and the results are reliable.

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相似文献/References:

[1]冀 伟,刘世忠,蔺鹏臻.等截面波形钢腹板连续箱梁竖向基频的参数研究[J].西安建筑科技大学学报(自然科学版),2012,(04):468.[doi:10.15986/j.1006-7930.2012.04.003]
 JI Wei,LIU Shi-zhong,LIN Peng-zhen.Study on dynamic characteristics parameters of equal section composite box girder with corrugated steel webs[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2012,(01):468.[doi:10.15986/j.1006-7930.2012.04.003]

备注/Memo

备注/Memo:
收稿日期:2021-05-27修改稿日期:2021-12-25
基金项目:国家自然科学基金(51678480)
第一作者:高 丽(1976-),女,博士,讲师,研究方向:结构振动控制. E-mail:ggll30662@163.com 通信作者:王社良(1956-),男,教授,博导,研究方向:新型智能材料及其在结构振动控制中的应用.E-mail:sheliangw@163.com

更新日期/Last Update: 2022-02-20