钢桁腹混凝土组合梁挠度计算方法研究

doi:10.3969/j.issn.1674-0696.2022.06.10

重庆交通大学学报（自然科学版） ›› 2022, Vol. 41 ›› Issue (06): 66-72.DOI: 10.3969/j.issn.1674-0696.2022.06.10

钢桁腹混凝土组合梁挠度计算方法研究

陈建兵1,蒋明利1,周晨2,匡冠桦1

(1. 苏州科技大学土木工程学院，江苏苏州 215011； 2. 中交一公局第二工程有限公司，江苏苏州 215011)

收稿日期:2020-11-03 修回日期:2020-11-26 发布日期:2022-06-22
作者简介:陈建兵（1968—），男，河南汝南人，教授，主要从事桥梁结构方面的研究。E-mail:szctt2009@163.com 通信作者：蒋明利（1994—），男，安徽宿州人，硕士研究生，主要从事桥梁结构设计方面的研究。E-mail:1067122287@qq.com
基金资助:
江苏省研究生科研与实践创新计划项目（SJCX19_0843）；苏州市建设系统科研项目（2020-4）

Calculation Method of Deflection of Steel Truss Web Concrete Composite Beam

CHEN Jianbing1, JIANG Mingli1, ZHOU Chen2, KUANG Guanhua1

(1. School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, Jiangsu, China; 2. The Second Engineering Co., Ltd., of China Communications First Public Bureau, Suzhou 215011, Jiangsu, China)

Received:2020-11-03 Revised:2020-11-26 Published:2022-06-22

摘要/Abstract

摘要： 为了研究钢桁腹混凝土组合梁在竖向荷载下的变形性能，考虑钢桁腹杆的剪切变形，引入钢桁腹混凝土组合梁剪切变形位移函数，利用Timoshenko梁理论与能量变分原理，推导出钢桁腹混凝土组合梁在不同加载工况下的挠度计算方程。结合ABAQUS有限元分析算例，对比分析简支钢桁腹混凝土组合梁在不同加载工况下的挠度值。研究结果表明：钢桁腹混凝土组合梁挠度计算公式的结果与有限元分析值吻合良好；剪切变形和弯曲变形对钢桁腹混凝土组合梁的挠度影响在98%以上，剪力滞效应产生的附加挠度仅有1.2%左右。

关键词: 桥梁工程；钢桁腹；剪切变形；剪力滞效应；能量变分法；挠度

Abstract: In order to study the deformation performance of the steel truss web concrete composite beam under vertical load, the shear deformation of the steel truss web member was considered, the shear deformation displacement function of the steel truss web concrete composite beam was introduced and the Timoshenko beam theory and the energy variation principle were used, to derive the deflection calculation equation of steel truss web concrete composite beam under different loading conditions. Combined with the ABAQUS finite element analysis example, the deflection values of the simply supported steel truss web concrete composite beam under different loading conditions were compared and analyzed. The research results show that the results of the deflection calculation formula for steel truss web concrete composite beams agree well with the finite element analysis values. The influence of shear and bending deformation on the deflection of steel truss web concrete composite beams is over 98%, and the additional deflection caused by the shear lag effect is only about 1.2%.

Key words: bridge engineering; steel truss web; shear deformation; shear lag effect; energy variation method; deflection

中图分类号:

U448.213

陈建兵1,蒋明利1,周晨2,匡冠桦1. 钢桁腹混凝土组合梁挠度计算方法研究[J]. 重庆交通大学学报（自然科学版）, 2022, 41(06): 66-72.

CHEN Jianbing1, JIANG Mingli1, ZHOU Chen2, KUANG Guanhua1. Calculation Method of Deflection of Steel Truss Web Concrete Composite Beam[J]. Journal of Chongqing Jiaotong University(Natural Science), 2022, 41(06): 66-72.

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钢桁腹混凝土组合梁挠度计算方法研究

Calculation Method of Deflection of Steel Truss Web Concrete Composite Beam

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