摘要
采用连续强度法,考虑钢梁应变强化作用,并基于平截面假定,对完全剪力连接的钢-混简支组合梁进行弹塑性分析,提出相应的抗弯承载力计算方法和公式;通过3片钢-混简支组合梁抗弯全过程加载试验,掌握其弯曲破坏模式和破坏特征,同时获得变形和应变等关键试验结果;采用ABAQUS有限元软件建立试验梁非线性分析模型,并结合本文及其他文献的试验结果,对本文计算公式的精度和适用性进行验证,理论结果与有限元分析结果、试验结果吻合良好。研究结果表明:与规范结果相比,考虑钢梁应变强化效应对钢-混组合梁抗弯承载力提升7%左右,规范公式偏于保守;本文计算公式可以很好地预测完全剪力连接钢-混简支组合梁的抗弯承载力,可以在实际工程中应用。
In this paper,the continuous strength method was adopted to consider the strain strengthening effect of steel beam,and based on the assumption of plane section,the elastic-plastic analysis of steel-concrete simply supported composite beam with full shear connection was carried out,and the corresponding calculation method and formula of flexural capacity were put forward.The bending failure mode and failure characteristics of three pieces of steel-concrete composite test beams have been mastered and the key test results such as deformation and strain have been obtained at the same time.The nonlinear analysis model of the test beam was established by using the ABAQUS finite element software.The accuracy and applicability of the formula in this paper were verified by combining the experimental results of this paper and other literatures,and the results of theory calculation were in good agreement with the results of the finite element analysis and experiment.The results show that Compared with the results of the code, considering the strain strengthening effect of steel beam, theflexural capacity of steel-concrete composite beam is increased by about 7%, and the criterion formula isconservative. The formula proposed in this paper can well predict the flexural capacity of steel-concrete simplysupported composite beams with full shear connections, and can be applied in practical engineering.
作者
李立峰
王孝亮
冯威
石雄伟
LI Lifeng;WANG Xiaoliang;FENG Wei;SHI Xiongwei(College of Civil Engineering,Hunan University,Changsha 410092,China;Key Laboratory for Wind and Bridge Engineering of Hunan Province,Changsha 410082,China;Xi’an Highway Institute of the Shaanxi Province,Xi’an 710065,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2019年第11期2822-2831,共10页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51978257)
陕西省交通厅科研课题资助项目(17-19K)
云南省交通厅科研课题资助项目(2017-104)
关键词
钢-混组合梁
钢梁应变强化
抗弯承载力
模型试验
有限元模型
steel-concrete composite beam
strain strengthening of steel beam
flexural capacity
model test
finie element model
