摘要
为探讨型钢混凝土在地铁车站转换梁的工程应用,在双工字钢型钢混凝土转换梁试件受剪试验研究的基础上,采用ABAQUS软件建立了转换梁的有限元模型,并对转换梁的抗剪性能进行了非线性分析,获取了转换梁的应力云图和荷载-位移骨架曲线;将转换梁的计算结果与试验结果进行比较,验证该转换梁有限元模型的合理性,进一步分析了设计参数对该转换梁抗剪性能的影响规律。研究表明:转换梁在受力过程中经历初裂、裂缝开展、破坏三个阶段,最终呈现出典型的剪切破坏特征;与传统钢筋混凝土转换梁相比,双工字钢型钢混凝土转换梁具有较高的承载能力和良好的延性;随着剪跨比的增大,转换梁的承载能力降低,但延性略有增强;增大型钢配钢率可显著提高转换梁的承载力和变形能力;另外,提高钢材和混凝土的材料强度,对于转换梁的抗剪承载力是有利的。
To discuss the engineering application of steel reinforced concrete in the transfer beam of subway station,based on the shear performance tests on the specimens of twin I-shaped steel reinforced concrete transfer beams,the finite element model of the transfer beams were established by using ABAQUS software in the study,and the shear performance of transfer beams were analyzed nonlinearly.The stress nephogram and load-displacement curves of transfer beams ware obtained.The calculation results of transfer beams were compared with the test results,so as to verify the rationality on the finite element model of transfer beams,and the influence of design parameters on the shear performance resistance of transfer beams was also analyzed.The research showed that the transfer beams went though underwent three stages of the initial crack,crack development and failure,and finally presented typical shear failure characteristics.Compared with the traditional reinforced concrete transfer beams,the twinle I-steel reinforced concrete transfer beams had higher bearing capacity and good ductility.With the increase of shear-span ratio,the bearing capacity of transfer beams decreased,but the ductility increased slightly.The bearing capacity and deformation capacity of transfer beams could be significantly improved by increasing the steel ratio of profile section steel.In addition,improving the material strength of steel and concrete was beneficial to the shear bearing capacity of transfer beams.The research results can provide technical support for the engineering application of double I-shaped steel reinforced concrete transfer beams in the subway station.
作者
王磊
WANG Lei(China Railway First Survey and Design Institute Group Co.,Urban Rail Transit Design and Research Institute Ltd.,Xi’an 710043,China)
出处
《工业建筑》
北大核心
2023年第11期125-130,116,共7页
Industrial Construction
基金
中铁第一勘察设计院集团有限公司科研项目(院科19-57)
陕西省自然科学基础研究计划项目(2022JM-258)。
关键词
地铁车站
转换梁
双工字钢型钢混凝土
抗剪性能
数值模拟
subway station
transfer beam
twin I-steel reinforced concrete
shear perfomance
numerical simulation
