玻璃纤维增强复合材料-钢组合桁架梁的力学性能  

Mechanical properties of glass fiber reinforced composite steel composite truss beam

作　　者：苗璐璐 屈青山[2] MIAO Lulu;QU Qingshan(School of Information Technology and Urban Construction,Luoyang Polytechnic,Luoyang 471000,China;Institute of Architectural Engineering,Huanghuai University,Zhumadian 463000,China)

机构地区：[1]洛阳职业技术学院信息技术与城建学院,河南洛阳471000 [2]黄淮学院建筑工程学院,河南驻马店463000

出　　处：《兵器材料科学与工程》2023年第1期68-73,共6页Ordnance Material Science and Engineering

基　　金：河南省重点研发与推广专项(222102320258);河南省高等学校重点科研项目(20B480004);洛阳职业技术学院青年教师科研培育基金项目(QNPY201913)。

摘　　要：为分析玻璃纤维增强复合材料-钢组合桁架梁的力学性能,以GFRP和Q345钢为原料,制备由上、下弦杆、斜腹杆及上、下横联组成的4种不同方案的GFRP-钢组合桁架梁构件(方案1~4)。用Abaqus构建不同方案GFRP-钢组合桁架梁的有限元模型,通过应力云图分析其应力变化,通过均布堆载加载方式进行构件加载试验,分析GFRP-钢组合桁架梁构件力学性能。结果表明:基础载荷下方案4桁架梁变形最大、方案3桁架梁变形最小;4.14 kPa载荷下,方案3的桁架梁上、下弦杆的最大拉、压应力最小,不易变形;方案3跨中挠度、上、下弦杆应变、GFRP侧和钢侧的挠度在4种方案中最小,几乎不受温度、湿度等影响;综上可知,以上、下弦杆和腹杆为钢,上、下横联为GFRP结构的钢组合桁架梁力学性能最佳。In order to analyze the mechanical properties of glass fiber reinforced composite steel composite truss beam,GFRP steel composite truss beam members(schemes 1-4)consisting of upper and lower chords,diagonal webs and upper and lower transverse connections were prepared with GFRP and Q345 steel as raw materials.Abaqus was used to build finite element models of GFRP steel composite truss beams in different schemes,analyze their stress changes through stress nephogram,and conduct member loading tests through uniformly distributed surcharge loading to analyze the mechanical properties of GFRP steel composite truss beams.The results show that the deformation of truss beam in scheme 4 is the largest and that in scheme 3is the smallest under basic load.Under the load of 4.14 kPa,the maximum tensile and compressive stress of the upper and lower chords of the truss beam are the lowest in scheme 3,which is not easy to deform.The mid span deflection,upper and lower chord strains,GFRP side and steel side deflections of scheme 3 are the smallest among the four schemes,and are almost not affected by temperature and humidity.In conclusion,the steel composite truss beam with the upper and lower chords and webs of steel and the upper and lower transverse connections of GFRP structure has the best mechanical performance.

关 键 词：GFRP-钢组合 桁架梁 力学性能 有限元模型 上、下弦杆 应力云图 

分 类 号：TU311[建筑科学—结构工程]