两端简支GFRP管-钢骨混凝土构件抗侧向冲击性能有限元分析  

Finite Element Analysis on Lateral Impact Resistance of GFRP Tube Concrete-encased steel Members with Simple Support at Both Ends

作　　者：张海霞[1] 杨帆 鞠士龙 陈欢 ZHANG Haixia;YANG Fan;JU Shilong;CHEN Huan(School of Civil Engineering,Shenyang Jianzhu University,Shenyang China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第1期59-69,共11页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52278196);国家自然科学基金重点项目(51938009)。

摘　　要：目的 研究两端简支GFRP管-钢骨混凝土构件的抗侧向冲击性能,为该类构件的工程应用提供参考。方法 建立并验证侧向冲击荷载作用下两端简支GFRP管-钢骨混凝土构件有限元模型,分析了典型构件在侧向冲击荷载作用下的全过程、破坏形态、应力发展、相互作用力时程曲线和弯矩时程曲线等动态响应;研究了冲击能量、冲击冲量、钢材强度、GFRP管厚度以及截面含钢率对构件抗冲击性能的影响。结果 随着冲击能量及冲量的增大,冲击持时和构件弯曲变形增大;提高钢材强度、GFRP管厚度可以改善构件的抗冲击性能。结论 GFRP管对混凝土有较好的约束作用,构件在侧向冲击荷载作用下整体发生弯曲破坏,内部钢骨塑性变形发展充分,构件抗侧向冲击性能优越。The lateral impact resistance of GFRP tube concrete-encased steel member was studied to provide reference for the application of the members in engineering.The finite element model of GFRP tube concrete-encased steel member with simple support at both ends under lateral impact loading was established.Based on the verified model,the dynamic responses of typical member under lateral impact load,such as the whole process,failure mode,stress development,time history curve of interaction force and bending moment,were analyzed.Furthermore,the influence of impact energy,impact impulse,steel strength,thickness of GFRP tube and steel ratio on the impact resistance behavior of the member were investigated.The results show that the impact force duration time and the bending deformation of the member increase with the increase of the impact energy and impact impulse.The impact resistance performance of the member can be improved by increasing the strength of steel and the thickness of GFRP tubes.GFRP tubes has a good restraint effect on concrete,and the overall bending failure occurs under the lateral impact load.The plastic deformation of the internal steel is fully developed,and the lateral impact resistance of the member is superior.

关 键 词：GFRP管 钢骨混凝土 两端简支 抗侧向冲击性能 影响因素 

分 类 号：TU391[建筑科学—结构工程]