GFRP管约束钢骨混凝土构件受弯非线性分析  

Nonlinear flexural analysis for GFRP tube confinedsteel-reinforced concrete members

作　　者：樊成[1] 王家祥[1] 宋志刚 FAN Cheng;WANG Jia-xiang;SONG Zhi-gang(Research Center for Numerical Tests on Material Failure,Dalian University,Dalian 116622,China)

机构地区：[1]大连大学材料破坏力学数值试验研究中心,辽宁大连116622

出　　处：《沈阳工业大学学报》2021年第3期349-355,共7页Journal of Shenyang University of Technology

基　　金：辽宁省自然科学基金项目(2015020222).

摘　　要：为了研究玻璃纤维增强塑料管(GFRP)约束钢骨混凝土构件的受弯力学性能,采用ABAQUS软件建立组合构件的有限元模型,系统分析了纤维缠绕角度、剪跨比和混凝土强度等级对GFRP管约束钢骨混凝土构件受弯力学性能的影响,并建立承载力公式.结果表明:纤维缠绕角度、管壁厚度和剪跨比等对构件的受弯承载力影响较大,而混凝土强度等级对受弯承载力的影响较小;受弯承载力随GFRP管管壁厚度、纤维缠绕角度、混凝土强度等级和钢骨强度的增加呈线性增长,随着钢骨截面积的增加呈抛物线型增长,随剪跨比的增加呈抛物线型趋势下降,所得数值模拟计算结果与试验结果具有较好的一致性.In order to study the flexural performance of glass-fiber reinforced plastic(GFRP)tube confined steel-reinforced concrete members,a finite element model for the combined members was established with ABAQUS software,and the effect of such factors as the fiber winding angle,shear span ratio and concrete strength grade on the flexural performance of GFRP tube confined steel-reinforced concrete members was analyzed,and the flexural capacity formula was also established.The results show that the flexural capacity of members is greatly affected by such factors as the fiber winding angle,wall thickness of tube and shear span ratio.However,the concrete strength grade has weak effect on the flexural capacity.The flexural capacity shows a linear growth with the increasing wall thickness of GFRP tube,fiber winding angle,concrete strength grade and steel strength,and presents a parabolic growth with the increasing cross-sectional area of steel,and has a parabolic decrease with the increase of shear span ratio.The results of numerical calculation are in good agreement with the experimental measurements.

关 键 词：玻璃纤维增强塑料 有限元 力学性能 承载力 非线性 混凝土构件 受弯性能 

分 类 号：TU398[建筑科学—结构工程]