钢-UHPC组合梁受弯性能非线性分析  

Nonlinear analysis of flexural behavior for steel-UHPC composite girders

作　　者：王洪国 龙关旭 徐传昶 朱经纬 宋秀豪 WANG Hongguo;LONG Guanxu;XU Chuanchang;ZHU Jingwei;SONG Xiuhao(Shandong Hi-speed Construction Management Group Co.,Ltd.,Jinan 250099,China;Innovation Research Institute of Shandong Hi-Speed Group Co.,Ltd.,Jinan 250000,China;Shandong Hi-Speed Engineering Testing Co.,Ltd.,Jinan 250002,China;School of Traffic Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东高速建设管理集团有限公司,山东济南250099 [2]山东高速集团有限公司创新研究院,山东济南250000 [3]山东高速工程检测有限公司,山东济南250002 [4]山东建筑大学交通工程学院,山东济南250101

出　　处：《山东建筑大学学报》2022年第5期37-43,共7页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(51908337);山东省交通运输厅科技计划项目(2017B40)。

摘　　要：钢-UHPC组合梁受弯性能的非线性分析是掌握其受弯性能的关键手段。文章依据超高性能钢纤维混凝土UHPC损伤塑性本构关系,采用有限元软件建立了钢-UHPC组合梁非线性数值模型,通过全过程破坏力学性能对比验证了数值模型的适用性,并进一步分析了构造尺寸、材料强度参数变化对钢-UHPC组合梁受弯性能的影响规律。结果表明:所建立的钢-UHPC组合梁的损伤力学模型能够较好地模拟钢-UHPC组合梁地全过程受弯破坏行为;钢-UHPC组合梁的极限承载力随钢材屈服强度的提高最为显著,随钢梁翼缘宽度、腹板厚度、UHPC翼板厚度的增大有一定提高,而随UHPC强度等级的增大提高较小;其延性性能随UHPC强度等级的增大而显著提高,随钢材屈服强度、腹板厚度、钢梁翼缘宽度的增大而显著降低。The nonlinear analysis of flexural behavior for steel-UHPC composite girders is a key mean to master their flexural behavior.This paper,according to the damaged plastic constitutive relation of UHPC and by using the finite element software ABAQUS,establishes a nonlinear numerical model of steel-UHPC composite girders,verifies the applicability of the numerical model by comparing damage mechanical properties in the whole process,and analyses the influence of parameter variation of structural sizes and material strength on the flexural behavior of steel-UHPC composite girders.The results show that the model of damage mechanics of the steel-UHPC composite girders can simulate accurately the whole flexural damage behavior of steel-UHPC composite girders.The ultimate flexural strength of steel-UHPC composite girders increases significantly with the increase of the yield strength of steel,and increases to some extent with the increase of flange width,web thickness of the steel beam and UHPC flange thickness,but increases slightly with the increase of UHPC strength grade.The ductility of steel-UHPC composite girders improves significantly with the increase of UHPC strength grade,whereas decreases significantly with the increase of the yield strength of steel,web thickness and flange width of the steel beam.

关 键 词：钢-UHPC组合梁 损伤塑性模型 非线性有限元分析 极限抗弯承载力 

分 类 号：TU528.31[建筑科学—建筑技术科学]