预制UHPC永久模板钢筋混凝土组合梁抗剪性能有限元分析  

Finite Element Analysis of Anti-shear Performance of Prefabricated UHPC Permanent Formwork Reinforced Concrete Composite Beam

作　　者：赵柏冬[1] 张一鹏 刘慈军 刘亚钊 ZHAO Baidong;ZHANG Yipeng;LIU Cijun;LIU Yazhao(Shenyang University,Shenyang,Liaoning 110044,China;Ningbo High-grade Highway Construction Management Center,Ningbo,Zhejiang 315000,China)

机构地区：[1]沈阳大学,辽宁沈阳110044 [2]宁波市高等级公路建设管理中心,浙江宁波315000

出　　处：《黑龙江交通科技》2024年第4期100-104,共5页Communications Science and Technology Heilongjiang

基　　金：宁波市交通运输局科技计划项目(202211)。

摘　　要：为了研究预制超高性能混凝土永久模板钢筋混凝土组合梁抗剪性能,选取合适的U型UHPC预制单元本构关系,建立了钢筋混凝土梁的有限元永久模型,并与已有的试验数据进行比较,验证了模型的可靠性,并分析配箍率、剪跨比等参数对超高性能混凝土组合梁抗剪性能的影响。结果显示:超高性能混凝土预制单元可显著提高斜向开裂荷载和极限荷载;预制单元会限制箍筋的作用,所以配箍率对组合梁影响小;剪跨比对组合梁抗剪性能影响大,但是和配箍率一样都会影响其延性。In order to study the shear performance of precast reinforced concrete composite beam,select the appropriate U-type UHPC precast unit constitutive relationship,establish the finite element permanent model of reinforced concrete beam,and compare with the existing test data,verify the reliability of the model,and analyze the hoop rate,shear span ratio on the shear performance of high performance concrete composite beam.The results show that the UHPC precast unit can significantly improve the oblique cracking load and limit load;the precast unit can limit the effect of the stirrup,so the hoop rate has little impact on the combined beam;the shear span ratio affects the shear performance of the combined beam,but it affects the ductility.

关 键 词：超高性能混凝土 组合梁 预制单元 配箍率 剪跨比 

分 类 号：TU375.1[建筑科学—结构工程]