不同叠合面超高性能混凝土叠合板延性与抗弯刚度试验  

Experiment of Ductility and Bending Stiffness of Ultra-High Performance Concrete Laminated Plates with Different Laminated Surfaces

作　　者：万冬伟 陈璇 金凌志[3] WAN Dongwei;CHEN Xuan;JIN Lingzhi(Capital Construction Division,Guilin University of Electronic Technology,Guilin 541004,China;Audit Office,Guilin University of Aerospace Technology,Guilin 541004,China;Guangxi Key Laboratory of Geomechanics&Geomechanical Engieering,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学基建处,广西桂林541004 [2]桂林航天工业学院审计处,广西桂林541004 [3]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004

出　　处：《河南科技大学学报（自然科学版）》2020年第1期42-48,M0005,共8页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51368013);广西重点实验室基金项目(2015-A-02)

摘　　要：为了研究不同叠合面对超高性能混凝土(UHPC)叠合板延性与抗弯刚度的影响,用3块不同叠合面UHPC叠合板进行了抗弯试验。试验结果表明:人工粗糙叠合面能满足UHPC叠合板叠合面的抗剪要求。设置叠合面抗剪钢筋会降低UHPC叠合板的位移延性与耗能延性,马镫钢筋较桁架钢筋的影响作用更大,同时能有效提高UHPC叠合板加载前期的抗弯刚度,但对加载中后期的抗弯刚度影响不大。UHPC叠合板使用阶段(0.5 M u^0.7 M u)的短期刚度,与钢纤维混凝土叠合板的计算短期刚度吻合良好,建议可按钢纤维混凝土叠合板短期刚度计算公式进行计算。In order to study the effect of different laminated surfaces on ductility and flexural stiffness of ultrahigh performance concrete(UHPC) laminated plates,bending tests of three UHPC laminated plates with different laminated surfaces were carried out. The test results show that the artificial rough laminated surfaces meet the shear resistance requirements of UHPC laminated plates. The displacement ductility and energy dissipation ductility of UHPC laminated plates are reduced by setting shear-resistant steel bars with laminated surfaces,and the influence of stirrups is greater than that of trusses.The bending stiffness of UHPC laminated plates in early loading period is effectively improved by setting shear-resistant steel bars with laminated surfaces,and there is little effect on the bending stiffness in the middle and late loading period.The short-term stiffness of UHPC laminated plates(0. 5 M_u~ 0. 7 M_u) is in good agreement with the calculated short-term stiffness of steel fiber reinforced concrete laminated plates. It is suggested that the short-term stiffness of steel fiber reinforced concrete laminated plate can be calculated according to its short-term stiffness formula.

关 键 词：叠合面 超高性能混凝土 叠合板 延性 抗弯刚度 

分 类 号：TU375[建筑科学—结构工程]