套筒灌浆连接预制混凝土框架柱接头斜截面抗剪性能试验研究  

Experimental Study on Inclined Section Shear Resistance of Precast Concrete Frame Column Joint with Sleeve Grouting Connection

作　　者：薛伟辰[1] 雷杰 孙哲[1] XUE Weichen;LEI Jie;SUN Zhe(Department of Structural Engineering,Tongji University,Shanghai200092,China)

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《施工技术（中英文）》2024年第6期14-19,共6页Construction Technology

基　　金：国家重点研发计划(2022YFC3801400);上海市科学技术委员会科技计划(22dz1203100)。

摘　　要：套筒灌浆连接是预制混凝土框架结构中应用较广泛的连接方式。开展了6个套筒灌浆连接预制混凝土柱接头的抗剪试验,主要研究了轴压比(0,0.2,0.4,0.6)、混凝土强度等级(C30,C40,C50)对柱接头斜截面抗剪性能影响。研究表明:所有试件接头均发生斜截面剪切破坏,且斜截面破坏发生时接缝界面保持完好;柱接头抗剪承载力随着混凝土强度、轴压比的提高而增大;在轴压比0.4下,与C40试件相比,C30试件的抗剪承载力降低14%,C50试件的抗剪承载力提高13%;混凝土强度等级为C40时,轴压比为0,0.2试件的抗剪承载力分别比轴压比为0.4试件降低17%,8%,轴压比为0.6试件的抗剪承载力比轴压比为0.4试件提高7%;预制柱接头的初始刚度随轴压比的增大而增大。最后,基于试验结果,对中国GB 50010—2010《混凝土结构设计规范》(2015年版)、欧洲规范《Eurocode 2:Design of Concrete Structures》中混凝土柱接头斜截面抗剪承载力计算公式进行了评价。Sleeve grouting connection is the most widely used connection method in precast concrete frame structure.The effects of axial compression ratio(0,02,04,06)and concrete strength grade(C30,C40,C50)on the shear properties of precast concrete column joints with sleeve grouting were studied.The results show that oblique shear failure occurs in all specimens,and the interface joints remain intact when oblique shear failure occurs.The shear capacity of column joint increases with the increase of concrete strength and axial compression ratio.Under axial compression ratio 04,the shear strength of C30 specimen is reduced by 14%and that of C50 specimen is increased by 13%compared with C40 specimen.When the concrete strength grade is C40,the shear strength of specimens with axial compression ratio of 0 and 02 is 17%and 8%lower than that of specimens with axial compression ratio of 04,respectively,and the shear strength of specimens with axial compression ratio of 06 is 7%higher than that of specimens with axial compression ratio of 04.The initial stiffness of prefabricated column joint increases with the increase of axial compression ratio.Finally,based on the test results,the calculation formulas of inclined section shear capacity of concrete column joints in Code for design of concrete structures(GB 50010—2010)(2015 edition)and Eurocode 2:Design of Concrete Structures are evaluated.

关 键 词：预制混凝土柱 接头 套筒 灌浆 连接 抗震性能 承载力 

分 类 号：TU758.12[建筑科学—建筑技术科学]