桁架式配筋打印混凝土梁力学性能试验研究  

EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF PRINTED TRUSS-TYPE REINFORCED CONCRETE BEAM

作　　者：武雷[1] 康强 万志明 WU Lei;KANG Qiang;WAN Zhiming(School of Civil Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《工业建筑》2021年第6期24-28,共5页Industrial Construction

基　　金：国家重点研发计划资助项目(2018YFC0705800)。

摘　　要：混凝土打印工艺的要求使得梁构件无法配置箍筋,为此设计了不同桁架式配筋的打印混凝土梁构件,并对其进行静力加载试验。对不同桁架数、不同纵筋尺寸的打印混凝土梁分别进行了正截面破坏试验和斜截面破坏试验,研究了桁架式配筋打印混凝土梁在静力加载下正截面与斜截面的破坏特征、荷载与挠度曲线。试验表明,适筋破坏的桁架式配筋打印混凝土梁正截面抗弯承载力与参照普通混凝土单筋矩形截面梁的计算承载力相近,但桁架的腹筋提高了梁的整体刚度;桁架腹杆筋向支座弯起部位的斜截面抗剪承载力与按普通混凝土弯起钢筋部位斜截面计算承载力相差较大。The requirements of concrete printing technique make it impossible to install stirrups in beam members.Therefore,printed concrete beam members with different truss-type reinforcements were designed,and static loading tests were carried out.Normal section and oblique section failure tests of printed concrete beams with different truss numbers and sizes were carried out respectively.The failure characteristics,load-deflection curves under static load were studied.The test results showed that the flexural capacity of the printed truss-type reinforced concrete beam with appropriate reinforcement was similar to that of the concrete beam with single reinforcement,but the abdominal reinforcement of the truss improved the stiffness of the beam.There was a big difference between the shear bearing capacity of the oblique section of the bending area of printed truss-type reinforced support and the calculated bearing capacity of the oblique section of reinforced normal concrete where the reinforcement was bent.

关 键 词：3D打印混凝土 桁架式配筋 斜截面承载力 正截面承载力 

分 类 号：TU37[建筑科学—结构工程]