八角形中空钢管混凝土组合柱轴压力学性能  

Mechanical Properties of Octagonal Hollow Concrete Filled Steel Tube Short Columns Under Axial Compression

作　　者：张颖[1] 王蕊[1] 赵晖[1] 安国青 ZHANG Ying;WANG Rui;ZHAO Hui;AN Guoqing(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学土木工程学院,太原030024

出　　处：《工业建筑》2022年第5期113-119,共7页Industrial Construction

基　　金：中国博士后科学基金(2020M670656)。

摘　　要：通过对八角形中空钢管混凝土组合柱与八角形中空钢筋混凝土柱对比试件进行了轴心受压试验与有限元分析,重点研究了八角形中空钢管混凝土组合柱的试验现象、试验全曲线、受力全过程以及试件各部分接触作用,并基于修正的GB 50010—2010《混凝土结构设计规范》计算并对比分析了试件的承载力与轴压刚度。结果表明:轴压荷载作用下,混凝土、纵筋与内钢板能够协同工作;中空方形高强RC短柱表现出较高的承载力和刚度;截面尺寸与混凝土强度对构件承载力、轴压刚度和延性影响显著,内钢板厚度对其承载力、刚度和延性影响不明显;采用修正的《混凝土结构设计规范》对该类构件承载力预测结果较为保守,对轴压刚度预测较好。The mechanical properties of specimens, including the octagonal hollow concrete short columns with inner steel plate and the columns with inner longitudinal steel, were experimentally and numerically investigated under axial compression. The experimental phenomena, the whole test curves, the whole process of stress and the stress contact between each component were emphatically analyzed. The bearing capacity and the stiffness under axial compression obtained from tests were also compared with those calculated by using the revised Code for Design of Concrete Structures(GB 50010—2010). The results showed that the concrete, longitudinal bars and inner steel plates could work together under axial compression. The square high-strength hollow RC short columns showed high load-bearing capacity and stiffness. The sectional dimensions and concrete strength had significant influence on the bearing capacity, stiffness and ductility of the members. However, the thickness of inner steel plate had little influence. The predicted bearing capacity based on the revised GB 50010—2010 was conservative compared to the test results, while the prediction of the stiffness agreed well.

关 键 词：中空高强钢筋混凝土(RC)柱 内钢板 轴压性能 有限元分析 计算公式 

分 类 号：TU398.9[建筑科学—结构工程]