任意内角多边形截面钢管混凝土约束区范围研究  

Study on the Range of Confinement Region of Concrete-filled Steel Tube with Arbitrary Inner Angle Polygon Section

作　　者：耿付月 刘勇 宋玉香 GENG Fuyue;LIU Yong;SONG Yuxiang(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《石家庄铁道大学学报(自然科学版)》2025年第1期77-83,共7页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家重点研发计划子课题(2018YFC0808704-2)。

摘　　要：为研究任意内角多边形截面钢管混凝土约束区范围,采用钢管混凝土统一强度理论,以正方形、正八边形截面钢管混凝土为基础,运用钢管混凝土抗压强度计算公式,通过考虑多边形截面钢管混凝土宽厚比、钢材强度、混凝土强度等因素,得到了多边形截面钢管混凝土内角与非有效约束区边切角关系,通过拟合得到边切角与其对应内角计算式,并用正十六边形、矩形截面钢管混凝土进行验证。研究结果表明,钢管宽厚比大于30时,混凝土抛物线边切角与多边形内角呈线性关系。In order to study the range of confinement region of concrete-filled steel tube with arbitrary inner corner polygon section,the unified strength theory of concrete-filled steel tube was adopted.Based on the concrete-filled steel tube with square and regular octagonal sections,the calculation formula of compressive strength of concrete-filled steel tube in the specification was used.By considering factors such as the width-to-thickness ratio,steel strength and concrete strength of polygonal section concrete-filled steel tube,the relationship between the inner angle of polygonal section concrete-filled steel tube and the edge cutting angle of non-effective restrained zone was obtained.The calculation formula of edge cutting angle and its corresponding inner angle was obtained by fitting and verified by regular hexagon and rectangular section concrete-filled steel tube.The results show that when the width-to-thickness ratio of steel tube is greater than 30,the parabolic edge angle of concrete has a linear relationship with the inner angle of polygon.

关 键 词：多边形钢管混凝土 统一强度理论 混凝土约束区 抗压强度 

分 类 号：TU398[建筑科学—结构工程]