圆端形不锈钢-混凝土-碳素钢组合柱双向偏压性能研究  

Mechanical Behavior of Round-Ended Stainless Steel-Concrete-Carbon Steel Composite Columns Under Biaxial Eccentric Compression

作　　者：谢恩普 鲍依蓓 王志滨[3] 黄昆[1] 张宪江[1] XIE Enpu;BAO Yibei;WANG Zhibin;HUANG Kun;ZHANG Xianjiang(Institute of Civil Engineering,Huzhou Vocational and Technical College,Huzhou 313000,China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,China;Huzhou Key Laboratory of Green Building Technology,Huzhou Vocational and Technical College,Huzhou 313000,China)

机构地区：[1]湖州职业技术学院建筑工程学院,浙江湖州313000 [2]湖州职业技术学院湖州市绿色建筑技术重点实验室,福州350116 [3]福州大学土木工程学院,浙江湖州313000

出　　处：《建筑钢结构进展》2022年第4期32-38,共7页Progress in Steel Building Structures

基　　金：湖州市自然科学基金(2019YZ08);浙江省高等学校访问工程师项目(FG2019124);福建省自然科学基金(2017J01696)。

摘　　要：圆端形钢管混凝土已被应用在沿海城市的桥梁工程中,该类结构耐腐蚀性差和自重大,圆端形不锈钢-混凝土-碳素钢组合柱可解决以上问题。采用ABAQUS对圆端形不锈钢-混凝土-碳素钢组合柱的双向偏压性能进行了分析研究。结果表明:在双向偏压作用下,圆端形不锈钢-混凝土-碳素钢组合柱承载力较高、延性较好。内、外钢管对混凝土均有较好的约束作用,其中外层钢管对混凝土的约束作用比内层钢管的约束作用更强,约束作用主要集中在圆弧段。随着轴向压力的增加,构件抗弯承载力下降,由于圆弧段具有更强的约束作用,使得构件绕强轴的抗弯承载力下降程度比绕弱轴的抗弯承载力下降程度小。建议的双向偏压作用下的简化公式,与有限元计算结果相比简化公式计算得出的结果精确性较高。The round-ended concrete filled steel tubular columns have been used in coastal city bridge engineering;the flaws include low corrosion resistance and large self-weight,which may be remedied by round-ended stainless steelconcrete-carbon steel composite(RESCC)columns.ABAQUS is used to perform the study on RESCC columns under biaxial eccentric compression.The analytical results show that the RESCC columns have strong bearing capacity and exceptional ductility under biaxial eccentric compression.The inner and outer steel tubes have good confinement effects on concrete,with the one supplied by the outer steel tube being stronger than that provided by the inner steel tube,which is mostly dispersed in the arc segment.The bending capacity of the RESCC columns reduces as the axial pressure increases.Because of the stronger confinement effects in the arc segment,the drop in bending capacity in the main strength direction is smaller than that in the minor strength direction.A simpler formula for RESCC columns is presented,which has high accuracy when compared to finite element results.

关 键 词：组合柱 不锈钢 双向偏压 简化公式 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程]