矩形钢管混凝土翼缘的H型蜂窝组合柱特征值屈曲性能  

Eigenvalue buckling analysis of H type honeycombed composite column with rectangular concrete-filled steel tube flanges

作　　者：计静[1] 徐智超[1] 张文福[1,2] 沈晶[3] 周利剑[1] 刘迎春[1] 卢召红[1] 王滨洲 

机构地区：[1]东北石油大学黑龙江省防灾减灾工程与防护工程高校重点实验室,黑龙江大庆163318 [2]南京工程学院建筑工程学院,江苏南京211167 [3]大庆油田有限责任公司第二采油厂,黑龙江大庆163414 [4]中国石油天然气股份有限公司东北销售分公司,辽宁沈阳110013

出　　处：《东北石油大学学报》2017年第1期106-116,共11页Journal of Northeast Petroleum University

基　　金：教育部高等学校博士学科点专项科研基金项目(新教师类:20122322120004);国家自然科学基金项目(51178087);国家自然科学基金东北石油大学校培育基金项目(NEPUPY-1-16;NEPUQN2014-25);黑龙江省自然科学基金面上项目(E201336);黑龙江省级领军人才梯队后备带头人资助(RCHB-6);中国石油科技创新基金项目(2016D-5007-0608);东北石油大学校级研究生创新科研项目(YJSCX2016-031NEPU);黑龙江省教育厅科研专项经费东北石油大学优势科研方向凝练基金项目(2016YSFX-02)

摘　　要：为研究矩形钢管混凝土翼缘的H型蜂窝组合柱(STHCC)稳定性能,以截面形式、约束条件、构件长度和混凝土强度等级为主要参数,设计11根不同截面形式的H型蜂窝钢柱及18根STHCC构件;基于构件的简化力学模型和本构模型,利用ABAQUS有限元软件建立29根试件的有限元模型,开展构件的特征值屈曲分析,将有限元数值解与实验数据进行对比,两者吻合较好,验证有限元建模方法的合理性。基于18根STHCC构件特征值屈曲分析,提取变形云图和屈曲荷载,考察屈曲荷载随截面形式、构件长度、约束方式、混凝土强度等级和加劲肋的变化规律,给出STHCC在实际工程中的设计建议。结果表明:STHCC构件的整体稳定性比普通H型蜂窝钢柱、钢管翼缘的H型蜂窝钢柱的好,在相同用钢量条件下,屈曲荷载分别提高1.88、1.23倍;在STHCC构件钢管翼缘内设置加劲肋后,屈曲荷载提高1.31倍,合理设置加劲肋可以大幅提高组合柱的整体稳定性。随着混凝土强度等级的增加,构件屈曲荷载提高幅度越来越小。根据有限元数值解,通过简化混凝土影响系数建立STHCC构件的屈曲荷载计算公式,获得的屈曲模态为该类组合柱非线性稳定性能提供初始缺陷形态。In order to study the overall stability of STHCC,the section form,constraint condition,component length and the concrete grade for the parameters,11different section forms of H type honeycomb steel column and 18STHCC components were designed.Using ABAQUS software to establish the finite element model of 29 H honeycomb steel columns,the eigenvalue buckling analysis is carried out based on the simplified mechanical model and constitutive model.Through comparing the simulation analysis and theoretical results of the STHCC,both of which are in good agreement,the rationality of the finite element model is verified in this paper.The eigenvalue buckling analysis of 18STHCC is carried out based on the above mentioned.The deformation cloud and buckling load in the first order mode are extracted and compared.The variation law of buckling load and deformation under different cross section form,slenderness ratio,constraint mode and concrete grade condition were investigated.The results show that the honeycomb shaped web plate can not only reduce the amount of steel,but also affect the stability of the component.The overall stability of the STHCC component is better than that of the common H type steel column and the flange of the steel tube H type steel column.Under the same conditions,compared with the ordinary H steel column and H type steel column with flange for steel tube,the STHCC can increase the buckling load by 1.88times and 1.23times.After the STHCC member flange of the steel pipe is provided with the stiffening rib,the buckling load will be increased by 1.31times,and the overall stability of the composite column can be greatly improved by adding stiffening rib reasonably.With the increase of the concrete strength grade,the growth rate of the buckling load decreases gradually.The pcrcalculation formula of buckling load of STHCC component is established by the simplified coefficientβbased on the finite element numerical solution.The buckling mode can provide the initial imperfection for the nonlinear stability.Last

关 键 词：H型蜂窝组合柱 钢管混凝土 ABAQUS 特征值屈曲 屈曲荷载 设计建议 

分 类 号：TU324.5[建筑科学—结构工程]