| 变截面钢管混凝土格构柱轴压极限承载力 |
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| 引用本文： | 欧智菁,晏巧玲,薛建阳,陈宝春.变截面钢管混凝土格构柱轴压极限承载力[J].重庆大学学报(自然科学版),2016,39(5):114-120. |
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| 作者姓名： | 欧智菁 晏巧玲 薛建阳 陈宝春 |
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| 作者单位： | 1. 福建工程学院土木工程学院,福州350007;福州大学土木工程学院,福州350002;2. 福州大学土木工程学院,福州,350002;3. 西安建筑科技大学土木工程学院,西安,710000 |
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| 基金项目： | 国家自然科学基金资助项目（51408128，51178118）。 |
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| 摘 要： | 变截面钢管混凝土格构柱的轴压试验结果表明,随着试件高度的增大和柱肢坡度的减小,其极限荷载逐渐降低.基于上述规律,在等截面钢管混凝土格构柱计算框架的基础上,研究了变截面钢管混凝土格构柱轴压极限承载力的计算方法.提出变截面钢管混凝土格构柱等效长度的概念和等效长度法的计算公式,其承载力计算结果与试验结果吻合良好.最后在有限元数值分析验证的基础上,给出适合工程应用的四肢变截面钢管混凝土格构柱轴压极限承载力的实用算法,为钢管混凝土设计规程的进一步完善提供参考.
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| 关 键 词： | 变截面 钢管混凝土 格构柱 轴压 极限承载力 计算方法 |
| 收稿时间： | 2016/2/29 0:00:00 |
The ultimate load carrying capacity of variable cross-sectional concrete filled steel tubular laced columns on axial load |
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| OU Zhijing,YAN Qiaoling,XUE Jianyang and CHEN Baochun.The ultimate load carrying capacity of variable cross-sectional concrete filled steel tubular laced columns on axial load[J].Journal of Chongqing University(Natural Science Edition),2016,39(5):114-120. |
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| Authors: | OU Zhijing YAN Qiaoling XUE Jianyang and CHEN Baochun |
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| Institution: | School of Civil Engineering, Fujian University of Technology, Fuzhou 350007, P.R.China;College of Civil Engineering, Fuzhou University, Fuzhou 350002, P.R.China,College of Civil Engineering, Fuzhou University, Fuzhou 350002, P.R.China,School of Civil Engineering, Xi''an University of Architecture and Technology, Xi''an 710000, P.R.China and College of Civil Engineering, Fuzhou University, Fuzhou 350002, P.R.China |
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| Abstract: | Test results of variable cross-sectional concrete filled steel tubular (CFST) laced columns on axial load indicate that the ultimate load of specimens reduces gradually with the increase of column length and the decrease of slope of longitudinal elements. Following this rule, a calculation method of the ultimate load carrying capacity of CFST variable cross-sectional laced columns on axial load was studied on the base of calculation frame of equal cross-sectional CFST laced columns. A method by using equivalent length to calculate equivalent slenderness ratio and stability factor of variable cross-sectional CFST laced columns was presented. The calculation results of specimens'' ultimate load by this method are coincident well with the test results. Finally, a rational and applied method to calculate the ultimate load carrying capacity of four-element variable cross-sectional CFST laced columns was presented on the base of numerical results from FEM analysis, and it''s hoped to provide reference for the further perfection of CFST design criteria. |
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| Keywords: | variable cross-sectional concrete-filled steel tube(CFST) laced column axial load ultimate load carrying capacity calculation method |
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