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浙江大学学报(工学版)
浙江大学学报(工学版)
土木与交通工程     
矩形钢管截面延性等级和板件宽厚比相关关系
欧阳丹丹1, 付波2,3, 童根树3
1. 武警杭州士官学校,浙江 杭州 310023； 2. 杭萧钢构股份有限公司,浙江 杭州 310003；3. 浙江大学 土木工程学系,浙江 杭州 310058
Ductility grading of rectangular steel tube section and width thickness ratio correlation
OUYANG Dan dan1, FU Bo2,3 , TONG Gen shu3
1. Hangzhou Non Commissioned Officer Academy of CAPF, Hangzhou 310023, China； 2. Hangxiao Steel Structure Company Limited, Hangzhou 310003, China； 3. Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China
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摘要：

利用ANSYS软件建立矩形钢管截面有限元模型,对压弯荷载作用下的模型进行非线性分析,得到截面弯矩—曲率曲线.采用曲率定义截面延性,分析残余应力、初始几何缺陷、模型长高比、板件厚度比、板件宽厚比对截面延性的影响,并拟合得到通用宽厚比和截面延性系数的关系式.根据地震力计算时采用的结构影响系数大小划分钢管截面的延性等级.区分结构影响系数中是否考虑结构超强的影响,给出各级截面的结构延性需求和截面延性需求,利用截面延性系数计算公式反推相对应的通用宽厚比分界.引入板件宽厚比的比值和钢管截面屈曲系数,将通用宽厚比分界转换成组成截面的板件宽厚比相关关系,并提出相关关系计算公式.结果表明,残余应力和初始几何缺陷对截面延性影响不大,当屈曲半波数大于1之后,长高比对截面延性的影响也可以忽略.腹板和翼缘板间的相互作用对截面延性影响较大,在划分截面延性等级时,需采用板件宽厚比相关关系的形式.
Abstract:
The finite element models of rectangular steel tube section were built by ANSYS software. Under combined bending and compression, the moment curvature curves of cross section were obtained by nonlinear analysis and the section ductility was defined by curvature. The effects of residual stress, initial geometric imperfection, length height ratio, plate thickness ratio and width thickness ratio on section ductility were analyzed. Relation between the slenderness and ductility factor of steel tube section was proposed. The ductility grading of sections were classified by structural behavior factors which were used to calculate seismic force. Whether over strength factor was included in the structural behavior factor was distinguished. The requirements of structure ductility and section ductility were given on all kinds of sections and the corresponding slenderness boundaries were obtained by using ductility factors formula of steel tube section. By introducing the ratio of width thickness ratio and buckling coefficient of steel tube section, slenderness boundaries were converted into the correlation of the width thickness ratio of flange and web, and the correlation formula of width thickness ratio was proposed.The results show that residual stress and initial geometric imperfection has less effect on section ductility. When the number of buckling half wave is greater than one, the effect of length height ratio can also be neglected. The interaction between flange and web has great influence on section ductility. It is necessary to adopt the form of width thickness ratio correlation to classify the ductility grading of section.
出版日期: 2016-02-01
:  TU 391  
基金资助:

国家自然科学基金资助项目（51078328).
通讯作者: 童根树，男，教授.ORCID:0000 0002 3985 8429.     E-mail: tonggs@ zju.edu.cn
作者简介: 欧阳丹丹(1983—)，女，硕士，从事钢结构抗震方面的研究.ORCID:0000 0002 9597 0346. E-mail:1045040639@qq.com
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欧阳丹丹, 付波, 童根树. 矩形钢管截面延性等级和板件宽厚比相关关系[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.02.011.

OUYANG Dan dan, FU Bo,TONG Gen shu. Ductility grading of rectangular steel tube section and width thickness ratio correlation. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.02.011.

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http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.02.011    或    http://www.zjujournals.com/eng/CN/Y2016/V50/I2/271

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