中心支撑-框架钢结构设计与研究

李玉荣; 蔡康峰; 唐月

doi:10.13204/j.gyjz201011028

中心支撑-框架钢结构设计与研究

doi: 10.13204/j.gyjz201011028

1.
安徽理工大学土木建筑学院,安徽淮南232001

基金项目:

住房和城乡建设部研究开发项目(2008-K2-6);安徽省教育厅自然科学基金重点项目(KJ2009A141);安徽省人才专项基金项目(2008Z033)

详细信息

作者简介:
李玉荣，男，1971年出生，博士，副教授。 E－mail:yrli@aust.edu.cn

中图分类号: TU391
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- 文章访问数: 96
- HTML全文浏览量: 9
- PDF下载量: 239
- 被引次数: 0
出版历程
- 收稿日期: 2010-03-20
- 刊出日期: 2010-11-20

STUDY AND NEW DESIGN METHOD FOR CHEVRON-BRACED STEEL FRAMES

1.
Department of Civil Engineering,Anhui University of Science and Technology,Huainan 232001,China

摘要

摘要: 对人字形中心支撑-框架结构的抗震设计进行研究。在不同的支撑长细比下，支撑受压屈曲后的强度退化程度是不同的。根据我国抗震规范规定的设计支撑强度的方法，当取不同的长细比时，会产生不同的结构初始刚度和变幅很大的强度值，且工程设计很复杂。为此，提出一新的支撑强度设计方法，并认为人字形中心支撑的强度是由一侧杆受压后屈曲强度与另一侧杆的受拉屈服强度两部分构成。新的设计方法确保了结构初始刚度和强度不受支撑长细比影响。建议方法的优点还在于其能够较好地控制最大层间位移角。最后，深入探讨了多层钢支撑-框架结构出现薄弱层的问题。
- 支撑 /
- 中心支撑-框架结构 /
- 压杆屈曲 /
- 长细比 /
- 薄弱层
Abstract: It is studied the seismic design of steel braced frames in which the braces are configured in a chevron pattern.Strength deterioration in post-buckling phase varies with the slenderness ratio of brace.Because the present chinese seismic code method for the calculation of brace strength supplies significantly different elastic stiffness and actual strength for different values of slenderness ratio of brace,it is complicated for the design of chevron brace.A new procedure to estimate the strength of a chevron brace is proposed,in which the strength of a brace pair is the sum of the yield strength for the brace in tension and the post-buckling strength for the brace in compression.The new method ensures an identical elastic stiffness and a similar strength regardless of the slenderness ratio of brace.The advantage of the proposed method over the conventional chinese seismic code method is demonstrate for the capacity of the proposed method to control the maximum inter-story drift.Finally,concentration of multi-story chevron-braced frames is discussed.
- brace /
- chevron-braced frame /
- buckling /
- slenderness ratio /
- concentration of frame

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参考文献(11)

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