保证真实钢结构稳定的剩余物理刚度

童根树; 金坚

doi:10.13204/j.gyjz201304001

保证真实钢结构稳定的剩余物理刚度

doi: 10.13204/j.gyjz201304001

童根树¹,
金坚²

1.
1. 浙江大学高性能材料与结构研究所,杭州 310058;
2.
2. 华汇工程设计集团有限公司,浙江绍兴 312000

详细信息

作者简介:
第一作者：童根树, 男, 1963年出生, 教授?电子信箱：tonggs@zju.edu.cn

中图分类号: TU391;TU311.2
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- 被引次数: 0
出版历程
- 收稿日期: 2013-01-15
- 刊出日期: 2013-04-20

RESIDUAL STIFFNESS ASSURING STABILITY OF REAL STEEL STRUCTURES

Tong Genshu¹,
Jin Jian²

1.
1. Institute of High Performance Material and Structure,Zhejiang University,Hangzhou 310058,China;
2.
2. Huahui Engineering Design Group Co,Shaoxing 312000,China?

摘要

摘要: 通过框架弹性和弹塑性稳定、压弯杆弹塑性稳定、水平支撑杆对柱子提供侧向支撑和双重抗侧力结构中支撑架对框架的支撑作用等几个典型的钢结构稳定问题，提出并阐述了扣除水平力和弯矩消耗掉的构件和支撑的部分刚度以后的剩余物理刚度，才是保证真实钢结构稳定的因素。稳定性验算的实质是保证结构具有足够的剩余物理刚度，确保结构不会失稳。通过压弯杆平面内稳定验算公式的分析和双重抗侧力结构的弹塑性失稳讨论发现，极限状态下，水平力(弯矩)对弹塑性构件和支撑架刚度的消耗速度是线性和高于线性的。
- 稳定 /
- 刚度 /
- 压杆 /
- 支撑 /
- 双重抗侧力结构
Abstract: Through revisiting the classic problems of elastic and elastic-plastic buckling of frames, elastic-plastic stability of beam-columns, buckling of column braced at midspan by a horizontal brace and the buckling of dual structural system, it was proposed the concept of residual stiffness, i.e.the residual part of the total stiffness after deducting the stiffness depleted by horizontal forces and bending moments in the members.Check for stability of members and structures in real steel structures is to assure a minimum residual stiffness of the members and structures to resist against the destabilizing effect of gravity loads.Through analysis of the instability of beam-columns and dual structural systems, it was revealed that in the limit state, the stiffness was linearly or more than linearly decreased due to the horizontal load(bending moment).
- stability /
- stiffness /
- column /
- brace /
- dual structural system ?