Eurocode 3 and the in-plane stability of portal frames
Eurocode 3 and the in-plane stability of portal frames
复制标题
欧洲规范 3 和门式刚架的面内稳定性
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Vikki Edmondson
中科院分区：
文献类型：
--
作者：
James B. P. Lim;C. King;A. Rathbone;J. M. Davies;Vikki Edmondson
提出了简单的设计准则，使工程人员在按欧洲规范3进行单层门式刚架塑性设计时可以考虑平面内稳定性，而不需要求助于二阶弹塑性分析软件。建议的设计规则是根据不同类型框架的参数研究结果制定的，基于Merchant-Rankine折减法，并考虑了应变硬化带来的适度好处。文中还给出了计算Merchant-Rankine折减率所需的弹性临界载荷的一种简单手工估算方法。根据参数研究的结果，建议的设计规则将框架分为两类：-A类：规则、对称和单节距框架-B类：属于A类之外但不包括每一类框架的系杆门的框架，提出了基于Merchant-Rankine折减方法的折减系数。
Simple design rules are proposed that will enable engineers to take into account in-plane stability when designing single-storey steel portal frames plastically to Eurocode 3, without the need to resort to second-order elastic-plastic analysis software. The proposed design rules, developed from the results of a parametric study of different types of frame, are based on the Merchant-Rankine reduction method and take into account a modest amount of benefit from strain-hardening. A simple hand method for estimating the elastic critical load, required for calculating the Merchant-Rankine reduction, is also presented. From the results of the parametric study, the proposed design rules place frames into one of two categories: - Category A: Regular, symmetric and mono-pitched frames - Category B: Frames that fall outside of Category A but excluding tied portals For each category of frame, a reduction factor based on the Merchant-Rankine reduction method is proposed.