平面钢框架精炼塑性铰法的改进与应用  

Improvement and Application of Refined Plastic-Hinge Method of Plane Steel Structure

作　　者：贾连光[1] 白宏涛[2] 史永彬 

机构地区：[1]大连理工大学土木水利工程学院 [2]辽宁省建筑设计研究院,辽宁沈阳110005 [3]中国建筑东北设计研究院,辽宁沈阳110006

出　　处：《沈阳建筑大学学报（自然科学版）》2008年第3期380-384,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：建设部科技攻关项目(2002)

摘　　要：目的改进平面钢框架高等分析方法的精炼塑性铰法,真实有效地反映钢框架的极限承载力及有侧移框架结构的稳定情况.方法在精炼塑性铰方法的基础上采用有侧移杆件作为计算单元,并对单元切线刚度矩阵进行修正来考虑结构的二阶效应(P-Δ),及有侧移杆件单元两端截面的塑性扩展.结果采用改进后的方法的计算结果,与钢框架的经典算例及两层单跨钢框架实验的结果吻合良好.结论钢结构的高等分析方法较真实地反映了结构在荷载作用下的内力和变形状态,得到了更精确的结果,比基于计算长度考虑构件稳定的线弹性分析的分析方法更优越.Aiming at the deficiency of the current steel structures design method, the necessity of advanced analysis and design for steel structure is emphasized, some non-linear factors about the structure stability such as the basic element, residual stress, geometry flaw and second-order analysis are discussed. And this article improves the plastic-hinge method which is widely used in plane steel structure analysis at present and amend the tangent stiffness matrix based on the plastic-hinge method, taking into consideration the secondorder effect and both sides section plastic expansion of basic element with side sway. These calculations and examples show that the advanced analysis method for steel structure is better than the linear elastic analysis method which is based on calculation of length emphasizing element stability.

关 键 词：钢框架 高等分析 精炼塑性铰法 二阶效应 

分 类 号：TU352.1[建筑科学—结构工程]