广义初始缺陷对模板支架稳定性的影响

基金项目:

国家自然科学基金资助项目(50978219;50878176);陕西省教育厅专项科研计划资助项目(08JK333)

INFLUENCE OF GENERALIZED INITIAL IMPERFECTIONS ON STEEL CONSTRUCTION CONNECTED WITH FASTENERS

1.
1. School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;
2.
2. School of Building Engineering,Xi’an Eurasia University,Xi’an 710065,China

摘要: 以5个不同工况的模板支架足尺寸的极限承载力试验研究为基础,引入模板支架的广义初始缺陷,建立三维有限元模型,利用该有限元模型可以较准确地分析模板支架广义初始缺陷对结构稳定性的影响。通过现场测试进一步表明:对于模板支架,结构的整体初始缺陷和构件的初始缺陷对该体系稳定性的影响均可以等效为作用于节点处的等效假想水平力,而且等效假想水平力参与所有的荷载组合。
- 模板支架 /
- 广义初始缺陷 /
- 等效假想水平力 /
- 稳定性
Abstract: Based on the study on ultimate strength test of full-size falsework in 5 different operating conditions,and by the introduction of a stable bearing capacity test of the falsework,a three-dimensional finite element model is set up,with which the effect of generalized initial imperfections on the structural stability can be analyzed more accurately.It is further shown through on-site testing that the geometric imperfections of the partially-braced frame column may be replaced by the equivalent notional lateral load.Moreover,generalized equivalent notional lateral loads participate in all of the load combination.
- falsework /
- generalized initial imperfections /
- equivalent notional lateral loads /
- stability