摘要
本文主要由两部分组成。在第１部分中将叠层钢板橡胶支座水平刚度与不考虑Ｐ—Δ效应的水平刚度的比值看作是无量纲临界力的函数。这种表达方式便于制作设计计算用图表。在第２部分提出了两种形式的简化表达式，这些公式不仅可以应用于设计计算，还可以应用于后屈曲的简化分析。此外，文中还引入了一个与弯剪变形比值有关的参数，并建议将它作为反映橡胶支座特性的重要参数。
On the basis of elaborate analysis and computation for the non dimensional expression for the calculation formula of the horizontal rigidity coefficient of seismic isolation rubber bearing in consideration of P—Δ effect,a simplified calculation method,suitable for engineering application and post buckling analysis ,is put forward in this paper The proposed horizontal rigidity coefficient ratio calculation formula is K H(P)K H(P=0)=(1-pp cr )(1+ p p cr ), herein P is axial compression force,K H(P) is horizontal rigidity coefficient with specified p value, p cr =14λ 2+π 2-12λ, p p cr =0 79λ -1 57 +0 88, p=PhEIGA, λ=EIGAh 2 andK H(P=0)=(hGA+h 312EI) -1 It is pointed out that if λ≈4 5,then p ≈p cr ,and thus K H(P)K H(P=0)≈1-(pp cr ) 2 The last formula is one of the widely used simplified expressions In addition,the accuracy of calculation results of rigidity coefficient ratio obtained from the formula and the above approximate one has been compared
出处
《建筑科学》
1998年第6期3-8,共6页
Building Science
基金
国家自然科学基金委员会资助
关键词
叠层钢板
橡胶支座
水平刚度系数
隔震橡胶支座
laminated rubber bearing
horizontal rigidity coefficient
non dimensional expression
