【摘要】 轻木-混凝土上下混合结构属"下刚上柔"的结构形式,刚度沿高度分布不均匀,地震作用计算较复杂。为便于这类结构的应用,需要寻找更为简单方便的地震作用计算方法。本文通过有限元模拟分析,计算不同刚度比时,轻木-混凝土上下混合结构的地震响应,从而分析出刚度比对此种结构地震作用响应的影响。根据时程分析结果,得出当刚度比小于10时,可采用整体底部剪力法计算;当刚度比大于10时,可采用上下两部分独立计算的方法,并对上部木结构乘以放大系数β,β取值与刚度比有关。更多还原

【Abstract】 Light wood-concrete hybrid structure is useful in China,but the stiffness of concrete is larger than that of light wood,it’s difficult to calculate the earthquake responses.In this paper,some finite- element models with different stiffness ratio were developed to analyse the effect of stiffness ratio on the earthquake responses of light wood-concrete hybrid structure.According to the results,we found that when the stiffness ratio is smaller than 10,we can use the bottom shear method,when the stiffness ratio is larger than 10,we can calculate these two parts respectively and multiply the upper timberwork by an amplification factorβ,which is relate to the stiffness ratio.更多还原