pkpm薄弱层的判断疑问

我做了一个框架结构，侧刚的计算结果如下：
1、第八层的侧刚明显小于第九层侧刚的0.7，pkpm给出的比值却是11多，这是什么原因？

2、另外有没有遇到过屋顶的侧刚巨大的情况，导致下面几层是薄弱层，谁知道这是什么原因？



Floor No. 8 Tower No. 1
Xstif= 48.6549(m) Ystif= 13.7808(m) Alf = 45.0000(Degree)
Xmass= 47.3918(m) Ymass= 14.2263(m) Gmass(活荷折减)= 1615.5327( 1497.7280)(t)
Eex = 0.0465 Eey = 0.0164
Ratx = 0.5583 Raty = 0.5583
Ratx1= 11.5950 Raty1= 11.5069
薄弱层地震剪力放大系数= 1.00
RJX1 = 3.4136E+06(kN/m) RJY1 = 3.4136E+06(kN/m) RJZ1 = 0.0000E+00(kN/m)
RJX3 = 4.6619E+05(kN/m) RJY3 = 4.2476E+05(kN/m) RJZ3 = 0.0000E+00(kN/m)
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Floor No. 9 Tower No. 1
Xstif= 50.3125(m) Ystif= 15.0687(m) Alf = 45.0000(Degree)
Xmass= 45.2040(m) Ymass= 15.0758(m) Gmass(活荷折减)= 1096.9896( 1017.2922)(t)
Eex = 0.4442 Eey = 0.0006
Ratx = 0.4941 Raty = 0.4941
Ratx1= 0.5438 Raty1= 5.3174
薄弱层地震剪力放大系数= 1.25
RJX1 = 1.6867E+06(kN/m) RJY1 = 1.6867E+06(kN/m) RJZ1 = 0.0000E+00(kN/m)
RJX3 = 1.0638E+06(kN/m) RJY3 = 5.9917E+05(kN/m) RJZ3 = 0.0000E+00(kN/m)
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