求助：sap2000警告

我用sap2000计算地铁地下车站，模型取支撑在弹性地基梁上的平面框架结构，出现如下警告：
* * * W A R N I N G * * *
NUMERICAL PROBLEMS ENCOUNTERED DURING EQUATION ASSEMBLY:

TYPELABEL DOF X-COORD Y-COORD Z-COORD PROBLEM VALUE
----- ------- -- ----------- ----------- ----------- ------------- -----------
Joint 107 UZ 1.600000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 107 RX 1.600000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 107 RY 1.600000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 96 UZ 1.200000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 96 RX 1.200000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 96 RY 1.200000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 85 UZ 0.800000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 85 RX 0.800000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 85 RY 0.800000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 74 UZ 0.400000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 74 RX 0.400000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 74 RY 0.400000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 63 UZ .000000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 63 RX .000000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 63 RY .000000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 52 UZ -0.400000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 52 RX -0.400000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 52 RY -0.400000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 41 UZ -0.800000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 41 RX -0.800000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 41 RY -0.800000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 30 UZ -1.200000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 30 RX -1.200000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 30 RY -1.200000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 10 UZ -1.600000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 10 RX -1.600000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 10 RY -1.600000 -1.600000 3.000000 Diag = 0 --> 1.00E-10
Joint 108 UZ 1.600000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 108 RX 1.600000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 108 RY 1.600000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 97 UZ 1.200000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 97 RX 1.200000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 97 RY 1.200000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 86 UZ 0.800000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 86 RX 0.800000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 86 RY 0.800000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 75 UZ 0.400000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 75 RX 0.400000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 75 RY 0.400000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 64 UZ .000000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 64 RX .000000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 64 RY .000000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 53 UZ -0.400000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 53 RX -0.400000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 53 RY -0.400000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 42 UZ -0.800000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 42 RX -0.800000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 42 RY -0.800000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 31 UZ -1.200000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 31 RX -1.200000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 31 RY -1.200000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 12 UZ -1.600000 -1.200000 3.000000 Diag = 0 --> 1.00E-10
Joint 12 RX -1.600000 -1.200000 3.000000 Diag = 0 --> 1.00E-10

NUMBER OF EIGENVALUES BELOW SHIFT =0
请大家帮忙！