[ETABS] ETABS警告”THE STRUCTURE IS UNSTABLE OR ILL-CONDITIONED!!”

坚持实干、坚持一线、坚持积累、坚持思考,坚持创新。


提示报错。出现这种错误的可能软件提示以下几种可能:

– INADEQUATE SUPPORT CONDITIONS, OR 支座约束条件不足

– ONE OR MORE INTERNAL MECHANISMS, OR 存在机构

– ZERO OR NEGATIVE STIFFNESS PROPERTIES, OR 刚度为0或者负刚度

– EXTREMELY LARGE STIFFNESS PROPERTIES, OR 刚度特性设置过大

– BUCKLING DUE TO P-DELTA OR GEOMETRIC NONLINEARITY, OR 由于P-Delta或者几何非线性分析引起结构曲屈

– A FREQUENCY SHIFT (IF ANY) ONTO A NATURAL FREQUENCY  存在频率偏移

经过检查,是因为指定了过大的刚度特性修正系数导致结构方程不稳定。。。。。


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