ABAQUS桩基计算不收敛问题，求问？

具体warning信息为：

Node 1300 instance soil-1 is common between the contact pair (assembly_soil-1_zhuang2-zs-sizhou, assembly_soil-1_soil-zhuang2-zs-sizhou). No constraint is formed for this node.

Warning message limit reached. No further warning messages will be reported.

Solver problem. Zero pivot when processing D.O.F. 1 of 49 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_1_1_1_1_1.

The strain increment is so large that the program will not attempt the plasticity calculation at 44439 points

The plasticity/creep/connector friction algorithm did not converge at 2 points

Program is asked to invert a singular matrix

The strain increment is so large that the program will not attempt the plasticity calculation at 42610 points

诸如此类。。。。

我设置的桩和土体摩擦接触，桩底和土tie约束。不知何故，无法收敛。