组合梁cdp模型收敛?

The plasticity/creep/connector friction algorithm did not converge at 1 points The strain increment has exceeded fifty times the strain to cause first yield at 449 points The strain increment is so large that the program will not attempt the plasticity calculation at 1 points The plasticity/creep/connector friction algorithm did not converge at 56 points 钢混组合梁运用cdp模型就出现这种情况，大概是什么原因😓求助大佬