判斷題按塑性理論計(jì)算雙向板時(shí),上限解只滿足平衡條件、屈服條件,計(jì)算結(jié)果偏大;下限解只滿足機(jī)動(dòng)條件、屈服條件,計(jì)算結(jié)果偏小。()