当前随着预制装配式多层建筑在民用和工业厂房中的广泛应用,预制钢筋混凝土长柱(以下简称长柱)的长度逐渐加大。在这种情况下、控制长柱应力(主要是弯矩)的条件,往往不是柱在使用阶段时的荷载,而是由施工吊装时的条件控制的。上 With the wide application of prefabricated multi-story buildings in civil and industrial plants, the length of precast reinforced concrete long columns (hereinafter referred to as long columns) is gradually increasing. In this case, the conditions that control the long column stress (mainly the bending moment) are often not the load of the column during the use phase, but are controlled by the conditions during the construction lifting. on