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(一)柱经济吊点精确解在工业与民用建筑施工中,柱吊装是个重要环节。理论与实践都证明,若吊装施工方案不当,吊点位置选择不合理,吊装产生的截面内力往往会大于由于排架作用对柱产生的截面内力,引起构件开裂。因而控制计算,导致增加配筋量。单层厂房中的牛腿柱,一般采用单点吊装施工方法,将吊点设在牛腿底部,这是可行的。而在民用建筑,例如火车站建筑中,排架柱一般采用无牛腿的钢筋混凝土矩形截面实腹柱,
(I) Accurate solution of pillar economic lift points Column hoisting is an important link in the construction of industrial and civil buildings. Both theory and practice have proved that if the hoisting construction scheme is not proper, the selection of the lifting point position is unreasonable, and the internal force generated by the lifting tends to be greater than the internal force of the section generated due to the action of the bent frame, causing cracking of the component. Therefore, control calculations lead to an increase in the amount of reinforcement. The cow legs in a single-storey factory building generally use single-point hoisting construction methods, and the hanging point is set at the bottom of the cow legs. This is feasible. In civil buildings, such as railway station buildings, the column columns are generally made of reinforced concrete rectangular section solid columns without shins.