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前言钢筋砼烟囱强度计算方法目前尚未合理解决。设计经验表明,钢筋砼烟囱筒身截面计一般由裂缝宽度控制,但在八度以上地震区则往往由强度控制,因此提出确实可行的筒身强度计算方法乃是当前设计实践的迫切任务。我国现行钢筋砼结构设计规范(TJ10-74)虽已给出了环形截面偏心受压构件强度及偏心距增大系数(考虑柔度影响)的计算公式,但直接用于筒身强度(及柔度)计算则是有困难的,因高温对筒身承载能力的影响;筒身开孔(与烟道联接处)的影响;考虑筒柔身度影响的计算方法;环形截面构件强度破坏
Introduction The method for calculating the strength of reinforced concrete chimneys has not yet been reasonably resolved. The design experience shows that the cross-section of a reinforced concrete chimney tube body is generally controlled by the crack width, but it is often controlled by the strength in earthquake regions above octaves. Therefore, it is an urgent task for the current design practice to propose a practical method for calculating the strength of the tubular body. Although China’s current reinforced concrete structure design specification (TJ10-74) has given the calculation formula for the strength and eccentricity increase coefficient (in consideration of the influence of flexibility) of an eccentrically-compressed member with a circular section, it is directly applied to the strength of the shaft (soft Calculation is difficult due to the effect of high temperature on the load capacity of the barrel; the influence of the opening of the barrel (joint with the flue); the calculation method considering the influence of the degree of flexibility of the barrel;