叠加法验算预应力混凝土圆形截面构件裂缝宽度

Crack Width Calculation of PC Round Section Member with Superposition Method

在大跨度建筑工程中,顶层采用预应力混凝土圆形截面排架柱,可提有效高柱的抗裂性能。但现行规范尚无预应力混凝土圆形截面构件裂缝宽度的验算公式,部分规范给出了圆形截面钢筋混凝土构件裂缝宽度的计算公式。基于这些公式,采用叠加法推导出预应力混凝土圆形截面构件裂缝宽度的验算公式。

In long-span construction projects,the use of pre-stressed concrete circular section bent columns on the top floor can effectively improve the crack resistance of columns. However,there is no formula for checking the crack width of circular section members in current codes. Some codes give the formula for calculating the crack width of circular section reinforced concrete members. Based on these formulas,the checking formula of crack width of prestressed concrete circular section members is deduced by superposition method.