微弯弧形钢筋混凝土构件裂缝计算方法研究

Research on Crack Calculation Method of Slightly Bending Rebars Concrete Members

水工大体积混凝土结构施工中常设宽槽以缓解温度应力,为改进跨宽槽钢筋的工作状态,提出了一种微弯弧形跨宽槽钢筋形式,能够减小直钢筋过缝的应力损失并提高施工效率。在弧形钢筋混凝土板受弯试验的基础之上,研究了弧形钢筋混凝土构件的裂缝计算方法。从单根微弯弧形钢筋混凝土构件受拉分析入手,扩展到多根微弯弧形钢筋混凝土构件受弯分析,最终得到裂缝间距及裂缝宽度的计算方法。

In order to alleviate the temperature stress in the construction of large volume concrete structure of large volume,a kind of novel slightly bending rebars across the wide joint is proposed,which can reduce the stress loss of the straight rebars and improve the construction efficiency.On the basis of flexurd tests of bending rebars concrete slab,the crack calculation method of bending rebar concrete members is studied.From the analysis of the tensile analysis of novel slightly bending rebar concrete members,the flexural analysis of multiple novel slightly bending rebar concrete members is extended.Finally,the calculation method of crack spacing and crack width is obtained.