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结合文献［1］的试验结果，比照文献［3］中普通混凝土梁短期刚度的推导方法，考虑水工钢筋混凝土叠合梁的受力特点，提出了水工钢筋混凝土叠合梁短期刚度理论计算公式并参考文献［2］，对理论公式作了相应简化．验算表明，这些公式与试验结果符合较好．本文还推导了可用于挠度验算的水工钢筋混凝土叠合梁长期刚度计算公式
According to the test results in [1], the short-term stiffness of composite reinforced concrete beams is deduced based on the deduced method of short-term stiffness of ordinary concrete beams in [3] and considering the mechanical characteristics of hydraulic composite beams. Formula and reference [2], the theoretical formula has been simplified accordingly. The checking shows that these formulas are in good agreement with the test results. In this paper, the formula for calculating the long-term stiffness of hydraulic reinforced concrete composite beams which can be used for deflection checking