To study the flexural behavior and calculation model, 8 coral aggregate concrete (CAC) beams with different types of steel were designed. The flexural behavior of CAC beam was tested. The failure mode, bearing capacity, the maximum crack width (w_s) and average crack spacing (l_m) were studied. A calculation model for the bearing capacity of CAC beam was proposed. The results indicated that with the steel strength increased, the cracking moment (M_cr) and ultimate moment (M_u) of CAC beam increased, and the development of the w_s gradually slowed, which effectively inhibited the formation of cracks and improved the flexural behavior of CAC beam. For CAC structures in the ocean engineering, it is recommended to use organic new coated steel to extend its effective service life. In addition, considering the influence of steel corrosion, a calculation model for the M_cr, M_u, l_m and w_s of CAC beam was established.

为了研究挠曲特性和计算模型，设计了8种不同类型钢的珊瑚骨混凝土梁。测试了CAC梁的弯曲行为。研究了失效模式，承载能力，最大裂纹宽度（w _s）和平均裂纹间距（l _m）。提出了CAC梁承载力的计算模型。结果表明，与钢的强度增加时，开裂弯矩（中号_CR）和极限力矩（中号_Ù）的CAC光束增加，的发展瓦特_小号逐渐减慢，有效地抑制了裂纹的形成，改善了CAC梁的抗弯性能。对于海洋工程中的CAC结构，建议使用有机新型涂层钢以延长其有效使用寿命。另外，考虑到钢腐蚀的影响，建立了CAC梁的M _cr，M _u，l _m和w _s的计算模型。