Reinforced coral aggregate concrete beam and reinforced ordinary aggregate concrete beam with different concrete type, concrete strength, and steel type were designed in this study to investigate their shear behavior. The shear behavior of reinforced coral aggregate concrete beam was tested, the failure mode and deflection behavior were studied, and the calculating model for the ultimate shear capacity (Vcs) of reinforced coral aggregate concrete beam was proposed. Results showed that the failure mode of reinforced ordinary aggregate concrete beam and reinforced coral aggregate concrete beam were basically the same. As the concrete strength increases, the normal section cracking load (Vcr), inclined section Vcr, and Vcs of reinforced coral aggregate concrete beam increased gradually. Furthermore, Vcr and Vcs of reinforced coral aggregate concrete beam were as follows: 316 stainless steel > common steel > zinc-chromium coated steel > new organic coated steel. For the coral aggregate concrete structure in ocean engineering, in order to prolong its service life, the use of new organic coated steel was suggested. At the same time, the influence of high-strength coral aggregate concrete and stirrup corrosion was comprehensively considered and the calculation model for the Vcs of reinforced coral aggregate concrete beam was presented and was then verified.

中文翻译：

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钢筋珊瑚骨料混凝土梁抗剪性能研究

本研究设计了不同混凝土类型、混凝土强度和钢筋类型的钢筋珊瑚骨料混凝土梁和钢筋普通骨料混凝土梁，以研究它们的剪切行为。对钢筋珊瑚骨料混凝土梁的剪切行为进行了试验，研究了破坏模式和挠度行为，提出了钢筋珊瑚骨料混凝土梁的极限抗剪承载力（Vcs）计算模型。结果表明，钢筋普通骨料混凝土梁和钢筋珊瑚骨料混凝土梁的破坏模式基本相同。随着混凝土强度的增加，钢筋珊瑚骨料混凝土梁的正截面开裂荷载（Vcr）、斜截面Vcr和Vcs逐渐增加。此外，钢筋珊瑚骨料混凝土梁的Vcr和Vcs为：316不锈钢>普通钢>锌铬涂层钢>新型有机涂层钢。对于海洋工程中的珊瑚骨料混凝土结构，为了延长其使用寿命，建议采用新型有机涂层钢。同时，综合考虑高强珊瑚骨料混凝土和箍筋腐蚀的影响，提出了钢筋珊瑚骨料混凝土梁的Vcs计算模型并进行了验证。