In recent decades, with the advancement of coral reef construction, the inception of design and production of coral concrete has emerged. However, current research primarily focuses on medium and low strength grades, leaving the exploration of high-strength coral concrete (HSCC) in its infancy. Therefore, in this paper, uniaxial compression test and microscopic mean are utilized to investigate the stress-strain full curves, crack development and damage characteristics of HSCC with different strength grades and fiber. The findings demonstrate that after the peak stress, the stress of HSCC with different strength grades decreases sharply, and their residual stresses are 21.5%–30.3% of the peak stress, which is lower than that of ordinary coral concrete, which is 29.2%–52.5%. The crack inclination angle of high-strength coral concrete containing fiber is mainly concentrated at 62°–70°, and it shows ductile damage. Moreover, fiber in high-strength coral concrete undergoes damage mainly by pulling and breaking. Additionally, the locations of the characteristic points of the stress-strain curves of HSCC are significantly different from those of ordinary concrete and lightweight aggregate concrete, and the constitutive equation proposed in the paper effectively reflect the variation of the stress-strain curves of HSCC.

中文翻译：

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高强珊瑚混凝土（HSCC）应力应变关系试验研究

近几十年来，随着珊瑚礁建设的进步，珊瑚混凝土的设计和生产开始兴起。然而，目前的研究主要集中在中低强度等级，高强度珊瑚混凝土（HSCC）的探索还处于起步阶段。因此，本文采用单轴压缩试验和微观平均方法研究了不同强度等级和纤维的HSCC的应力应变全曲线、裂纹扩展和损伤特征。研究结果表明，在达到峰值应力后，不同强度等级的HSCC应力急剧下降，其残余应力为峰值应力的21.5%~30.3%，低于普通珊瑚混凝土的29.2%~ 52.5%。含纤维高强珊瑚混凝土裂缝倾角主要集中在62°~70°，表现为延性破坏。此外，高强珊瑚混凝土中的纤维主要通过拉扯和断裂而受到损坏。另外，HSCC应力应变曲线特征点的位置与普通混凝土和轻骨料混凝土有显着差异，本文提出的本构方程有效地反映了HSCC应力应变曲线的变化。