珊瑚海水混凝土三轴受压力学性能试验研究  

Investigation on mechanical properties of coral seawater concrete in triaxial compression

作　　者：潘明棪 郑祥昊 史航 覃龙寿 陈宗平[1,2,3] PAN Mingyan;ZHENG Xianghao;SHI Hang;TAN Longshou;CHEN Zongping(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Key Laboratory of Disaster Prevention and Structure Safety of the Ministry of Education,Guangxi University,Nanning 530004,China;College of Architecture and Civil Engineering,Nanning University,Nanning 530200,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004 [3]南宁学院土木与建筑工程学院,广西南宁530200

出　　处：《混凝土》2024年第2期83-87,92,共6页Concrete

基　　金：国家自然科学基金(51578163);广西八桂学者专项研究项目(2019[79]);广西科技基地和人才专项(桂科AD21075031);国家级大学生创新创业训练计划项目(202110593069)。

摘　　要：为研究珊瑚海水混凝土的三轴受压力学性能,对24个试件进行常规三轴试验。试验观察了试件的破坏形态,获取其受力破坏全过程的应力-应变曲线。结果表明:随着围压值增大,其破坏形态由竖向劈裂转为斜向剪切和横向断裂;应力-应变曲线上升段斜率增大、峰值点提高、峰点后下降段平缓,其相应峰值应力、峰值应变、弹性模量、耗能均增大,而延性系数则先增后降且最终稳定;侧向围压能延缓初始损伤出现,降低损伤发展速率和程度。In order to study the triaxial compressive mechanical properties of coral seawater concrete,24 specimens were fabricated for conventional triaxial tests.The damage morphology of the specimens and obtained their stress-strain full process curves were observed.The results showed that the damage pattern changed from vertical splitting to oblique shear and transverse fracture with the increase of the circumferential pressure.The slope of the rising section of the stress-strain curve increased,the peak point increased and the falling section after the peak point leveled off.The peak stress,peak strain,elastic modulus and energy dissipation increased,while the ductility coefficient increased and then decreased and finally stabilized.The lateral circumferential pressure could delay the appearance of the initial damage and reduce the rate and degree of damage development.

关 键 词：珊瑚海水混凝土 三轴受压 力学性能 耗能 损伤分析 

分 类 号：TU528.041[建筑科学—建筑技术科学]