| 多向压复合应力状态下A-E-C的强度性能研究 |
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| 引用本文： | 商怀帅,;芦怡,;李荣侠,;卢晓梅. 多向压复合应力状态下A-E-C的强度性能研究[J]. 青岛理工大学学报, 2014, 0(2): 1-7 |
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| 作者姓名： | 商怀帅, 芦怡, 李荣侠, 卢晓梅 |
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| 作者单位： | [1]青岛理工大学蓝色经济区工程建设与安全协同创新中心,青岛266033; [2]武汉大学水资源与水电工程科学国家重点实验室,武汉430072; [3]潍坊泰和置业有限公司,潍坊261000 |
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| 基金项目： | 国家自然科学基金资助项目（51208273）;山东省高等学校科技计划项目（J12LG07）;水资源与水电工程科学国家重点实验室开放研究基金资助项目（GZ1206）;中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放研究基金资助项目（IWHR-SKL-201305） |
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| 摘 要： | 为准确认识引气混凝土(A-E-C)在多向压复合应力状态下的强度性能,通过试验对立方体强度为C30的A-E-C进行了单向压、双向压(应力比α=σ2∶σ3=0.25∶1.0,0.50∶1.0,0.75∶1.0,1.0∶1.0)以及三向压(应力比α=σ1∶σ2∶σ3=0.1∶0.25∶1,0.1∶0.5∶1,0.1∶0.75∶1,0.1∶1∶1)加载状态下的强度特性研究.对试件的破坏形态以及6个面上裂缝的走向进行了观察描述,根据试验结果,分析了应力比对多向压复合状态下A-E-C的极限强度的影响规律;并与在单向压、多向压(双向压以及三向压)复杂荷载作用下普通混凝土的研究内容进行了比较分析.在此基础上,建立了相应的破坏准则,为A-E-C结构的有限元分析提供了试验、理论依据.
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| 关 键 词： | 引气混凝土(A-E-C) 应力比 复合应力 破坏准则 |
Study on strength of air-entrained concrete under combined multriaxial compression stresses |
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| Affiliation: | SHANG Huai-shuai1 , LU Yi, LI Rong-xi, LU Xiao-mei(1. Collaborative Innovation Center of Engineering Construction and Safety in Shangdong Blue Economic Zone, Qingdao Technological University, Qingdao 266033, China; 2. State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University, Wuhan 430072, China; 3. Weifang Taihe Investment Company Limited, Weifang 261000, China) |
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| Abstract: | To accurately understand the strength performance of air-entrained concrete （A-E- C） under combined multiaxial compression stresses state, properties of C30 air-entrained concrete under uniaxial compression, biaxial compression （stress ratio a=σ2 ：σ3 = 0. 25 ：1.0, 0.50 ： 1.0, 0.75 ： 1.0, 1.0： 1.0） and triaxial compression （stress ratio a= σ1：σ2 a2：σ3= 0.1 ： 0.25 ： 1,0.1 ： 0.5 ： 1, 0.1： 0.75 ： 1, 0.1 ： 1： 1） are investigated in this paper.The failure characteristic of specimens and the direction of superficial cracking are observed. Based on the test data, the influence of stress ratio on the ultimate compressive strength is analyzed respectively. The comparison and analysis between the experimental results in this paper and the experimental results got by other authors are given. The failure criterion withconsideration of the influence of stress ratio is proposed which provides the experimental and theory founda- tions for strength analysis of air-entrained concrete structures subject to complex loading in cold marine environment. |
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| Keywords: | air-entrained concrete（A-E-C） stress ratio combined multriaxial compression stresses failure criteria |
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