| 邓宗才,李庆斌,傅 华.人工骨料全级配大坝混凝土的拉压力学性能[J].水利学报,2005,36(2):0214-0218 |
| 人工骨料全级配大坝混凝土的拉压力学性能 |
| Tensile and compressive behaviors of full grade concrete made of crushed coarse aggregate |
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| DOI： |
| 中文关键词: 单轴荷载 裂缝 大坝混凝土 应力-变形全曲线 断裂 龄期 大尺寸试件 |
| 英文关键词: full grade concrete crushed coarse aggregate uniaxial tension-compression test relationship between stress and strain crack age |
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| 摘要点击次数: 2560 |
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| 中文摘要: |
| 用大尺寸试件试验研究了全级配大坝混凝土在单轴拉伸与压缩荷载下的力学性能，并研究了龄期对混凝土性能的影响，给出了单轴拉伸和压缩的应力-应变全曲线及相对拉应力与相对裂缝宽度曲线。试验发现，龄期增加，混凝土的强度、弹性模量及断裂能提高，龄期对极限应变和最大裂缝宽度的影响不明显。双曲线方程可以用于表述混凝土强度、弹性模量及断裂能等力学参数与龄期的关系。 |
| 英文摘要: |
| The behaviors of full grade concrete specimens made of crushed coarse aggregate are studied by uniaxial tension-compression test. The influence of curing age is taken into account. The relationship between stress and strain under the action of uniaxial tension (or compression) is obtained and the expression of relationship between tensile stress and crack width is suggested. It is found that the strength, elastic modulus and fracture energy increase with the increase of specimen age in hyperbolic curve forms, and ultimate strain and maximum crack width is independent of the curing age. |
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