| 碾压混凝土穿透型诱导缝不同扩展阶段的强度指标试验研究 |
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| 引用本文： | 张小刚,宋玉普,吴智敏,王学志.碾压混凝土穿透型诱导缝不同扩展阶段的强度指标试验研究[J].水力发电,2005,31(6):21-23. |
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| 作者姓名： | 张小刚 宋玉普 吴智敏 王学志 |
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| 作者单位： | 1. 大连理工大学海岸及近海工程国家重点实验室结构分室,辽宁,大连,116024;深圳大学建筑与土木工程学院混凝土耐久性重点实验室,广东,深圳,518060
2. 大连理工大学海岸及近海工程国家重点实验室结构分室,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金项目(50179002) |
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| 摘 要： | 在不同削弱度碾压混凝土轴拉试件的穿透型诱导缝周围粘贴了应变片，得到在不同应力状态下诱导缝应变发展规律为：在加载初期，离缝端不同距离的应变发展较为均匀，数值上相差不突出；随着荷载的增加，应变开始出现不均匀发展，离缝端越远，应变变化越缓慢；当接近最大荷载的阶段，缝端应变急速发展，试件瞬间断裂。应变从均匀发展变为不均匀发展，实质上隐含了诱导缝起裂、稳定发展、失稳断裂的整个过程，针对这一试验现象，结合断裂力学理论，建立了诱导缝不同开裂阶段的远场温度应力强度指标模型。
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| 关 键 词： | 碾压混凝土 穿透型诱导缝 应变发展规律 轴拉试验 等效强度 |
| 文章编号： | 0559-9342(2005)06-0021-03 |
Experimental study on strength of penetrated induced-crack of RCC in different extend moment |
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| Zhang Xiao-gang,SONG Yu-pu,Wu Zhi-min,WANG Xue-zhi.Experimental study on strength of penetrated induced-crack of RCC in different extend moment[J].Water Power,2005,31(6):21-23. |
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| Authors: | Zhang Xiao-gang SONG Yu-pu Wu Zhi-min WANG Xue-zhi |
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| Affiliation: | Zhang Xiao-gang1,2,Song Yu-pu1,Wu Zhi-min1,Wang Xue-zhi1 |
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| Abstract: | Strain slice were placed around penetrated induced crack with different weakened variant in RCC-cuboids specimens in order to study the strain development law. Along with the equivalent incensement of the specimen, an even rise of strain change to uneven rise .The experimental evidences reveal that the variety of strain was slowly when the slice was far off penetrated induced crack. The results of the experiment indicate that induced crack exists cracking initiation, stable growth, and unstable propagation process. As a result, temperature strength model of penetrated induced crack in different extend moment was established. |
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| Keywords: | RCC penetrated induced-crack strain development law axial-tension experiment equivalent strength |
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