| 高温后新旧混凝土粘结的剪切性能研究 |
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| 引用本文： | 郭进军, 宋玉普, 张雷顺. 高温后新旧混凝土粘结的剪切性能研究[J]. 工程力学, 2004, 21(4): 133-138. |
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| 作者姓名： | 郭进军 宋玉普 张雷顺 |
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| 作者单位： | 1.大连理工大学海岸和近海工程国家重点实验室, 辽宁, 大连, 116024;2. 郑州大学环水学院, 河南, 郑州, 450002 |
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| 基金项目： | 国家自然科学基金资助项目(59778045) |
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| 摘 要： | 对先粘结后高温与先高温后粘结两种类型的129块Z形新旧混凝土粘结试件进行了直剪试验,主要考察了温度(常温到900℃)、冷却方式、界面粗糙度和界面剂对粘结面剪切性能的影响.在此基础上,得到了粘结面的剪切滑移曲线,给出了相应的统一计算公式,并建立了先高温后粘结类型的神经网络预测模型,较为系统地对高温后新旧混凝土粘结面的剪切性能进行了研究,以供工程参考.
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| 关 键 词： | 混凝土 剪切性能 高温 新旧混凝土粘结 神经网络 |
| 文章编号： | 1000-4750(2004)04-0133-06 |
| 收稿时间： | 2002-12-15 |
| 修稿时间： | 2003-02-25 |
ON SHEAR BEHAVIOR OF NEW-OLD CONCRETE BONDING AFTER EXPOSURE TO HIGH TEMPERATURE |
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| GUO Jin-jun, SONG Yu-pu, ZHANG Lei-shun. ON SHEAR BEHAVIOR OF NEW-OLD CONCRETE BONDING AFTER EXPOSURE TO HIGH TEMPERATURE[J]. Engineering Mechanics, 2004, 21(4): 133-138. |
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| Authors: | GUO Jin-jun SONG Yu-pu ZHANG Lei-shun |
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| Affiliation: | 1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Liaoning Dalian 116024, China;2. Department of Environment & Conservation Engineering, Zhengzhou University, Henan Zhengzhou 450002, China |
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| Abstract: | This paper presents the direct shear tests of 129 Z shape new-old concrete bond specimens to study bond shear strength. Two types of specimen are considered: bonding before heating and heating before bonding. The influencing factors such as temperature (25℃-900℃), cooling way, interface roughness and interface adhesive agent on bond shear property are studied. Based on the tests, the paper presents the shear stress ~slipping curves of bonding interface and the corresponding unified calculation formula. In addition, a neural net predication model is established for the heating before bonding type specimens. The present systematic investigation of bond surface behavior of new-old concrete after exposure to high temperature may provide references for engineering application. |
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| Keywords: | concrete shear property high temperature new-old concrete bond neural net |
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