| 部分黏结预应力CFRP筋混凝土梁受弯承载力计算公式 |
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| 引用本文： | 谭园,薛伟辰. 部分黏结预应力CFRP筋混凝土梁受弯承载力计算公式[J]. 土木工程学报, 2011, 0(Z1) |
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| 作者姓名： | 谭园 薛伟辰 |
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| 作者单位： | 同济大学; |
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| 基金项目： | 国家自然科学基金(50978193); 交通部西部交通建设科技项目(200631882244) |
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| 摘 要： | 部分黏结预应力CFRP筋混凝土梁中,CFRP筋在梁的两端为有黏结形式,而中间部分为无黏结形式。国内外已有研究表明:与有黏结预应力CFRP筋混凝土梁相比,部分黏结预应力CFRP筋混凝土梁具有较好的延性;与无黏结预应力CFRP筋混凝土梁相比,部分黏结预应力CFRP筋混凝土梁对锚具的依赖性大为减小。基于构件整体变形协调与截面内力平衡条件,建立部分黏结预应力CFRP筋极限应力增量的简化分析模型,提出可考虑不同无黏结段长度比例影响的、部分黏结预应力CFRP筋极限应力增量计算公式,并在此基础上推导不同破坏模式下部分黏结预应力CFRP筋混凝土梁受弯承载力的计算公式,公式计算值与试验结果吻合良好。
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| 关 键 词： | 部分黏结 预应力CFRP筋 极限应力增量 受弯承载力 |
Calculation of the flexural capacity of concrete beams prestressed with partially bonded CFRP tendons |
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| Tan Yuan Xue Weichen. Calculation of the flexural capacity of concrete beams prestressed with partially bonded CFRP tendons[J]. China Civil Engineering Journal, 2011, 0(Z1) |
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| Authors: | Tan Yuan Xue Weichen |
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| Affiliation: | Tan Yuan Xue Weichen(Tongji University,Shanghai 200092,China) |
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| Abstract: | The concrete beam prestressed with partially bonded CFRP tendon was an innovative structural technique,in which the CFRP tendon was unbonded in the middle region of the concrete beam while fully bonded at the two ends.Some studies showed that concrete beams prestressed with partially bonded CFRP tendons exhibited better ductility than the concrete beams prestressed with fully bonded CFRP tendons,and depended less on the anchorage of CFRP tendons compared with the unbonded concrete beams.Based on the compati... |
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| Keywords: | partially bonded CFRP tendon ultimate stress increment flexural capacity |
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