| 形状记忆合金混凝土梁力学性能试验研究 |
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| 引用本文： | 崔迪,李宏男,宋钢兵.形状记忆合金混凝土梁力学性能试验研究[J].工程力学,2010(2). |
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| 作者姓名： | 崔迪 李宏男 宋钢兵 |
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| 作者单位： | 大连大学辽宁省高校复杂结构体系灾害预测与防治重点实验室;大连理工大学海岸和近海工程国家重点实验室;休斯敦大学机械工程系; |
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| 基金项目： | 国家自然科学基金重大研究计划重点项目(90815026);;国家“十一五”科技支撑计划重大项目(2006BAJ03A03);;教育部创新团队发展计划项目(IRT0518);;高等学校学科创新引智计划项目(B08014) |
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| 摘 要： | 将超弹性形状记忆合金(简称SMA)绞线作为主筋埋入到混凝土梁中,制成SMA混凝土梁。采用跨中单点加载试验对其进行力学性能测试,并利用同尺寸、同配筋率的钢筋混凝土梁作为参照,比较了各试验梁的承载力、残余变形和残余裂缝,分析了SMA的预应力及SMA与混凝土的粘结情况对试验梁力学性能的影响。结果表明,超弹性SMA绞线可以减小混凝土梁的残余变形和残余裂缝,提高混凝土梁的自修复能力。与普通钢筋混凝土梁相比,开裂后SMA混凝土梁的承载力增加的幅度更大,且粘结情况对梁的承载力有较大的影响。此外,对于无粘结SMA混凝土梁,对SMA绞线施加预应力可以提高混凝土梁的承载力和耗能能力。
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| 关 键 词： | 智能混凝土结构 形状记忆合金 力学性能 试验研究 预应力 |
BEHAVIOR OF SMA REINFORCED CONCRETE BEAM |
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| CUI Di,LI Hong-nan,SONG Gang-bing.BEHAVIOR OF SMA REINFORCED CONCRETE BEAM[J].Engineering Mechanics,2010(2). |
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| Authors: | CUI Di LI Hong-nan SONG Gang-bing |
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| Affiliation: | 1. Key Laboratory for Prediction & Control on Complicated Structure System of the Education Department of Liaoning Province;Dalian University;Dalian;Liaoning 116622;China;2. State Key Laboratory of Coastal and Offshore Engineering;Dalian University of Technology;Liaoning 116024;3. Department of Mechanical Engineering;University of Houston;Houston;Texas 77204;USA |
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| Abstract: | The concrete beams reinforced with shape memory alloy (SMA) strands were made in this study. Single-point on mid-span loading tests were conducted on the beams reinforced with SMA strands and the ordinary reinforced concrete beams with the same dimension and the same reinforcement ratio to compare their mechanical properties, such as bearing capability, residual deflection and residual crack width. The influence of prestress of SMA strands and bonding status between SMA strands and concrete were also analyz... |
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| Keywords: | intelligent concrete structure shape memory alloy mechanical properties experimental study prestress |
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