| 摘要: |
| 通过试验分析了恒温恒湿条件下不同应力比的普通胶合木梁和FRP板增强胶合木梁的蠕变规律，建立了胶合木梁蠕变模型，并对试验数据进行了拟合，得到了蠕变变形曲线和相对蠕变变形曲线，对受荷期为50a的相对蠕变变形进行了预测.结果表明：使用FRP板增强后，胶合木梁的初始刚度提高，其初始变形减少了27%，50a的相对蠕变变形下降了80%. |
| 关键词: 胶合木 梁 蠕变试验 蠕变变形 |
| DOI：10.3969/j.issn.1007 9629.2013.02.020 |
| 分类号: |
| 基金项目:国家高技术研究发展计划（863计划）项目（2012AA03A204）；江苏省基础研究计划项目（BK2010552） |
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| Experimental Study on Creep Behavior of FRP Reinforced Glulam Beam |
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LU Wei dong, SONG Er wei, YUE Kong, LIU Wei qing
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Institute of Modern Timber Structure, Nanjing University of Technology, Nanjing 211816, China
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| Abstract: |
| Through the experiment, the creep law of glued laminated timber(glulam) beam under different stress ratio were analyzed, the common glulam beam and FRP reinforced glulam beam in constant temperature and humidity conditions. The creep model of glulam were built and also the experimental data were fitted. Draw creep deflection curve and relative creep deflection curve, at last they make a prediction about the relative creep deformation in 50 years. Experiment results show that using FRP reinforced glulam beam, the initial stiffness is improved, the initial deformation rigidity have reduced by 27%, and the relative creep deformation after 50 years have reduced by 80%. |
| Key words: glued laminated timber beam creep testing creep deflection |
