- 摘 要
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宋二瑋， 陸偉東， 岳 孔
（南京工業(yè)大學(xué)土木工程學(xué)院，南京211816）[摘要] 對采用環(huán)氧樹脂粘合FRP板增強(qiáng)膠合木梁的蠕變性能進(jìn)行了分析研究。首先對FRP板增強(qiáng)膠合木梁進(jìn)行了短期荷載分析，得到了初始應(yīng)變和初始曲率。再根據(jù)膠合木、FRP材料的蠕變本構(gòu)關(guān)系，結(jié)合Bresler和Selna提出的應(yīng)力松弛分析方法，進(jìn)行了蠕變分析，得到了恒溫恒濕的條件下膠合木梁橫截面的應(yīng)力、應(yīng)變隨時間變化的函數(shù)。分析結(jié)果可用于膠合木梁長期荷載作用下彎曲性能的計(jì)算和設(shè)計(jì)。
[關(guān)鍵詞] 膠合木梁；FRP增強(qiáng)；蠕變
中圖分類號：TU313.3 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2011) S2-0463-03Study on bending creep behavior of FRP-reinforced glulam beam
Song Erwei, Lu Weidong, Yue Kong
( College of Civil Engineering, Nanjing University of Technology, Nanjing 211816, China)Abstract: The creep performance of glulam beams, which is enhanced by FRP materials bonded with epoxy resin, were analyzed. First, through the short-term load analysis of FRP-reinforced glulam beams, the irutial strain and irutial curvature were obtained. And then, according to material constitutive laws of glulam and FRP, combined with stress relaxation analysis method raised by Bresler and Selna, the creep performance of glulam beams were analyzed. At last, the function of stress and strain changes with time of glulam beams' cross-section is obtained, which is maintained under conditions of constant temperature and humidity. The results can be used for calculation and design of glulam beams bending under long-term load performance.
Keywords: glulam beam; FRP-reinforced; creep
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