| 摘要: |
| 【目的】掌握影响碳纤维布（Carbon fibre reinforced polymer/plastic,CFRP）与落叶松和杉木有效粘结长度的木材因素，为CFRP在木结构加固工程中的安全应用提供参考。【方法】 采用单剪与半桥电测试验方法，研究了树种及木材含水率、纹理方向、材面状态对CFRP与木材之间有效粘结长度的影响。【结果】CFRP与木材间存在有效粘结长度，当CFRP与木材间的粘结长度超过该有效粘结长度时，CFRP与木材间的极限粘结承载能力将不再增加；不同树种间有效粘结长度存在差异，在含水率为15%的条件下，CFRP与落叶松木材的有效粘结长度为97～110 mm，与杉木木材的有效粘结长度为111～123 mm；材面状态对CFRP与木材间的有效粘结长度影响较大，刨切材面结合牢靠，峰值荷载较大；木材试验含水率及材面纹理等对CFRP与木材间的有效粘结长度几乎无影响。【结论】在应用CFRP前，应将木材表面刨切平整；CFRP可应用于杉木及落叶松构件的加固工程。 |
| 关键词: 碳纤维布 有效粘结长度 速生材 单剪试验 半桥电测法 |
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| 基金项目:江苏高校优势学科建设工程项目（PAPD） |
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| Study on the effective bond length between CFRP sheets and fast growing wood (Larix olgensis,Cunninghamia lanceolata) |
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| Abstract: |
| 【Objective】The study is to know wooden factors that affect effective bond length between CFRP sheets and Fast-growing wood (Larix olgensis,Cunninghamia lanceolata) so as to provide reference for safe application of CFRP in wood structure engineering.【Method】With an experimental method of single shear and half-bridge electrical test,aspects of species,wood moisture content,wood texture and wood face status have been studied.They have impacts on the effective bond length between CFRP and wood.【Result】The results shows that:the effective bond length between CFRP and wood exists.When the bond length between CFRP and wood is larger than the one mentioned above,ultimate load capacity of connecting between CFRP and wood stops growth.The effective bond length varies in different wood species.When the moisture content is 15%,the effective bond length between CFRP and Larix olgensis is 97-110 mm,Cunninghamia lanceolata 111-123 mm.The face status of wood has a great influence on the effective bond length between CFRP and wood.Samples of sliced surface have a firm strength.The moisture content of wood and texture shows little influence on the effective bond length between CFRP and wood.【Conclusion】Before the application of CFRP,wood surface should be sliced smoothly.CFRP can be applied in fast-growing wood members and reinforcement of their connecting nodes. |
| Key words: Carbon fibre reinforced polymer sheet effective bond length fast-growing wood single shear test half-bridge electrical method |
