Research on reduction of thermal stress induced in steel member by bonding carbon fiber

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  • 炭素繊維接着によって鋼板に生じる熱応力の低減工法に関する研究
  • タンソ センイ セッチャク ニ ヨッテ コウバン ニ ショウジル ネツ オウリョク ノ テイゲン コウホウ ニ カンスル ケンキュウ

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Abstract

In steel members bonded with carbon-fiber reinforced polymer (CFRP) plate, the thermal stresses are introduced in the steel members, the CFRP plates and the adhesive layers when temperature changes because the linear thermal expansion coefficients of steel and CFRP are mismatched. In the previous paper, the authors proposed a technique to reduce thermal stress in steel members strengthened by CFRP plate, which involves bonding aluminum alloy plates with CFRP plates. In this research, the thermal stress introduced in the steel plate with CFRP and aluminum plates was measured over one year. As the result, it was shown the thermal stress in steel plate was neglectable small through the all-season. Additionally, a steel plate bonded carbon fiber strand sheets and aluminium plates side by side was tested. In this method, the thermal stress induced in steel plate was also reduced.

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