版柱接頭以碳纖維貼片補強之貫穿剪力行為

Abstract

本文主要研究碳纖維複合材料貼片補強於鋼筋混凝土版-柱接頭之貫穿剪力行為。試驗探討在不同鋼筋比、混凝土強度及貼片層數下，混凝土版載重-位移關係、載重-應變關係及載重-撓度關係以了解混凝土版補強後之貫穿剪力行為。試驗結果顯示碳纖維貼片可有效的提升雙向版勁度及貫穿剪力強度。在分析過程中，結合纖維貼片材料性質計算出組合斷面撓曲彎矩強度，並導入前人之等值鋼筋比及等值有效深度觀念，代入Moe及各國規範建議之貫穿剪力式以預測試驗結果。比較結果得知，由Moe所提之貫穿剪力計算式較能有效的預測出試驗結果，而各國規範計算之剪力值均較為保守。

This research was conducted to investigate the punching shear behavior of concrete slab-column connections strengthened with carbon fiber-reinforced-plastic (CFRP) Laminates. An experiment was conducted to study the behavior and load-deflection relations in different steel ratio, concrete strength, and numbers of laminate layers. Experimental results reveal that CFRP laminates can effectively increase the stiffness and punching shear strength of the slabs. In order to predict the punching capacity of the strengthened slabs, the steel ratio and depth used in the code provisions were modified to account for the contribution of the CFRP. The calculated results show that code provisions can provide an adequate conservative results.