- 李清海，趙嬌嬌，李清原，高建偉，吳玉姣，周勝男
2020年第11期
摘要
引用本文
摘 ? 要：采用不同配筋率（0~1.20%）鋼絲網片對混凝土外墻掛板進行增強增韌，通過四點彎曲強度-撓度曲線，結合混凝土試件開裂過程的試驗現象，分析了配筋率對混凝土外墻掛板在彎曲荷載作用下不同階段強度、撓度的影響規律。結果表明，試件的比例極限強度、破壞強度及其對應撓度均隨配筋率的增加呈線性增加趨勢，配筋率增至1.20%時，試件比例極限強度、破壞強度分別比空白試件提高了5.33倍、3.53倍，同時試件的比例極限撓度和破壞撓度分別提高了3.77倍和3.57倍。配筋率對試件非線性變形階段的作用效果較準彈性階段更為顯著。通過對不同階段強度及其對應撓度與配筋率的擬合分析，得出強度、撓度與配筋率的數學關系，為混凝土外墻掛板的高性能結構設計提供依據。
Abstract: The steel mesh was used to strengthen and toughen concrete exterior wallboard with different reinforcement ratio(0~1.20%). Based on the strength-deflection curve of four point bending and the experimental phenomenon of concrete cracking process, the influence of reinforcement ratio on the strength and deflection of concrete exterior wallboard at different stages was analyzed. The results show that the proportional ultimate strength and failure strength with the corresponding deflection of the specimens increase with the increase of reinforcement ratio. When the reinforcement ratio increases to 1.20%, the proportional ultimate strength and failure strength of the specimens are 5.33 times and 3.53 times higher than those of the specimens without steel mesh respectively, and the proportional ultimate deflection and failure deflection of the specimens are 3.77 times and 3.57 times higher respectively. The effect of reinforcement ratio on the nonlinear deformation stage is more significant than that of quasi elastic stage. Through the fitting analysis of strength and corresponding deflection with reinforcement ratio at different stages, the mathematical relationship can be obtained between the strength and deflection with the reinforcement ratio, which provides the basis for the high-performance structural design of concrete exterior wallboard.
李清海,趙嬌嬌,李清原,等.鋼絲網片增強混凝土外墻掛板抗彎性能研究[J].混凝土與水泥制品,2020(11):66-70.
LI Q H,ZHAO J J,LI Q Y,et al.Study on the Flexural Performance of Steel Mesh Reinforced Concrete Exterior Wallboard[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):66-70.
