- 摘 要
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曹雙寅1 孫永新1 夏存衛(wèi)2 朱海峰1 徐俊2 翟瑞興1（1 東南大學(xué) 南京 210096； 2 常州房屋安全鑒定所）
[提要] 通過10根外部粘鋼加固鋼筋混凝土梁的斜截面抗剪試驗，研究了外貼U型鋼板、梁側(cè)豎直鋼板、梁側(cè)斜鋼板和梁側(cè)鋼絲網(wǎng)對梁的加固效果。試驗結(jié)果表明：梁側(cè)鋼板角度對粘鋼加固效果有明顯的影響，采用450斜向粘鋼效果最好；由于錨固長度較短，易產(chǎn)生錨固破壞，應(yīng)用時必須采取可靠的附加錨固措施；外部粘貼鋼絲網(wǎng)無論是對提高抗裂能力還是承載能力都有明顯的效果。通過理論分析，提出了粘鋼加固梁斜截面的抗剪計算公式，與試驗值吻合較好。
[關(guān)鍵詞] 鋼筋混凝土梁 粘鋼加固 試驗研究 加固形式 破壞形態(tài) 抗剪承載力Through the test of 10 pieces of R C beams strengthened by bonded steel, the strengthening results of beams reinforced with U-shape steel strip, up-right and inclined steel strip on side surface and steel net have been analyzed. The results show that the inclined angle of steel strip has obvious influence on the strenghening,which has the best result when the angle is 450; due to the shorter anchorlength, the anchor destroy may happen easily, so additional anchor methods must be taken; bonded steel net has the obvious results to raising both the crack-resisting capacity and load-bearing capacity. A computing formula is advanced, and the calculated results coincide with the experiment results well.
Keywords: R C beams; strengtherung;bonded steel;experiment, analysis;forms;failure mechanism; shear-bearing capacity
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