【摘 要】
：
为研究粘贴钢板加固T型混凝土梁的受弯性能及影响因素,对8根不同钢板加固量、混凝土等级、配筋率和U型箍间距的T型混凝土梁进行试验研究.该加固方法能够很好的改善加固梁的受弯性能,裂缝和应变的发展均有所延缓,均表现为受拉钢筋及钢板屈服,受压区混凝土压碎的破坏形态.加固后的T型混凝土梁三个特征荷载均得到显著提高,其中增大钢板的加固量,三个特征荷载的提高幅值较大.U型箍间距增大未造成钢板锚固破坏,因此对特征
【机 构】
：
河北省土木工程诊断、改造与抗灾重点实验室,河北建筑工程学院,河北,张家口075000 河北省土木工
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为研究粘贴钢板加固T型混凝土梁的受弯性能及影响因素,对8根不同钢板加固量、混凝土等级、配筋率和U型箍间距的T型混凝土梁进行试验研究.该加固方法能够很好的改善加固梁的受弯性能,裂缝和应变的发展均有所延缓,均表现为受拉钢筋及钢板屈服,受压区混凝土压碎的破坏形态.加固后的T型混凝土梁三个特征荷载均得到显著提高,其中增大钢板的加固量,三个特征荷载的提高幅值较大.U型箍间距增大未造成钢板锚固破坏,因此对特征荷载影响不大,U型箍对钢板的锚固有效.钢筋屈服前,各组试件抗弯刚度相差不大,钢筋屈服后,加固后的试件抗弯刚度明显提高,钢板加固量变化对抗弯刚度影响显著.钢板加固量、配筋率对钢筋和钢板应变的影响主要体现在混凝土开裂后;不同混凝土等级及U型箍间距对钢筋和钢板应变的发展影响不大.
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