型钢高延性混凝土短梁抗剪性能试验研究

发布时间：2018-03-09 17:25

本文选题：高延性混凝土　切入点：短梁　出处：《建筑结构学报》2015年10期 　论文类型：期刊论文

【摘要】：提出采用高延性纤维混凝土改善型钢高强混凝土短梁的抗剪性能和变形能力,设计了6个高延性纤维混凝土梁(其中4个为型钢高延性混凝土短梁,2个为高延性混凝土短梁)试件和作为对比的3个混凝土梁(其中1个为型钢混凝土短梁,2个为普通混凝土短梁)试件,通过静力试验研究不同剪跨比高延性混凝土梁的破坏形态、受剪承载力和变形能力。试验结果表明:采用高延性纤维混凝土,可显著提高短梁的受剪承载力和变形能力,实现延性剪切破坏模式;发生挤压破坏的型钢高延性混凝土短梁,受剪承载力高、延性好,破坏以后仍具有较好的完整性;与型钢混凝土短梁相比,发生剪切黏结破坏的型钢高延性混凝土短梁损伤程度较小,试件破坏以后仍具有较高的剩余承载力。建立了型钢高延性混凝土短梁的受剪承载力计算式,计算结果与试验结果吻合较好。
[Abstract]:High ductile fiber reinforced concrete (SFRC) is used to improve the shear behavior and deformation ability of short beam with steel and high strength concrete. Six specimens of fiber reinforced concrete beams with high ductility (4 short steel reinforced concrete beams and 2 high ductile concrete short beams) were designed and compared with 3 concrete beams (one of which was steel reinforced concrete short beam). One is a short beam of ordinary concrete), The failure modes, shear bearing capacity and deformation capacity of high ductile concrete beams with different shear span ratios are studied by static test. The experimental results show that the shear bearing capacity and deformation capacity of short beams can be significantly improved by using high ductile fiber reinforced concrete. The failure mode of ductile shear is realized; the short beam with high ductility and high ductility has high shear bearing capacity and good ductility, and it still has good integrity after failure, compared with the short beam with steel reinforced concrete, the shear strength of the short beam with high ductility is higher than that of the short beam with high ductility. The damage degree of high ductile reinforced concrete short beam with shear bond failure is small, and the residual bearing capacity of the specimen is still high after failure. A formula for calculating the shear capacity of high ductile concrete short beam is established. The calculated results are in good agreement with the experimental results.
【作者单位】：西安建筑科技大学土木工程学院;成都基准方中建筑设计有限公司;中铁第一勘察设计院集团有限公司;
【基金】：国家自然科学基金项目(51578445) 西安市科技计划项目(CX13135-3)
【分类号】：TU398.9

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