钢纤维混凝土二桩厚承台冲切、剪切承载力试验研究

Experimental research on punching and shearing bearing capacity of steel fiber reinforced concrete thick pile cap with two piles

共制作了30个缩尺模型为1:5的二桩混凝土和钢纤维混凝土承台试件并进行了静载试验。系统地分析了影响钢纤维混凝土二桩承台承载力的主要因素,并应用最小二乘法给出了钢纤维混凝土二桩厚承台抗冲、抗剪承载力的计算公式。与普通钢筋混凝土厚承台相比,其承载力有较大幅度的提高,承台的厚度明显降低。本文建议的公式在工程上具有广泛的适用性,该研究成果为有关规定的修订试验依据。

An experimental research on thirty specimens of steel reinforced concrete and steel fiber reinforced concrete (SFRC) thick pile cap with two piles of 1∶5 model ratio had been conducted. The main factors that affect the bearing capacity of steel fiber reinforced concrete thick pile cap with two piles were analyzed systematically . The calculating formulas about the punching and shearing capacity of SFRC thick caps was developed by the method of least square. By comparing with common reinforced concrete thick cap, the bearing capacity of SFRC thick cap was raised largely, and the cap thickness was reduced obviously. The formula is available and reasonable and it can be used as a reference for revising the relevant specifications.