冷轧带肋钢筋预应力混凝土空心板抗裂性能的试验研究

Experimental Study on Crack Resistance of Prestressed Hollow Core Slabs Reinforced with Cold Rolled Ribbed Bars

１９块冷轧带肋钢筋预应力混凝土空心板的短期试验结果表明，这种板具有良好的抗裂性能．本文分析了其开裂荷载实测值高于理论计算值的原因，建议将其拉应力限制系数αｃｔ，ｓ由０．６０提高至０．７０，αｃｔ，ｌ由０．２５提高至０．３５，从而降低用钢量，有利于推广这一新型建材．

The results of short term experiment of 19 prestressed hollow core slabs reinforced with cold rolled ribbed bars show that the crack resistance behavior of the slabs is good and the reasons are presented in this paper.We propose raising the tension stress limit coefficient of short term load from 0.60 to 0.70,and the coefficient of long term load from 0.25 to 0.35.This proposal is helpful to utilizing the new type building material.