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冷轧带肋钢筋预应力混凝土空心板在荷载部分卸除后，裂缝具有很好的闭合性。建议在设计此类板时，将裂缝控制方法由按受拉区拉应力控制改为按裂缝开展宽度控制，并完成了１９块冷轧带肋钢筋混凝土空心板的裂缝闭合性能试验，给出了按裂缝开展宽度控制的计算公式。
Cold-rolled ribbed steel prestressed concrete hollow slab in the load part of the demolition, the crack has a good closure. It is suggested that the crack control method should be changed from the tension stress control in the tension zone to the crack width control in the design of such plates and the crack closure performance test of 19 cold-rolled ribbed reinforced concrete hollow slabs is completed. The calculation formula of width control according to the crack.