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本文根据冷拔低碳钢丝预应力与非预应力矩形梁板在短期荷载作用下的试验资料,提出了预应力与非预应力混凝土(以下简称加筋混凝土)受弯构件的裂缝平均间距、预应力与非预应力钢丝应变增量不均匀系数、平均裂缝宽度的计算公式及其与试验结果的比较。最后,在统计、分析试验资料的基础上,提出了在短期荷载作用下,具有足够保证率的裂缝宽度扩大系数和最大裂缝宽度的计算公式。
Based on the test data of the prestressed and non-prestressed rectangular beam slabs under cold-drawn steel wire under short-term loading, this paper presents the average crack spacing and pre-stress of pre-stressed and non-prestressed concrete (hereinafter referred to as reinforced concrete) flexural members. Calculation formulae of non-uniform strain coefficient and average crack width for stress and non-prestressed steel wire, and comparison with test results. Finally, on the basis of statistics and analysis of experimental data, the calculation formula of crack width expansion factor and maximum crack width with sufficient guarantee rate under short-term load is proposed.