在使用荷载下出现裂缝的部分预应力砼梁裂缝宽度的计算

Calculation of Crack Width in Partially Prestressed Concrete Beams under Service Load

本文在分析65根部分预应力砼梁试验资料的基础上,研究了部分预应力砼梁裂缝开展规律及影响裂缝宽度的主要参数,并提出了有粘结和无粘结部分预应力砼梁裂缝宽度的计算模式和公式。通过建议公式的计算结果与试验结果比较,两者符合较好。

Based on the test results of 65 partially prestressed concrete flexure beams, the distribution and development of cracks in partially prestressed concrete beams and the main factors influencing crack width of the beams are investigated in this paper. The calculation model and formulas for crack width in beams with bonded tendons and unbonded tendons are presented. The values calculated by the proposed formulas are in accord with the test results satisfactorily.