部分预应力混凝土受弯构件裂缝宽度的计算

Calculation of the Crack Width of Partially Prestressed Concrete Flexure Member

在分析52根部分预应力混凝土受弯构件的试验资料的基础上,探讨了其裂缝宽度计算的主要参数:平均裂缝间距、裂缝截面处纵向受拉钢筋应力及其不均匀系数和最大裂缝宽度扩大系数等,提出了部分预应力混凝土受弯构件裂缝宽度的计算公式.建议的计算公式物理概念明确,计算简单,计算值与试验结果符合较好.

In this paper,based on the test results of 52 test samples,the crack width of partially prestressed concrete flexure member is studied.For which the primary factors,such as average crack spacing,tensile steel stress at cracked section,nonuniformity coefficient of tensile steel stress,and magni- fication coefficient of maximum crack width,are investigated and the calcu- lation formulas are given.The physical conception of the formulas is clear, the calculation is simple,and the values calculated by the formulas accord with the test results satisfactorily.