【摘要】 本文概要地介绍了允许出现裂缝的部分预应力混凝土梁斜截面疲劳性能的试验研究结果。文中分析了在重复荷载作用下梁内混凝土承受的剪力和箍筋应力的变化规律。提出了有斜裂缝梁内的混凝土承受的剪力和箍筋应力的计算方法。建议方法计算结果与试验结果比较表明,两者符合良好。文中给出了计算例题。更多还原

【Abstract】 The test research results on fatigue behaviour of inclined section of crack-permitted partially prestressed concrete beams are briefly described in this paper. The shear carried by the concrete and the tendon and the variations of stirrup stress in beams under repeated loading have been analyzed. The method for calculating the shear carried by the concrete and the stirrup stress in beams with inclined cracks are suggested in the paper. Results obtained by the proposed method have been compared with those from test. The comparison shows good agreement between them. Calculating examples are also given in this paper.更多还原