【摘要】 体外预应力混凝土简支梁的体外索的极限应力取决于整个构件的变形 ,影响因素包括体内配筋、体外索的形状及转向块的设置等 .推导考虑如此多因素的计算公式很困难 ,因此从构件的整体变形入手 ,推导出了以构件的挠度和梁端转角为主要参数的公式 .经过大量的试验数据证明 ,该方法是可靠的 ,比较简单的更多还原

【Abstract】 Ultimate stress in external tendons of external prestressed simple beams is dependent on the global deformation compatibility between the anchorages of tendons. It is influenced by internal steel, profile of external tendons, deviators and so on. It is difficult to derive the formula taking those factors into account. The formula from the global deformation of simple beams is derived, which considers the deflection in the middle of beams and the angles of rotation at the support of beams. It is proved that the formula is reliable in practice by an amount of test results.更多还原