根据作者提出的悬臂与单跨对称和非对称弯曲构件中无粘结预应力筋极限应力增量的二次方程解,本文对两类构件α_2 系数的同一性进行了证明。根据试验结果,确定了α_2 系数的取值。由此给出了计算悬臂与单跨对称和非对称弯曲构件中这一变量的二次方程统一表达式。 According to the quadratic equation solution of the limit stress increment of unbonded prestressed tendons in cantilever and single span symmetrical and asymmetrical curved members proposed by the author, the identity of the α_2 coefficients of the two types of members is demonstrated. According to the test results, the value of α_2 coefficient was determined. This gives a unified expression for quadratic equations for this variable in the cantilever and single-span symmetrical and unsymmetrical bending members.