论文部分内容阅读
本文通过在压、弯、剪、扭复合受力下14个试件的试验,讨论了构件的破坏形态、构件的开裂扭矩、初始刚度、延性和极限强度的变化规律。根据变角空间桁架模型建立了压、弯、剪、扭强度相关方程,理论值与试验结果符合较好。在此基础上,结合《混凝土结构设计规范》(GBJ10-89)建立了实用抗扭强度计算公式,它也可以用于在压、弯、扭共同作用下的抗扭强度计算,计算值与试验结果比较偏于安全。最后,对实用公式的适用范围作了初步讨论。
In this paper, the test of 14 specimens under pressure, bending, shearing and torsion combined forces was carried out to discuss the failure modes of the components, the cracking torque of the components, the initial stiffness, ductility and ultimate strength. According to the variable angle space truss model, the related equations of pressure, bending, shear and torsional strength are established. The theoretical values are in good agreement with the experimental results. Based on this, a practical torsional strength calculation formula was established in conjunction with GBJ10-89, which can also be used to calculate the torsional strength, calculated values and tests under the combined action of pressure, bending and twisting. The result is more secure. Finally, a preliminary discussion was made on the scope of application of the utility formula.