预制空心方桩抗弯承载力研究

Research of Flexural Capacity of Precast Hollow Square Piles

通常的混凝土受弯承载力计算均采用混凝土屈服模型.本文对预制空心方桩抗弯承载力计算采用钢筋屈服模型.在该模型基础上,推导出预制空心方桩抗弯承载力计算公式.通过对比两种计算结果表明:在构件配筋率高的情况下,按混凝土屈服模型更符合实际又偏于安全;在构件配筋率低的情况下,按钢筋屈服模型更符合实际且偏于安全.

Usually the concrete yield model is used to calculate concrete flexural bearing capacity. In this paper, the steel yield model is used to calculate the bearing capacity of precast hollow square pile. On the model basis,the calculation formula of bearing capacity of precast hollow square pile is derived. According to the comparision, a conclusion indicates that the concrete yield model is real and safe when reinforcement ratio of precast hollow square pile is big;meanwhile,the steel yield model is real and safe when reinforcement ratio of precast hollow square pile is small.