论文部分内容阅读
分析了现有预应力混凝土梁自振频率理论存在的问题。在修正传统轴压模型的基础上,建立了无限自由度体系下有粘结预应力梁分离式运动微分方程,引入简支梁边界条件,导出了预应力混凝土简支梁固有频率表达式,据此分析了有粘结预应力简支梁动力特性的主要影响因素。通过建立数值模型与理论分析结果进行了对比,两者吻合较好。
The existing problems of natural frequency of prestressed concrete beams are analyzed. Based on the modification of the traditional axial compression model, the discrete differential equation of motion of the bonded prestressed beams under the infinite degree of freedom was established. By introducing the boundary conditions of simply supported beams, the natural frequencies of the prestressed concrete simply supported beams were derived. According to This paper analyzes the main influencing factors of the dynamic characteristics of bonded prestressed simply supported beams. By comparing the results of numerical model and theoretical analysis, the two are in good agreement.