【摘要】 考虑预应力建立简支梁桥竖向固有振动理论方程并求解,运用解析与有限元方法对一座实际简支梁桥的固有振动频率进行了计算,并现场测试了结构的基频;深入分析了预应力以及变刚度对简支梁桥竖向固有振动频率的影响。更多还原

【Abstract】 The theoretical equation of natural vibration for a simply supported girder bridge is estab?lished and solved with consideration of prestressing force. The natural vibration frequen?cies are then calculated with analytical and finite element methods for an actual bridge, followed by in-situ test of fundamental frequen?cy. Based on the calculation and testing, the influences of prestressing force and varying rigidity on vertical natural vibration frequencies of simply supported girder bridge are detailed.更多还原