结构参数对刚构——连续组合梁桥动力特性的影响分析
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摘要
以龙华松花江特大桥的大跨度刚构—连续组合梁桥为研究对象,采用大型有限元分析程序ANSYS建立该桥的空间计算模型。利用子空间迭代法计算了该桥梁结构的基频与振型,并与动载试验实测基频值进行比较,验证模型分析的正确性。在此基础上改变结构参数重新计算基频,并对结果进行线性回归分析,以此确定各结构参数对刚构—连续组合梁桥的动力特性的影响程度。
Finite element analysis program ANSYS was applied to establish the space computational model for the rigid framework-continuous combination beam bridge in the Longhua Songhuajiang super large-scale bridge. The basic frequency and vibration mode of this bridge were computed by the subspace iteration method. The validity of model analysis was proved according to the actual measured basic frequency value by dynamic test. Then frequency value was recomputed through changing configuration parameters,and a linear regression analysis of the result was made. The influences of all the configuration parameters on dynamic properties of the rigid framework-continuous combination beam bridge could be determined.
Finite element analysis program ANSYS was applied to establish the space computational model for the rigid framework-continuous combination beam bridge in the Longhua Songhuajiang super large-scale bridge. The basic frequency and vibration mode of this bridge were computed by the subspace iteration method. The validity of model analysis was proved according to the actual measured basic frequency value by dynamic test. Then frequency value was recomputed through changing configuration parameters,and a linear regression analysis of the result was made. The influences of all the configuration parameters on dynamic properties of the rigid framework-continuous combination beam bridge could be determined.
引文
[1]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1996.
[2]王文涛.刚构—连续组合梁桥[M].北京:人民交通出版社,1997.
[3]宗周红,赖苍林,林友勤,等.大跨度预应力混凝土连续刚构桥的动力特性分析[J].地震工程与工程振动,2004(3):98-104.
[4]吴游宇,吴卫国,文功启.高墩大跨T构桥动力特性有限元分析[J].武汉理工大学学报,2004,26(2):34-36.
[2]王文涛.刚构—连续组合梁桥[M].北京:人民交通出版社,1997.
[3]宗周红,赖苍林,林友勤,等.大跨度预应力混凝土连续刚构桥的动力特性分析[J].地震工程与工程振动,2004(3):98-104.
[4]吴游宇,吴卫国,文功启.高墩大跨T构桥动力特性有限元分析[J].武汉理工大学学报,2004,26(2):34-36.