波纹钢腹板混凝土箱梁的扭转振动分析

在分析箱梁扭转振动的基础上,根据波纹钢腹板混凝土箱梁的特点,推导了波纹钢腹板混凝土箱梁扭转振动的理论计算方法,并考虑了横隔板对扭转振动的影响。制作了波纹钢腹板混凝土箱梁模型,对其进行了动力试验和详细的空间有限元分析,并采用所推导的理论计算方法进行了计算。对理论分析结果、有限元数值计算结果以及动力试验结果的对比表明:推导的理论计算方法具有较高的精度;在波纹钢腹板混凝土箱梁跨内合理设置横隔板能够有效提高箱梁的抗扭刚度,改善其动力性能。

Analysis of Torsional Vibration of Concrete Box-girder with Corrugated Steel Webs

On the basis of analyzing the torsional vibration of box-girder,according to the characteristics of the concrete box-girder with corrugated steel webs,the theoretical calculation method of the torsional vibration of concrete box-girder with corrugated steel webs was deduced.The influence of the diaphragm set on torsional vibration in concrete box-girder was considered.An experimental concrete box-girder model with corrugated steel webs was made;the dynamic test and three-dimensional finite element analysis were done,and the test girder was also calculated by the theoretical calculation method.The theoretical analysis results and the numerical simulating results by the finite element analysis method were contrasted to the dynamic experimental results.The conclusion is that the theoretical analysis method has better precision;the torsional stiffness of concrete box-girder with corrugated steel webs can be effectively enhanced by setting diaphragms rationally and dynamic characteristics of girder can be improved.