蜂窝型抗震耗能挡块设计及试验研究

DESIGN AND EXPERIMENTAL STUDY OF HONEYCOMB RETAINERS FOR SEISMIC ENERGY-DISSIPATION

应用广泛的梁式桥在地震作用下易发生横向落梁破坏。为了提高挡块在地震作用下限位和耗能效果,基于蜂窝结构轴向压缩耗能的特性并结合双重挡块防落梁抗震构造思想,设计出蜂窝型抗震耗能挡块。应用ABAQUS软件对该挡块进行数值仿真分析,并进行足尺拟静力试验,将两者结果进行对比,发现数值仿真分析与试验结果吻合较好,结构滞回曲线饱满,力学模型清晰。得出以下结论:蜂窝型抗震耗能挡块承载能力强,并且在循环加载过程中没有出现明显的刚度退化现象;结构耗能效果好,结构形式简单,传力明确,可广泛应用到实际工程中。

The girder bridges which have been widely used are prone to occur lateral girder-falling damage under the earthquake action.In order to improve the limit and energy dissipation effect of the retainers under the earthquake action,based on the characteristics of the energy dissipation of the honeycomb structure under axial compression and combined with the design concept of double-retainer in preventing girder falling,a honeycomb type seismic energy-dissipation retainer was designed.The ABAQUS software was used for numerical simulation and analysis of the retainers,and a full-scale quasi-static test was carried out.The results of the numerical simulation and test were compared.It was found that the numerical simulation analysis and the test results were in good agreement,the structural hysteresis curve was full,and the mechanical model was clear.The following conclusions were drawn:the honeycomb-type seismic energy-dissipation block showed a good bearing capacity,and there was no obvious stiffness degradation during the cyclic loading;the structure had good energy dissipation effect,simple structural form,clear force transmission,which could be widely applied to practical engineering.