GINA止水带力学性能数值模拟与试验研究

Numerical Simulation and Experimental Study of Mechanical Properties of GINA Waterstop

文章对沉管隧道GINA止水带的有限元建模方式进行了分析与比较,建立了二维及三维止水带有限元模型,对止水带竖向压缩位移、竖向接触压力、橡胶最大主应变及加压工装竖向反力进行了分析,比较了止水带数值模拟结果与试验检测结果。结果表明:GINA止水带二维及三维有限元模型的分析结果存在较大差异,止水带三维模型加压工装竖向反力数值模拟结果与试验检测结果基本吻合,验证了止水带三维模型分析结果的合理性;三维有限元模型的数值模拟结果与止水带纵向长度及环向周长都没有关系,可以用缩比模型进行GINA止水带的数值模拟与试验研究,且优先采用分段式GINA止水带进行有限元建模,更加省时、高效、精确。

Through analysis and comparison of the finite element modeling methods for GINA waterstop in immersed tube tunnels,it establishes 2D and 3D finite element models for the waterstop,analyzes vertical compression displacement and contact pressure of the waterstop,maximum principal strain of the rubber and vertical reaction force of loading tools,as well as finally compares the numerical simulation and test results of the waterstop.The results show that there are great differences between 2D and 3D finite element models of GINA waterstop in terms of analysis results.As for the 3D model of the waterstop,the numerical simulation results of the vertical reaction force of the loading tools are basically consistent with the test results,which verifies that the analysis results of the waterstop 3D model are rational;the numerical simulation results of the 3D finite element model are independent of the longitudinal length and circumferential perimeter of the waterstop.And so the scaled model can be used to perform numerical simulation and experimental study of GINA waterstop,with the priority of the segmented GINA waterstop for finite element modeling,as its more time-saving,efficiency and accuracy.