地铁车站地下拱型结构的光弹性应力分析

Stress Analysis of Photoelasticity forthe Underground Arch Structure of Subway Station

本文用三维光弹性法，对地铁车站地下拱型结构进行了实验应力分析并绘出主应力迹线。文中还提出对加压用乳胶气囊进行高温、高压预处理工艺，使乳胶气囊和模型曲面很好地吻合，从而提高了加载的准确度。

In this paper,the experimental stress analysis for the underground. arch-structure ofBeijing subway station with three dimensional photoelasticity iS reported, and the principal stresstrajectories are also drawn. In the experiments, the new technology for the loading emulsion gasbaywhich is pretreated by high temperature and high pressure is susgested,so that the emulsion gasbagcoincides exactly with the curve surface of the model. The loading precision is improved.