铁路简支现浇箱梁双层贝雷梁预压试验研究

摘要

Combining with the engineering cases,the paper introduces the pre-pressure scheme for the double-layer bailey beam of simply suppor-ted cast-in-situ box on railways,calculates and analyzes the stress and deformation parameter under the pre-pressure loading,proves that the sup-port’s deflection and reduction and increase of the stress measurement and pre-pressure loading show the linear changes,and the support system with weaker stress of individual components can be improved.%结合工程实例，介绍了铁路简支现浇箱梁双层贝雷梁预压方案，计算分析了预压荷载作用下支架的应力和变形参数，结果表明，在预压加载的过程中，支架的挠度和应力实测值与预压荷载的增减呈线性变化，支架系统个别构件弹性受力较差，应予以加强。