(长安大学建工学院 西安 710061)
［提要］应用结构试验方法和力学方法, 研究了轻钢结构平台次梁的受力和变形性能，获得了10跨连续钢平台型钢次梁加载跨跨中截面挠度的试验公式和理论公式。借助软件ANSYS对试验结果和理论公式进行了验证分析，揭示了平台次梁的实际变形远远小于理论值，原因在于主梁对次梁的约束及铺板参与次梁受力等。研究结果对新建结构的设计和在役结构的使用监控有一定参考价值。
［关键词］ 钢结构 试验分析 有限元方法 跨中挠度 多跨钢梁
Test Study and Theory Analysis on Stress and Deflection of a Multispan Continuous Junior Beam in a Steel Floor/Fu Guangyao，Yuan Weining (Civil Engineering College of Chang'an University, Xi'an 710061, China)
Abstract:By means of structural test and theory analysis method,the stress and deflection of the junior beam of a steel structure floor are studied.The actual deflection value and theoretic deflection value on the middle section of ten spans continuous steel beam are obtained.FEM program ANSYS is  used to check up and verify the theory and test formulary.The cause of the differences is revealed.This research is valuable for new structure design and supervision of  old structure.
Keywords:steel structure; testing measure; finite element method; deflection; multispan steel beam

*长安大学科技基金资助(21712004104)