组合梁的应力分析与实验

为了精确分析叠梁、加楔块叠梁和整梁的承载能力，采用温克尔假设法和电测实验技术，完成了矩形截面叠梁受力弯曲时的模型简化理论计算与实测分析。研究了同截面、同材料的叠梁、加楔块叠梁的应力分布、内力变化和承载能力。理论和实验均表明：叠梁的应力最大，加楔块叠梁的应力次之，整梁的应力最小。

Stress analysis and experiment of laminated beams

In order to accurately analyze the differences on load carrying ability among laminated beam,laminated beam with wedges and beam as a whole of the same dimension,this paper sets up a model of flection of laminated beams with rectangular cross section by taking advantage of Winkle's foundation assumption method and electric testing technique.The investigation of laminated beam of identical beams,either free of wedges or tightened with two wedges through the interface,is carried out for the stress distribution,inner forces and load carrying ability both theoretically and experimentally.Both theoretical analysis and experimental results show that,under the same external loading condition,internal stress in laminated beam reaches the biggest,the stress in laminated beam tightened with wedges is the second,the stress in a beam as a whole of the same dimension is the last one.2 tabs, 7 figs,6 refs.