两端固支叠合梁的应力分析与实验研究

Stress Analysis and Experimental Research for a Two-End Fixed Laminated Beam

摘要: 本文采用电测实验技术对两端固支约束下钢–铝两种不同材料组合而成的自由叠合梁和完全叠合梁跨中及近固端截面上弯曲正应力分布进行了研究，提出了两种叠合梁的简化模型，给出了两种梁的最大正应力计算公式，将理论分析与电测结果进行了比较。结果表明：本文的理论计算公式适用于两端固支叠梁的弯曲正应力估算。

Abstract: The bending stress distributions of two ends-constrained free and complete plying-up laminated beams at a mid-span and cross-sections adjacent to a fixed end, which are made of two different kinds of steel and aluminum materials, are investigated by means of electrical logging experiment technology. The simplified models of the above two laminated beams are put forward and the corresponding maximum normal stress formulae are presented. The theoretical results are compared with the electrical logging ones. The results show that the present calculation formulae are suitable for the estimation of bending normal stresses for the two end constrained beams.