Internal Force Analysis of a Planar Truss Based on Electrical Measurement Experiments and Theoretical Calculations

Abstract

In this paper we aim to study the distribution law of internal forces in planar truss structures by selecting a classical planar truss as our research object and compare their theoretical calculation with electrical measurement experiment. We show there is a difference between the theory calculation value and the experimental value which was due to the joint structure of the truss, the machining accuracy of the members, the self-weight of the members and the accuracy of the measurement equipment. Designing an actual truss structure needs to reserve enough safety margin to ensure the structural safety and do regular inspection on structural deformation when using to detect problems at an early stage.