桥梁节段模型测力试验的模型支撑形式问题

首先从一百多年来由于风载引起许多桥梁被毁的事实出发,简单地阐明了桥梁模型风洞试验的重要性。为此,当今全世界许多桥梁专家在桥梁节段模型测力试验和全桥模型风振试验方面做了大量工作。本文重点讨论桥梁节段模型测力试验中模型的支撑形式。最初,利用航空风洞进行试验时,模型的支撑都是底壁支撑,随着专用桥梁风洞的建造和试验技术的发展,在这些专用风洞中普遍采用侧壁支撑,其中包括侧壁单臂支撑和双侧壁支撑。文章还叙述了这些形式的特点和应用。

THE PROBLEMS OF MODEL STRUT TYPES USED IN FORCE MEASUREMENTS OF BRIDGE SECTIONAL MODEL

This paper briefly describes the importance of bridgemodel wind tunnel test,in view of the fact that many bridges were brokenby wind load during more than one hundred years.For this reason,many bridge experts in the world have been doing a lot of experimentalresearch works both on the force measurements of bridge sectional modeland the bridge vibration test activated by wind.We pay more attentionto the discussion of the model strut types used in the force measurementexperiments of bridge sectional model.At first,when experiments weredone in aeronautical wind tunnel,the models were surported on thebottom wall,with the building of the special bridge wind tunnels andthe development of new experimental technique,the struts fixed on sidewall including the simple arm strut and the double arms strut are widelyused.This paper also describes the characteristics and usages of thesetypes of strut.