ETFEフィルムを用いたばねストラット式張力膜構造の応力弛緩に関する研究 : 安定ひずみの評価と応力-ひずみモデルの提案

概要

論文の詳細を見る
ETFE-film has the characteristics of weak strength, low rigidity and large creep strain. By the authors' researches in the past, as the applicable structural system considering the characteristic of ETFE-film, the tensile membrane structure with a spring-strut system was proposed. And this research clarified an availability of this system from the point of the allowable stress design method. In this paper, the authors focus on importance of stress relaxation for tensile membrane structures using ETFE-film with spring-strut system and propose the design approach of this system. From the view of those points, in this paper, the following points are discussed, 1. Focusing on physical properties called a crystallization of the ETFE-flim, material tests based on hysteretic loading and re-tension introduction are executed. 2. By the results of these tests, "stable strain" is evaluated and the constitutive equations are obtained. 3. The structural behaviors about stress relaxation of tensile membrane structures with spring-strut system are shown and also the guide on the design is proposed.
2010-03-27