STRUCTURAL BEHAVIOUR OF VAULT ROOF UNDER WIND LOADS CONSIDERING CONSTRUCTION BY MANPOWER : A study on the basic structural property of string scissors structure

Saitoh, Masao; Okada, Akira; Miyasato, Naoya

doi:10.3130/aijs.72.95_1

Transactions of AIJ

2007

DOI: 10.3130/aijs.72.95_1

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STRUCTURAL BEHAVIOUR OF VAULT ROOF UNDER WIND LOADS CONSIDERING CONSTRUCTION BY MANPOWER : A study on the basic structural property of string scissors structure

Masao Saitoh

Akira Okada

Naoya Miyasato³

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Cited by 2 publications

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Experimental Study on the Static Characteristics of String Crescent Structure Made From Reusable Parts

TANAKA

2017

Nihon Kenchiku Gakkai Kozokei Ronbunshu

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I proposed Crescent System and String Crescent Structure (SCS). Crescent System secures a reuse function, and SCS is the structure that stabilized Crescent System. I made the models of SCS of the cantilever and did an experiment and analysis. This purpose is to clarify the influence of Crescent part shape and the prestress on structural behavior of SCS. I show consideration based on the result below.1) The stress transmission mechanism between Crescent Parts was estimated, and this mechanism was demonstrated by the experiment and the analysis.2) I analyzed a stress, rigidly and the geometric element, and I was able to estimate the proper value of Minor arc angle.3) Crescent part shape influences the rigidity of SCS. A mechanical role of arms is only the reduction of deformation. 4)A mechanical role of the prestress of the strings is prevention of deformation by slide, and improvement of structural performance of SCS.5) The experimental value accorded with the analysis value in "Load-displacement"and "Load-tension of the string".

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Experimental Study on the Static Characteristics of String Crescent Structure Made From Reusable Parts

TANAKA

2017

Nihon Kenchiku Gakkai Kozokei Ronbunshu

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Numerical Analysis of Reinforcing Effect for Scissors-Type Bridge with Strut Members

Chikahiro

Ario

2022

Applied Sciences

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Recently, a scissor mechanism was efficiently applied in the safety engineering field as an emergency structure owing to the advantages of mobility, transformability, and re-usability. This paper focuses on the advantages of this mechanism and puts forward a deployable emergency bridge called Mobile Bridge as a smart bridge. To deploy this bridge in an emergency situation, the structural safety, such as strength and stiffness, must be ensured through proper reinforcing methods. Several research studies concerning the reinforcing effect to scissors structures have been conducted using a cable and/or strut. However, the reinforcing situation was limited, and it is not clear where and how much reinforcement should be introduced. In this paper, we discuss the reinforcing effect of simple struts through a theoretical and numerical approach. Then, we evaluate their applicability to the Mobile Bridge based on numerical simulation. The advantage of the proposed reinforcing method is evaluated, focusing on the reduction of the bending moment which is the dominant sectional force in the scissor structure. We found the reinforcing effect has a nonlinear relationship between the stress and ratio of extension rigidity. The most effective reinforcing configuration was a double warren truss with the vertical element in a two-unit scissors-type bridge and a double warren truss without the vertical element in a three-unit scissors-type bridge. The necessary sectional area of the strut elements was more than 0.2 times that of the scissors member. These results imply that the smart bridge can enhance its performance by using proper reinforcement of the struts.

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STRUCTURAL BEHAVIOUR OF VAULT ROOF UNDER WIND LOADS CONSIDERING CONSTRUCTION BY MANPOWER : A study on the basic structural property of string scissors structure

Cited by 2 publications

References 2 publications

Experimental Study on the Static Characteristics of String Crescent Structure Made From Reusable Parts

Experimental Study on the Static Characteristics of String Crescent Structure Made From Reusable Parts

Numerical Analysis of Reinforcing Effect for Scissors-Type Bridge with Strut Members

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