Citation

Juozapaitis A, Norkus A. Balt. J. Road Bridge Eng. 2007; 2(4): 173-181.

Copyright

(Copyright © 2007, Vilnius Gediminas Technical University, Publisher Technika)

DOI

unavailable

PMID

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Abstract

High strength cables, steel plates, or prestressed RC members (also named as stress-ribbons) usually serve as the main load carrying elements of up-to-date pedestrian bridge structures. An application of these elements is prescribed actually by a large magnitude of permanent load. However, a realization of such structures requires many material resources. This paper presents an advanced structure type for pedestrian suspension bridges created from hot-rolled cable or welded members of finite flexural stiffness. Development of displacements in such a structure subjected to symmetric and asymmetric loadings is studied. A method of stabilizing displacements via flexural stiffness variation and its efficiency is considered. Displacement variation and strength of advanced load carrying capacity of structure are investigated, and developed analytical expressions for determining inner forces and displacements are presented. An analysis of rational parameters for advanced structure of pedestrian suspension bridges yields expressions for determining necessary flexural stiffness, cross-sectional height, and area of load carrying structural elements. A rational primary structural shape vs. ratio of permanent and variable loadings is analyzed. A technical-economic efficiency is illustrated via numerical simulation of rational parameters for advanced structure of pedestrian bridge.