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Structural evaluation of bow string and network arch bridge with different design parameters and bracings
K. Rane, , , S. Sangtiani
Published in IAEME Publication
2018
Volume: 9
   
Issue: 3
Pages: 671 - 682
Abstract
Tied arch bridges have significant advantages in economical and atheistic appearance which provide suitable option for bridges of long span. The aim of this paper is to evaluate different type of tied arch bridges subjected to traffic loading, wind loading and temperature loading as per IRC code by using MIDAS-Civil software and comparing the results. To do so, bridge of span 60m sustained by cross girder 5m apart with rise of arch 15% to 19% of span with one lane and two lane traffic along with different hanger system such as vertical hanger (bowstring), Neilsen hanger with different angles and V-hanger system are modeled. Arch height to span length ratio has significance for optimizing the steel quantity of main girder of bridge as the arch acts in compression form, due to arch action the forces resolved and transferred to main girder. By conducting following analysis, two aims are: Eigen value method is used to find the appropriate wind bracing system for bridge among cross beam, K-bracing and X-bracing by evaluating and comparing the behavior of mode shapes, frequency and time period. P-Δ analysis is done to observe the rise in bending moment in members due to secondary moments caused by the primary deflections. © 2018 IAEME Publication. All rights reserved.
About the journal
JournalInternational Journal of Civil Engineering and Technology
PublisherIAEME Publication
ISSN09766308