Open AccessDevelopment of a nomogram to predict the contact stress between an I-girder and a support roller
Author(s) -
Thanin Chanmalai,
ByoungKy Chang,
Kevin Misaro,
Saron Hagos,
Thippesh Bethur Hanumanthareddy
Publication year - 2021
Publication title -
engineering solid mechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 17
eISSN - 2291-8752
pISSN - 2291-8744
DOI - 10.5267/j.esm.2021.7.001
Subject(s) - girder , structural engineering , nomogram , bridge (graph theory) , finite element method , parametric statistics , contact mechanics , stress (linguistics) , engineering , mathematics , physics , medicine , linguistics , statistics , philosophy , optics
The incremental launching method (ILM) is an efficient method of bridge construction primarily suited for environmentally sensitive areas. However, during the bridge launching, there are significant contact stresses between the launching system and the steel bridge girders. These substantial contact stresses can cause damage both on, and just under, the girder surface. Although Hertz contact theory solutions may give an insight into the problem, the accuracy is uncertain due to the presence of complex geometries, loads, and material properties. The complicated structural systems need to rely on numerical modeling such as the finite element analysis which are not always available. The primary objective of this study is to estimate the relationship of the maximum contact stress between an I-girder and a roller using a nomogram. The nomogram is built based on a parametric study with various roller dimensions and loads by numerical modeling. The maximum contact stress from the nomogram can be a useful tool in designing a bridge girder on a support roller.