Shear enhancement in short-span beams with multiple point loads
Author(s)
Vollum, RL
Fang, L
Type
Journal Article
Abstract
EC2 presents two alternative methods for designing short-span beams without shear reinforcement that have multiple point loads close to supports. The simplest option is to reduce the component of shear force owing to loads applied within 2d of the support by the multiple a_v/2d (where a_v is the clear shear span and d is the effective depth). Conversely, the previous UK code BS8110 increases the shear resistance of sections within 2d of the support by 2d/a_v. The two methods are equivalent for single point loads but not for multiple point loads. EC2 also allows short-span beams to be designed with the strut-and-tie method (STM), raising the question of which method to use. This paper compares the predictions of BS8110 and both EC2 methods for a series of beams without shear reinforcement tested at Imperial College London. The beams were loaded with either one or two point loads placed within 2d of the support. This type of loading occurs in structures such as the cross-head beams of bridges. Strut-and-tie modelling is shown to give significantly more realistic predictions of shear strength than the beam design equations of BS8110 and EC2.
Date Issued
2014-09-29
Date Acceptance
2012-12-20
Citation
Engineering a Concrete Future
ISSN
1873-7323
Publisher
Elsevier
Start Page
389
End Page
405
Journal / Book Title
Engineering a Concrete Future
Volume
80
Issue
1
Copyright Statement
© 2014 Elsevier Ltd. All rights reserved. NOTICE: this is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in ENGINEERING STRUCTURES, Vol.: 80, (2014) DOI: 10.1016/j.engstruct.2014.09.010
Description
23.10.14 KB. Ok to add accepted version to spiral, subject to 12 months embargo
Source
fib Symposium 2013
Publication Status
Published
Start Date
2013-04-22
Coverage Spatial
Tel Aviv