QUT ePrints

Behaviour of axially loaded concrete columns subjected to transverse impact loads

Thilakarathna, Herath Mudiyanselage Indika, Thambiratnam, David P., Dhanasekar, Sekar, & Perera, Nimal J. (2009) Behaviour of axially loaded concrete columns subjected to transverse impact loads. In Our World in Concrete and Structures : Green Concrete, 16-18 August 2009, Orchard Plaza, Singapore.

Abstract

Increased industrialisation has brought to the forefront the susceptibility of concrete columns in both buildings and bridges to vehicle impacts. Accurate vulnerability assessments are crucial in the design process due to the possible catastrophic nature of the failures that can occur. This paper reports on research undertaken to investigate the vulnerability of columns in low to medium rise buildings, designed according to the Australian standards. Numerical simulation techniques were used and validation was done by using experimental results published in the literature. The material model formulation used for validation is scrutinised and numerical tests are preformed to examine its ability to simulate the impact conditions.

Axially loaded columns made out of grade 40 to 50 concrete with two different steel ratios are considered in the analyses. It is found that typical columns in five storey buildings, having a high slenderness ratio of 13.33, are highly vulnerable to medium velocity car impacts [1]. The investigations are continued with different combinations of parameters to identify the means to mitigate damage. It is observed that the design option with low amount of steel significantly improves impact capacity while a higher grade of concrete considerably increases the vulnerability of the impact, contrary to what would be expected. However, further improvements can be made when smaller slenderness ratios are selected. In particular, influences of time of impact and iso-damage conditions are investigated in detail. It has also been found that vehicle impacts can be categorised next to the quasi-static loading region in typical force-impulse diagrams. This will allow numerical methods to be implemented to quantify the impact damages. Key words: Dynamic analysis, Numerical simulations, Lateral impact, Structural columns

Impact and interest:

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

1,288 since deposited on 11 Jun 2009
515 in the past twelve months

Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 21095
Item Type: Conference Paper
Additional URLs:
Keywords: Dynamic analysis, Numerical simulations, Lateral impact, Structural columns
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2009 [please consult the authors]
Deposited On: 11 Jun 2009 11:06
Last Modified: 29 Feb 2012 23:55

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page