EFFECT OF CORE DRILLING ON LOAD CARRYING CAPACITY OF RC COLUMNS | ||
| International Journal of Advances in Structural and Geotechnical Engineering | ||
| Volume 03, Issue 01, February 2019, Pages 82-92 PDF (1.14 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/asge.2019.271007 | ||
| Abstract | ||
| As a common practice, concrete core test is one of the most significant investigations that can reasonably predict the in-situ concrete compressive strength of existing reinforced concrete elements. This test is categorized as a destructive test and has a direct impact on the column strength. In general, the testing specifications do not mention on the influence of core test on the column strength reduction. This paper presents a numerical study to investigate the RC column loading carrying capacity after extracting the core specimen. The analytical program consists of forty five full-scale columns with height of 3000 mm. The aspect ratios for the utilized column cross sections are (a/b) equal to 1, 1.33, 1.5, 2.33 and 3. Effect of the length to diameter ratio of the core hole (L/D) of values 1, 1.5 and 2 was studied. In addition, different concrete compressive strength were used to study the effect of concrete strength. The columns are axially loaded till failure. Finite Element Analysis (FEM) are used to model the specimens using the ABAQUS program. The Numerical models present all the above varying parameters. In addition, traditional analysis are carried out to predict the column carrying load with and without the core hole for the above mentioned parameters. The prediction was done using the equations stated by the Egyptian Code of Practice (ECP 203-2018)[1] and (ACI 318)[2] to predict the compression strength with a hole due to coring. The study showed good agreement of the results from the numerical models and the calculated code equations. Finally, recommendations are given for the reduction in the RC column load carrying capacity under the effect of core hole. | ||
| Keywords | ||
| ABAQUS; Core Test; Finite Element; Load Carrying Capacity; RC Column | ||
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