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Abstract

Explosions from terrorist attacks are one of the most dangerous types of loads as it tends to weaken the structure and then be followed by fire. The column response depends on the explosive size and distance to the structure. The thermal load that is produced afterwards is expected to cause more damage to the structure in most real-life scenarios. The model proposed in this paper is considered accurate in simulating concrete encased steel column (CESC) behaviour.
In this paper, concrete encased steel columns (CESC) is parametrically investigated using LUSAS finite element analysis solver based on transient, non-linear, and semi-coupled analysis. The parametric study analyses the structure by applying it directly to the surface of the column the blast (0.108 N/mm2) and thermal (900 °C) load and examines the effects of each parameter of concrete’s compressive strength MPa and thickness of the cover. Secondary data from previous research is used, along with data obtained from thermal and blast loads calculations.
The parametrical results were validated against other studies with a similar type of structural material used. The response of the column to both parameters is presented in the form of graphsand tables. The findings indicated that concrete-encased steel columns (CESC) demonstrated excellent resistances under static and dynamic loading conditions. The results are discussed in detail, the accuracy and limitation of this paper are presented in an orderly manner. The results from the concrete parameters study show that concrete compressive strength MPa has a limited effect on blast resistance and thermal load. Additionally, future study opportunities are given based on the findings, and a summary of recommendations is presented at the end of this paper.

Course: Civil Engineering with Structural Engineering - MSc - C1369

Date Deposited: 2022-03-04

URI/permalink: https://library.port.ac.uk/dissert/dis13861.html