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EFFECT OF ELEVATED TEMPERATURE ON CONCRETE STRUCTURES BY BOUNDARY ELEMENTS

Association of Civil Engineers and Czech Technical University in Prague, Civil Engineering, Thakurova 7, 166 29 Prague 6, Czech Republic

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TAT S. LOK

Nanyang Technological University, Civil and Environmental Engineering, 639798, Singapore

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https://doi.org/10.1142/S0219876212400142Cited by:3 (Source: Crossref)

Abstract

Extreme elevation of temperature principally threatens tunnel linings and may cause fatal disaster; the recovery of it may take a long time and significant traffic troubles. System of equations is to be described and solution in terms of boundary element method (BEM) is suggested. Moreover, a technique of time-dependent eigenparameters enables one to apply parallel computations and converts the strongly nonlinear system to pseudo-linear one using the influence and polarization tensors. Consequently, instead of repeated solution of large systems of equations, the multiplication of pre-calculated influence matrices has to be carried out instead. In order to properly create the above-outlined procedure, internal cells are selected in the regions primarily connected by the change of temperature. Some examples follow the theory.

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