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A geodetic deformation survey to monitor the behavior of a concrete slab during its axial compression testing

Md. Som, Z. A. and Setan, Halim and M. Idris, K N (2004) A geodetic deformation survey to monitor the behavior of a concrete slab during its axial compression testing. In: 1 st FIG International Symposium on Engineering Surveys for Construction Works and Structural Engineering, 28 Jun - 1 Jul 2004, Nottingham, UK.

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Abstract

A deformation survey exercise has been performed to monitor the behavior of a small engineering object i.e., a 455cm x 240cm x 120cm lightweight concrete slab. The survey was carried out in conjunction with the axial compression testing conducted upon the slab to determine its axial strength. The tests were done by applying a series of load beginning with 0kN and then steadily increased to 200kN, 258, 300 and 375 kN standard respectively. A micro geodetic network consists of five reference stations has been established in the laboratory where the compression tests were conducted. A number of target points have been located on the concrete block and 2D triangulation measurements consist of direction and distance observations were read to each target. A total of five epochs of measurement data were gathered and adjusted using least squares estimation (lse) procedure. The measurement epoch was corresponding to the five different loads applied during the above test. The coordinates difference obtained from lse computation indicates that the displacement vector at some of the target points is to the magnitude of 10 to 17 mm. This exercise demonstrates the capability of geodetic monitoring survey technique in providing 2D displacement vector information for a sample of concrete slab for civil engineering application.

Item Type:Conference or Workshop Item (Paper)
Additional Information:This work is part of a research project sponsored by the Ministry of Science, Technology and Innovation, Malaysia under IRPA programme Vot 74156.
Uncontrolled Keywords:Deformation Survey, axial compression, DEFORM99
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Geoinformation Science And Engineering (Formerly known)
ID Code:1207
Deposited By: En. Tajul Ariffin Musa
Deposited On:01 Mar 2007 02:57
Last Modified:22 Dec 2011 08:12

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