Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Apparatus for testing concrete under multiaxial compression at elevated temperature (mac2T).

Petkovski, M. and Crouch, R. S. and Waldron, P. (2006) 'Apparatus for testing concrete under multiaxial compression at elevated temperature (mac2T).', Experimental mechanics., 46 (3). pp. 387-398.

Abstract

This paper describes a new test facility for determining material mechanical properties of structural concrete. The novel facility subjects 100 mm cubic concrete specimens to true multiaxial compression (σ1 ≠ σ2 ≠ σ3) up to 400 MPa at temperatures of up to 300°C. Forces are delivered through three independent loading frames equipped with servo-controlled hydraulic actuators creating uniform displacement boundary conditions via rigid platens. Specimen deformation is calculated from displacements measured to an accuracy of 10−6 m using a system of six laser interferometers. The combination of stiff loading frames, rigid platens, an accurate and reliable strain measurement system and a fast control system enables investigation of the material response in the post-peak range. The in-house developed control software allows complex multi-stage experiments involving (i) load and temperature cycling, (ii) small stress probes and (iii) arbitrary (pre-defined) loading paths. The program also enables experiments in which the values of the control parameters and the execution of the test sequences depend on the response of the specimen during the test. The capabilities of the facility are illustrated in this paper by experiments determining the effects of different heat-load regimes on the strength and stiffness of the material and tests identifying the tangent stiffness matrix of the material and the associated changes in the acoustic tensor under multiaxial compression.

Item Type:Article
Keywords:Test facility.
Full text:PDF - Accepted Version (2251Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1007/s11340-006-7463-8
Publisher statement:The original publication is available at http://www.springerlink.com/
Record Created:02 Jun 2008
Last Modified:24 May 2011 09:22

Social bookmarking: del.icio.usConnoteaBibSonomyCiteULikeFacebookTwitterExport: EndNote, Zotero | BibTex
Usage statisticsLook up in GoogleScholar | Find in a UK Library