Investigation of flexural and shear behavior of innovative Cold-formed steel beams with web openings

NRC Grant:  16-149

Dr. K.S. Wanniarachchi
Faculty of Engineering
University of Ruhuna
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Structural Engineering



The main objectives of this research study are as follows:

1. conduct a series of full scale laboratory tests to investigate shear and flexural behavior of screwed-fastened RHFB with web openings.

2. simulation of laboratory test using ABAQUS computer software, validation of model with test results, and conduct a comprehensive parameter study.

3. Development of design rules for shear and flexure for screwed-fastened RHFB with web openings


Use of cold-formed steel has gained popularity rigorously in recent past due to many advantages possessed by cold-formed steel over its counterpart hot-rolled steel. Although world trend of cold-formed steel construction has been emerged as such a fashion, the construction industry in Sri Lanka is still depended mostly on the conventional hot-rolled steel. Past research has identified cold-formed steel sections as a very good alternative material to replace bulky hot-rolled steel and other civil engineering materials. However in structural point of view, these cod-formed steel sections are suffered from various buckling models and shear failures especially due to thin elements. Research investigations to address these failure criterions are being undertaken all over the world. A strong research group at the Queensland University of Technology (QUT) is actively involved and conducted many research on these cold-formed steel sections. However still there are many shortcomings which need attention by the researchers to make the cold-formed steel sections more structurally sound and economically feasible. One such problem identified in this research proposal is the shear behavior and flexural behavior of these cold-formed steel sections comprising web holes which provided to facilitate various building services. The proposed research is intended to undertake both experimental and analytical investigations and thereby suitable design guidelines will be proposed to practice by engineers. The main investigator of this research project has strong linked with QUT and will gain necessary research input for this research project through the research partners currently at QUT.