| Title | Composite Structures In The Circular Economy |
|---|---|
| ID_Doc | 4351 |
| Authors | Lam, D; Dai, XH; Ashour, AF; Rehman, N |
| Title | Composite Structures In The Circular Economy |
| Year | 2016 |
| Published | |
| Abstract | In recent years, emphases have been given to sustainable issues, trying to reduce waste and carbon emission in construction. This paper presents experimental and numerical investigations on an innovative composite floor system with deconstructability. In this system, a composite slab formed with metal profiled decking is connected to a steel beam using demountable shear connectors. A series of push tests were conducted to investigate the behaviour of this form of shear connectors. In addition to the push tests, a full-scale composite beam was tested to failure in the laboratory under a number of cycles of monotonic loading. For direct comparison, a similar composite beam test was conducted using same section size, concrete strength, but with the conventional welded headed stud connectors. The test results showed that the behaviour of the composite beam with demountable shear connectors is comparable with the specimen with welded shear connectors. After the test was terminated, the demountable shear connectors were unfastened and the composite floor can be easily lifted off from the steel beam. Test result showed that these demountable shear connectors possess high ductility in comparison with the equivalent welded shear connectors. Simple design rules currently use in Eurocode 4 for the welded shear connections and Eurocode 3 for bolts are proposed to predict the shear capacity of this form of demountable shear connectors. |
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