This Ph.D. thesis represents a summative report detailing research processes and outcomes from investigating the ultimate and serviceability limit state short- and long-term behaviour and design of timber-concrete composite floors. The project enables the realization of a semi-prefabricated LVL-concrete composite floor system of up to 15 m long using 3 types of connection. Design span tables which satisfy the ultimate and serviceability limit state short- and long-term verifications for this system form the novel contribution of this thesis.
In quantifying the behaviour of timber-concrete composite floors, 5 different experimental phases have been carried. 9 major achievements in meeting 9 sub-objectives have been concluded:
1) Three best types of connection system for timber-concrete composite floors have been identified;
2) The characteristic strength and secant slip moduli for these connections have been determined;
3) The short-term behaviour of the selected connections defined by their pre- and post-peak responses under collapse load has been established;
4) An analytical model for the strength evaluation of the selected connections based on the different possible modes of failure has been derived;
5) Easy and fast erected semi-prefabricated timber-concrete composite floor has been proposed;
6) The short-term ultimate and serviceability limit state behaviour of timber-concrete composite floor beams under collapse load has been investigated;
7) The long-term behaviour of chosen connections defined by their creep coefficient has been determined;
8) The long-term behaviour of timber-concrete composite floor beams under sustained load at serviceability limit state condition has been investigated; and
9) Design example and span tables for semi-prefabricated timber-concrete composite floors that satisfy both the ultimate and serviceability limit state in the short- and long-term using the gamma-method have been developed.
| Identifer | oai:union.ndltd.org:canterbury.ac.nz/oai:ir.canterbury.ac.nz:10092/4428 |
| Date | January 2010 |
| Creators | Yeoh, David Eng Chuan |
| Publisher | University of Canterbury. Department of Civil and Natural Resources |
| Source Sets | University of Canterbury |
| Language | English |
| Detected Language | English |
| Type | Electronic thesis or dissertation, Text |
| Rights | Copyright David Eng Chuan Yeoh, http://library.canterbury.ac.nz/thesis/etheses_copyright.shtml |
| Relation | NZCU |
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