All students undertaking Level One undergraduate programmes in construction need to develop an understanding of basic building techniques. This up-to-date and dependable textbook takes the reader through the essential skills, concepts and methods of constructing a simple house to provide a solid grounding in building techniques. Working through each element of a building project and incorporating practical considerations from materials selection to implementation, this is the ideal handbook for all students who need a hands-on and thorough guide. Self-assessment exercises at key points underline the main concepts and make this text ideal for distance or independent learners as well as university students.
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Experimental and numerical studies were carried out to investigate the punching shear
strength of post-tensioned concrete flat slab-interior column connections under the effects
of gravity loads and lateral displacements induced by earthquakes. Seven full-size posttensioned
slab-interior column connections were tested under gravity loads combined
with cyclic displacement reversals of increasing amplitude up to failure. The ratio of
prestressed to non-prestressed reinforcement was varied, while the flexural strength was
constant. The slabs were reinforced with headed studs, a type of shear reinforcement that
had been developed at the University of Calgary. The objective of this experimental
program was to verify the applicability of the seismic provisions of the North American
codes as well as other seismic design procedures, proposed earlier, when used for
prestressed slabs.
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Two issues have been investigated regarding the prestressed concrete through-girder
pedestrian bridge system. The first issue was related with the ductility of prestressed
concrete girders used in these types of bridges. The girders are reinforced with large
amounts of prestressing strands in order to satisfy the deflection requirements with the
relatively large span lengths (125-135 ft.). Moreover, the girders do not have a composite
deck on top that would help to resist the relatively large internal tensile force caused by
the prestressing strands. As a result, the section used in these bridges (Mn/DOT Type 63
section) is considered as over-reinforced according to the AASHTO LRFD Bridge
Specifications and fails to meet the required flexural strength.
A nonlinear strain compatibility analysis of the Mn/DOT Type 63 section was performed
in order to identify the design procedures that accurately predict the section behavior.
Response of the section, including the neutral axis location, strand stress at ultimate
capacity, and the moment capacity of the section, predicted by the AASHTO Standard
and AASHTO LRFD Specifications was compared with the sectional response
determined from the strain compatibility analyses. Based on the analysis results,
modifications were proposed to the procedure used by the LRFD Specifications in order
to rectify the errors in predicting the sectional response.
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