Aims & Learning Objectives:
To develop the understanding and application of design procedures for various materials (particularly steel and concrete) related to professional codes of practice.
To cover the effects of vibrations and issues affecting the stability of structures.
Content:
Reinforced concrete: beams - T & L beams, doubly reinforced beams, crack widths. Slabs - two way span slabs, flat slabs, strip theory. Columns - combined compression and bending, compression and tension control, derivation of design graphs, moment increase due to slenderness.
Prestressed concrete: derivation of losses, elastic and ultimate analysis. Introduction to shear and end blocks.
Structural steel: lateral torsional buckling. Local buckling of webs, web stiffeners. Combined shear and bending. Column design. Plastic sizing of elements.
Structural timber: properties of timber, strength of joints, slenderness, notching, combined stresses, glued laminated members.
Masonry: strengths and partial safety factors, stress block, slenderness, arching. Wind loading, tensile stresses, precompression. Tables of panel moments.
Composites.
Vibrations
Single degree of freedom systems: free vibrations, response to step load, sinusoidal load and seismic and inertial excitation.
Dynamic loads: random loads. Earthquakes, rigid model and aeroelastic model wind tunnel tests.
Natural frequencies and mode shapes or buckling loads and mode shapes with a variety of end conditions. Orthogonality conditions. Damping and response to loads including moving loads.
Multi degree of freedom systems: lateral vibrations of beams under constant axial load.
Discussion of post buckled stability via single degree of freedom models. Interaction of buckling and plasticity; lateral torsional buckling of beams.
Modal analysis for vibrations and buckling of structures; eigenvalues, eigenvectors and othogonality conditions.
Damping and geometric stiffness.
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