Deep basements present structural challenges that extend well beyond the design of basement walls and slabs.
Category: Analysis
Bracing layout has a major influence on the stability and behaviour of steel buildings. The position of the braced bays affects lateral stiffness, torsional response, diaphragm forces, load paths and foundation reactions
Foundation design for tall buildings requires more than checking whether the soil can carry the building weight. The engineer must consider soil conditions, vertical loads, settlement, differential settlement, wind forces, overturning, lateral resistance and construction effects.
Understanding load paths becomes particularly important when designing irregular reinforced concrete buildings. Changes in column positions, transfer floors, setbacks, large openings, irregular cores and uneven stiffness can all change the way forces move through a structure.
Removing a column changes the load path through an entire part of a building. The loads previously carried by the removed column must be transferred through surrounding beams, slabs, columns, walls, and connections.
Building shape has a direct influence on structural performance because geometry controls how structural elements are arranged and how forces move through the building.
A piled raft foundation becomes particularly valuable when a conventional raft can no longer provide the required settlement performance efficiently, but a conventional piled foundation would involve more piles than necessary.
Excessive deflection requires more than a simple comparison between measured movement and a code limit.
Nonlinear analysis becomes valuable when structural behaviour departs significantly from the assumptions of linear elastic analysis.
Cellular beams provide an efficient solution for long-span structures by combining increased structural depth with reduced steel weight and regular openings for building services.