FULL AEROELASTIC MODEL TESTS

The methodology for the design, construction and instrumentation of full aeroelastic models of long span bridges is reviewed. Examples of their use are provided and include the forecast of the effect of turbulence on the torsional response of Lion's Gate Bridge, and the effect of part span fairings on the same bridge. The advantages of a full aeroelastic model over sectional or other types of partial model are:- i) turbulence effects are well simulated; ii) three-dimensional and local topographical effects can be studied; iii) wind effects during construction can be readily studied; iv) subtle interactions between the various modes of vibration and the influences of mode shape are included; and v) an often overlooked advantage is the educational value of the model to the design and construction team. Frequently the model gives important and sometimes unexpected insights into the bridge response. Disadvantages are greater cost and time to build the model and the necessity to use smaller model scales than for partial models. Aeroelastic model tests are best conducted in parallel with sectional model and analytical studies. (A) For the covering abstract of the conference see IRRD 857429.