The invention discloses a long and large bridge three-dimensional multifunctional intelligent
toughness constraint
system and a multi-objective optimization design method.The constraint
system comprises a vertical three-dimensional constraint device, a transverse three-dimensional constraint device and a longitudinal three-dimensional constraint device which are arranged between a main beam and a bridge
tower (
pier), and the vertical constraint device and the transverse constraint device are both constraint devices with the self-
recovery function; the longitudinal restraining device is a static limiting-dynamic damping combined restraining device with a self-
recovery function; according to the multi-objective optimization design method, structure additional rigidity, additional damping and additional
mass are taken as decision variables, structure
toughness, service life and cost are taken as constraint objectives, a
genetic algorithm is utilized to carry out multi-objective optimization and solve a Pareto frontier, and a weighted
Euclidean distance method is adopted to determine
optimal design parameters according to preset
toughness, service life and cost weights. The method is suitable for
parameter design of the long and large bridge three-dimensional multifunctional intelligent toughness constraint
system, and comprehensive optimization of structural toughness, service life and cost is achieved.