of
a prefabricated structure, such as industrial construction, reusable formwork,
reduced labor times and low interference with traffic. The methodology
followed in this study consisted in developing a computer
evaluation module from the cross-section dimensions, materials and
steel reinforcement. This module computed the CO2 emissions of a
solution and checked all the relevant limit states. The proposed optimal
design method employs a hybrid glowworm swarm optimization algorithm
as an optimization tool. This algorithm combines the GSO algorithm
with the SA local search. The objective function of CO2 emission
is evaluated along with the economic cost during the bridge materials
production and manufacture, transport and construction.