TY - GEN
T1 - A linkage-based movable bridge form
T2 - Structures Congress 2012
AU - Thrall, A. P.
AU - Adriaenssens, S.
AU - Zaforteza, I. Payá
AU - Zoli, T. P.
PY - 2012
Y1 - 2012
N2 - This paper explores a novel form for movable bridges which uses linkages as the main kinematic and structural elements. The proposed linkage-based movable bridge form was designed through 1) physical shape-finding, 2) generating a parametric model and kinematic equations, and 3) multi-objective structural optimization for minimum self-weight and minimum power for operation. Shape optimization is performed to determine the lengths and relative angles of members using a Multi- Objective Simulated Annealing algorithm. A nested sizing optimization procedure, using the Descent Local Search algorithm, designs the section profiles of members to meet the specifications of current American bridge design code. The ultimate result of this optimization procedure is a pareto-optimal set of solutions from which an engineer can choose based on design priorities. This case study meets the design requirements for the mobile section of the Woodrow Wilson Bridge Design Competition (November 1998) for the crossing between Alexandria, Virginia and Oxon Hill, Maryland, USA.
AB - This paper explores a novel form for movable bridges which uses linkages as the main kinematic and structural elements. The proposed linkage-based movable bridge form was designed through 1) physical shape-finding, 2) generating a parametric model and kinematic equations, and 3) multi-objective structural optimization for minimum self-weight and minimum power for operation. Shape optimization is performed to determine the lengths and relative angles of members using a Multi- Objective Simulated Annealing algorithm. A nested sizing optimization procedure, using the Descent Local Search algorithm, designs the section profiles of members to meet the specifications of current American bridge design code. The ultimate result of this optimization procedure is a pareto-optimal set of solutions from which an engineer can choose based on design priorities. This case study meets the design requirements for the mobile section of the Woodrow Wilson Bridge Design Competition (November 1998) for the crossing between Alexandria, Virginia and Oxon Hill, Maryland, USA.
UR - http://www.scopus.com/inward/record.url?scp=84866691463&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866691463&partnerID=8YFLogxK
U2 - 10.1061/9780784412367.035
DO - 10.1061/9780784412367.035
M3 - Conference contribution
AN - SCOPUS:84866691463
SN - 9780784412367
T3 - Structures Congress 2012 - Proceedings of the 2012 Structures Congress
SP - 391
EP - 400
BT - Structures Congress 2012 - Proceedings of the 2012 Structures Congress
Y2 - 29 March 2012 through 31 March 2012
ER -