Content area
Precise determination of structural elastic–plastic displacement and component states under rare earthquakes is crucial for structural design. This article proposes a quasi-elastic–plastic optimization method for reinforced concrete structures. First, an approximate formula for calculating the yield bending moment of shear walls is provided through analysis of 64 shear walls. Second, a quasi-elastic–plastic analysis method is proposed. Using the elastic response spectrum analysis, strain energy for each component is calculated, and stiffness reduction factors for walls, beams, and columns are derived based on the energy equivalence principle. Finally, combining the elastic response spectrum analysis and the quasi-elastic–plastic analysis, various constraint indicators at the elastic and elastic–plastic design stages are calculated, and structural size optimization is completed using the particle swarm optimization method. The feasibility of this method is validated with examples of a 15-story reinforced concrete frame structure and a 15-story frame–shear wall structure. The quasi-elastic–plastic optimization with the particle swarm optimization efficiently completes elastic–plastic optimization for reinforced concrete structures, determining section sizes that meet performance standards while reducing material usage.
Details
Particle swarm optimization;
Structural engineering;
Concrete;
Strain analysis;
Ratios;
Concrete structures;
Optimization;
Equivalence principle;
Spectrum analysis;
Elastic analysis;
Plastic design;
Frame structures;
Structural design;
Reinforced concrete;
Plastics;
Bending moments;
Methods;
Algorithms;
Deformation;
Shear walls;
Mechanical properties;
Strain energy
1 Zhejiang Construction Investment Group Co., Ltd., Hangzhou 310012, China;
2 Center for Balance Architecture, Zhejiang University, Hangzhou 310058, China;
3 Center for Balance Architecture, Zhejiang University, Hangzhou 310058, China;
4 Zhejiang Construction Investment Group Co., Ltd., Hangzhou 310012, China;