In this paper, performance-based optimization design of steel concrete composite moment resistance frames is presented using a chaotic optimization algorithm based on Chebyshev chaotic map. The strategy is applied to two examples of an 8-story frame and a 20-story frame. The structure is designed to respond to different levels of seismic hazard levels for the minimization of total weight. To achieve this goal, three main steps are conducted. In the first step, the five best designs for each of the frames were obtained by solving the optimization problem. Nonlinear pushover analysis was conducted to arrive at each performance level. In the next step, the fragility curves are plotted for five selected designs for each frame, and finally, damage margin ratios were calculated for each damage level and the best design for each frame was selected based on the damage margin ratio values. Results illustrate a desirable performance of the algorithms in both obtaining lower weight and selecting the best design based on the seismic behavior of the structure.

本文采用基于Chebyshev混沌映射的混沌优化算法，提出了基于性能的钢混凝土组合抗弯框架优化设计方案。该策略适用于8层框架和20层框架的两个示例。该结构旨在响应不同级别的地震危险等级，以使总重量最小化。为了实现此目标，执行了三个主要步骤。第一步，通过解决优化问题，获得了每个框架的五个最佳设计。进行非线性推覆分析以达到每个性能水平。下一步，绘制每帧五个选定设计的易损性曲线，最后，计算每个损坏级别的损坏裕度比率，并根据损坏裕度比率值选择每个框架的最佳设计。结果说明了该算法在获得较低重量和基于结构的地震行为选择最佳设计方面的理想性能。