During both the conceptual and schematic design phases for the San Francisco 49ers' stadium, the structural engineer developed a matrix of 66 structural-system scenarios. Then, the design and construction team evaluated each for schedule and cost. The team ultimately selected a steel frame, with composite metal decking and structural precast seating treads and risers. Buckling-restrained braces (BRBs) resist earthquake loads. "A BRB works like an ordinary steel brace but performs better under seismic loads due to the fabrication of a brace with 'controlled' tension and compression capacity," says Brian A. Dickson, a principal with the stadium's structural engineer, Magnusson Klemencic Associates, Seattle.
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机译：在旧金山49ers体育场的概念设计和示意图设计阶段，结构工程师开发了66个结构系统方案的矩阵。然后，设计和施工团队评估每个项目的进度和成本。该团队最终选择了一种钢框架，并采用了复合金属地板以及结构化的预制座椅踏板和立管。屈曲约束支撑（BRB）抵抗地震载荷。体育场结构工程师Magnusson Klemencic Associates负责人Brian A. Dickson说：“ BRB的工作原理类似于普通的钢制支撑，但由于制造了具有'可控制'的拉伸和压缩能力的支撑，因此在地震作用下表现更好。”西雅图。
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