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辽宁省科技馆属于超长、不规则、带大悬挑的超限钢-混凝土混合结构。介绍了工程的特点和结构体系的选择,针对结构超限情况提出了相关的抗震措施。针对主体混凝土结构、主体钢结构、钢结构球体、大挑檐,进行了系统的分析和设计。经过对整体结构进行弹塑性动力时程分析,考察了结构的塑性发展程度和变形能力,并对薄弱构件进行了加强。支撑体系设计时考虑采用屈曲约束支撑构件,以尽量减小外观尺寸并改善抗震性能。设计结果表明,结构抗震性能良好,结构体系安全可行。
Liaoning Science and Technology Museum belong to the ultra-long, irregular, with large cantilevered overrun steel - concrete hybrid structure. The characteristics of the project and the choice of the structural system are introduced. Relevant seismic measures are put forward in view of the structural overrun situation. Aiming at the main concrete structure, the main steel structure, the steel structure sphere and the big cornice, the system analysis and design were carried out. After elasto-plastic dynamic time-history analysis of the whole structure, the degree of plasticity development and deformation capacity of the structure are investigated, and the weak components are strengthened. The support system is designed with buckling restraint brace to minimize the size and improve the seismic performance. The design results show that the seismic performance of the structure is good and the structural system is safe and feasible.