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抗震性能的劣势会影响钢筋混凝土异形柱框架结构在工程中的推广和应用,特别是在抗震设防烈度为8度(0.2g)的地区,其高度不超过12 m的规定,严重限制了混凝土异形柱框架在高烈度地区的应用。针对钢筋混凝土异形柱框架结构的抗震性能不足,其应用受限的问题,引入成熟的隔震技术,设计一幢8层(含隔震层)基础隔震钢筋混凝土异形柱框架结构,按1/5的缩尺比例制作试验模型,并进行振动台试验,以研究隔震技术用于钢筋混凝土异形柱框架结构的适应性。通过试验,考察了基础隔震钢筋混凝土异形柱框架结构在各荷载工况下的工作状态和性能。试验结果表明:将隔震技术应用于钢筋混凝土异形柱框架结构,在抗震设防烈度为8度(0.2g)的地区可实现降低一度设防的隔震效果,普通隔震框架结构的设计方法及隔震措施适用于钢筋混凝土异形柱框架结构,采用隔震技术可以扩大钢筋混凝土异形柱框架结构的适用范围。钢筋混凝土异形柱框架结构弹塑性阶段的刚度迅速衰减会对隔震效果产生明显的影响。
Disadvantages of seismic performance will affect the popularization and application of RC frame with special-shaped columns in engineering. Especially in the area where the seismic fortification intensity is 8 degrees (0.2g), the height is not more than 12m, which seriously limits the concrete profile Column frame in high intensity applications. Aiming at the problem of insufficient seismic performance and limited application of reinforced concrete special-shaped column frame structure, a mature isolation technology is introduced to design an 8-story reinforced concrete special-shaped column frame with isolation layer. According to 1 / 5 scale model to make a test model, and shaker test to study the application of seismic isolation technology for reinforced concrete special-shaped column frame structure adaptability. Through the test, the working status and performance of base-isolated RC frame with special-shaped columns under various load conditions were investigated. The test results show that the seismic isolation technology can be applied to reinforced concrete special-shaped column frame structure, and the isolation effect of once fortification can be reduced in the region with seismic fortification intensity of 8 degrees (0.2g). The design method and interval Seismic measures apply to reinforced concrete special-shaped column frame structure, the use of isolation technology can expand the scope of application of special-shaped reinforced concrete frame structure. The rapid attenuation of stiffness in the elastoplastic phase of reinforced concrete frame with special-shaped columns will have a significant impact on the isolation effect.