基于减隔震技术的某既有钢筋混凝土框架医疗建筑抗震性能提升

SEISMIC BEHAVIOR IMPROVEMENT OF AN EXISTING RC FRAME MEDICAL BUILDING BASED ON SEISMIC ISOLATION AND ENERGY DISSIPATION TECHNIQUE

以北京某既有混凝土框架医疗建筑为例,开展了基于减震技术和基础隔震技术的抗震性能提升设计。分别采用Perform-3D和ETABS对减震和隔震结构的地震响应特征进行了分析,并与原结构的抗震性能进行了对比。结果表明:基于减震技术的抗震性能提升方案可较好地提升结构的抗震性能,有效控制主要构件的损伤程度,但楼面最大绝对加速度仍超出了3m/s^2,关键设备在震后可能无法正常工作;基于隔震技术的抗震性能提升方案则可显著提升结构的抗震性能,罕遇地震下上部结构基本处于弹性状态,楼面最大加速度平均值降低至1.69m/s^2,可有效避免重要设备的倾倒损坏,保证了该医疗建筑在震后的救灾功能。

The seismic behavior a RC frame medical building located in Beijing was improved by using energy dissipation technique and seismic isolation technique. Perform-3D and ETABS were adopted to analyze the seismic responses of the energy dissipation structure and the seismic isolated structure, respectively. In addition, the corresponding seismic behaviors were compared with that of the original structure. The results indicated that energy dissipation technique could improve the seismic behavior of the structure and effectively control the damage of the main components. However, the average value of the maximum absolute floor acceleration exceeded 3 m/s^2 and the key equipment might not work properly after the earthquake. In contrast, seismic isolation technique could significantly improve the seismic behavior of the structure. Under the rare earthquake, the superstructure basically remained elastic. The average value of the maximum absolute floor acceleration was reduced to 1.69 m/s^2, which could effectively prevent the important equipment feelling to the ground, so as to ensure that the medical building could operate normally after the earthquake.