复杂博物馆隔震结构地震模拟振动台试验研究

云南省博物馆结构处于地震高烈度地区，其结构形式为复杂超限非规则的型钢混凝土结构，对于这种具有特殊功能的建筑结构采用隔震技术具有十分重要的意义。为了确认该博物馆隔震结构的隔震效果及损伤破坏机理，对1:30的缩尺模型开展了振动台模型试验研究。主要对隔震与非隔震模型结构的动力特性及其在多遇地震、罕遇地震下的地震反应进行测试与比较。试验结果表明:隔震结构在不同性能水准地震作用下动力特性稳定，减震效果较好，上部结构水平向各层峰值加速度小于台面峰值加速度；隔震结构的加速度反应要小于非隔震结构，结构各层变形满足规定要求限值；结构扭转反应较小，整体没有发生破坏；罕遇地震作用下隔震支座滞回曲线均匀饱满，支座没有发生损伤。隔震技术能很好的在大型复杂博物馆结构中应用。

Shaking Table Tests of Complex Museum Isolated Structure

Yunnan museum is in the high-intensity seismic area, and its structure form is complex, overrun and irregular steel reinforced concrete structure. It is significant for this kind of structure with special function to use seismic isolation technology. In order to confirm the vibration isolation effect and damage mechanism of museum isolation structure, shaking table tests of a scaled model (1:30) are accomplished. The dynamic characteristics of isolated bearing and fixed bearing model structure and seismic responses of model structure under fortification intensity and rare earthquake are tested and compared. Test results show that dynamic characteristics of isolation structure under different performance level earthquakes are stable, and vibration absorption effect is good. Horizontal peak accelerations of every storey of superstructure are less than that of table. Compared with non-isolated structure, acceleration responses of isolated structure are less. The drifts of every storey of superstructure meet requirements limit. Torsion responses of structure are small. The structure has no failure. Isolation bearings hysteretic curves are full and symmetric, and have no damage. Isolation technology can be applied into large, complex museum structure.