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。%Yunnan provincial museum is located in a high-intensity seismic area,and its structure form is a complex,overrun and irregular steel reinforced concrete structure.It is significant for this kind of structure with a special function to use seismic isolation technology.In order to confirm the vibration isolation effect and the damage mechanism of the museum isolation structure,shaking table tests of a scaled model (1:30 ) were accomplished.The dynamic characteristics of the isolated model structure and the non-isolated one as well as their seismic responses under fortification intensity and rare earthquakes were tested and compared.Test results showed that the dynamic characteristics of the isolated structure under different performance level earthquakes are stable,and vibration reduction effect is good;the horizontal peak accelerations of storeies of the superstructure are less than that of the table;compared with the non-isolated structure,the acceleration responses of the isolated one are less;the drift of every storey of the superstructure meets the requirement's limit;torsional responses of the structure are smaller;the whole structure has no failure;the isolated bearing's hysteretic curve is full and symmetric,and the bearing has no damage.It was shown that the isolation technology can be applied in a large,complex museum structure.
展开▼
