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进行了1个钢管混凝土组合筒体结构模型的拟动力试验。模型为比例1∶10的13层钢管混凝土组合筒体结构,外筒为钢管混凝土框支框筒结构,内筒为钢筋混凝土核心筒结构。将模型等效为两自由度体系,分别进行了地震波加速度为0.22g、0.40g、0.62g和1.0g共4种工况的拟动力试验,通过对位移时程、作用力时程、应变状态、开裂状况等参数的测试,研究了结构在地震作用下的耗能机制、破坏特征与破坏机理,以及结构的弹塑性性能。研究表明,核心筒是抵抗水平剪力的重要构件,承担了结构大部分剪力,先于其它构件开裂,但核心筒底层的破坏程度比2层要轻;连梁是核心筒受力最集中、破坏最明显的部位,应重视连梁的延性设计;钢管混凝土角柱的强度高、变形性能好,分担了外框筒的主要轴向力,对其它翼缘混凝土柱起到了卸载保护作用,另外,钢管混凝土柱与梁的环形节点构造在复杂的节点内力联合作用下受力是可靠的。试验证明了钢管混凝土组合筒体结构是一种具有良好抗震性能的结构体系。
Pseudo-dynamic test of a CFST cylinder structure model was carried out. The model is a 13-story CFST composite cylinder structure with a ratio of 1:10. The outer cylinder is a CFST frame structure and the inner cylinder is a reinforced concrete core tube structure. The model is equivalent to a two-degree-of-freedom system. The quasi-dynamic tests are carried out for four conditions with seismic wave accelerations of 0.22g, 0.40g, 0.62g and 1.0g. The displacement time history, , Cracking conditions and other parameters of the test, the structure of the earthquake under the action of the energy mechanism, damage characteristics and failure mechanism, as well as the structure of the elastoplastic performance. The research shows that the core tube is an important component to resist the horizontal shear force and takes up most of the shear force of the structure, cracking before other components, but the damage of the bottom layer of the core tube is lighter than that of the second layer. , The most obvious damage parts should pay attention to the ductility design of the connecting beam. The concrete filled steel tubular corner columns have the advantages of high strength and good deformability, sharing the main axial force of the outer frame and unloading protection for other flanged concrete columns. In addition, , The ring node structure of CFST column and beam is reliable under the joint action of internal forces of complex nodes. The test proves that the CFST cylinder structure is a kind of structural system with good seismic performance.