高层非对称连体结构屈曲约束构件耗能减震分析

Energy-dissipated analysis of buckling restrained members for high-rise asymmetric connected structures

对于高层非对称连体结构,考虑到强连体、弱连体的利弊及在端支座设置阻尼器减震结构的弊端,提出一种带耗能机制的新型连体结构。该新型连体结构在连体中部采用水平及斜向耗能构件代替弦杆及腹杆;针对此连体结构,给出了地震作用下各构件的抗震性能目标;对算例进行了多遇地震弹性及罕遇地震弹塑性计算,结果表明,此新型连体结构的设计可减弱主体结构在罕遇地震作用下的破坏,整体结构能达到预期的抗震性能设计目标。同时也指出此新型连体结构设计时需要注意的部分问题。

Considering both advantages and disadvantages of the strong-connected structure and the weak-connected structure as well as the disadvantages of energy-dissipated structures with damper at the end support, a new connected structure with energy-dissipated mechanism was proposed for high-rise asymmetric connected structures. In the new connected structure, horizontal and diagonal energy-dissipated members were set in the middle of the connected body to replace the chords and braces. Performance seismic design objectives were given for all the members under the earthquake. Elastic calculation under the frequent earthquake and elastic-plastic calculation under the rare earthquake were carried out on an example respectively. The results show that design of the new connected structure can reduce the damage of the main structure under the rare earthquake, and the entire structure can reach the expected performance seismic design objectives. Meanwhile, some problems that need pay attention to were pointed out to the design of the new connected structure.