套建结构增层法对抗震性能优化的设计探讨

DISCUSSION ON OPTIMUM DESIGN FOR ASEISMIC PERFORMANCE OF STOREY-ADDING EXPANSION ON EXISTING BUILDING

为了增强套建增层结构的刚度,解决套建增层结构的上刚下柔缺点,采用了PKPM2010结构设计软件模拟了分离式套建结构增层方案、整体式套建结构增层方案以及改进后的整体式套建结构增层方案。对比分析了三种套建结构增层方案分别在地震作用下振型自振周期、层间位移和层间角,并结合结构的整体性,结构的刚度均匀性,结构抗震性能分析结构的可靠性,从而得出改进后的整体式套建结构抗震性能比整体式套建结构和分离式套建结构更加优越。

With the purposes to increase the rigidity to solve the defect of rigid superstructure and flexible software is adopted to simulate the separate storey-adding methods for storey-adding expansion on existing building of expanded stories on existing building and lower structure, PKPM2010 structural design expansion on existing building. Three different are compared with each other to respectively analyze their natural vibration period of vibration mode, inter-storey displacement and inter-storey angle under earthquake. Structural reliability is analyzed on the aspects of structural integrity, rigidity evenness and aseismic performance. It is proved that the aseismic performance of the improved integrally expanded structure is better than original integrally expanded structure and separately expanded structure.