砖混房屋整体式外套框架加层结构分析

Structural Analysis for Story-adding of Existing Brick Masonry Buildings by Incorporated Masonry-in-frame Systems

针对砖混房屋整体式外套框架加层中新旧结构之间作用不明确,计算模型不清晰的问题,在分析大量相关试验研究和理论分析资料的基础上,提出外套框架结构对原砌体结构抗震加固作用应按体外构造柱考虑,并分析了外套框架结构和既有砖混结构各自最不利内力阶段,以此作为控制结构设计的依据.本文提出,采用外套框架和抗震墙各自弹性抗侧刚度,计算结构总地震作用和层间剪力,并按其各自弹性抗侧刚度比分配地震剪力,作为既有砖混结构抗震加固验算的依据;按框架弹性刚度和抗震墙经刚度折减后的刚度比分配楼层地震剪力作为外套结构的抗震设计依据.

The interaction of frames with brick masonry buildings in the story-adding structures of existing brick buildings by incorporated masonry-in-frame system is ambiguous as well as the analytical model. It is proposed masonry that the seismic strengthening effect of the new frame structure on the existing brick masonry may be considered to be similar to that of constructional columns and beams, based on a number of relevant test data from abroad and home. Furthermore, the most disadvantaged internal force stage of the frame and brick masonry structure is analyzed, respectively, which is expected to be served as the basis of governing structural design.