提高小跨高比连梁抗震性能的设计方法

Design Methods to Improve Seismic Performance of Coupling Beams with A Small Span-to-depth Ratio

对剪力墙结构中小跨高比连梁的抗震设计方法进行了分析。从小跨高比连梁的抗震性能和施工难度出发,本文优先推荐加大洞口以增大连梁跨高比的方法。如果必须采用小跨高比连梁,则首先选择双连梁、多连梁方案,其次可选择集中对角斜筋连梁。最后,根据混凝土结构的基本抗剪机理,本文提出了一种强化配筋连梁,可供工程设计参考。

Seismic design methods of coupling beams with a small spantodepth ratio in shear wall structures are analyzed.Based on seismic performance and construction difficulty of coupling beams with a small spantodepth ratio,this study recommends a method in priority that the size of opening is enlarged so as to increase the spantodepth ratio of the coupling beams.If coupling beams with a small spantodepth ratio has to be employed,〖JP2〗dual or multi coupling beams are primarily recommended and secondly concentrated diagonally reinforced coupling beams.Finally,according to basic shear mechanism of concrete structures,this study proposes a type of coupling beam with strengthened reinforcement,which provides a reference for similar projects.