框剪结构二道防线调整方法探讨

Discussion on two lines of defense adjustment methods on RC frame-wall structure system

在框剪结构的抗震设计中,需要对作为二道防线的框架部分进行内力调整。本文介绍现有的框剪结构二道防线调整方法,选取实际工程,对比了我国《建筑抗震设计规范》(GB 50011—2010)、美国规范UBC 97及中震弹塑性调整三种方法之间的差异,结合框剪结构的变形特点给出了调整建议;同时考察了我国《建筑抗震设计规范》调整方法对梁柱配筋量的影响,结果显示该调整对梁配筋影响大于对柱配筋的影响,整个结构趋于"强梁弱柱"方向发展,与强柱弱梁思想相违背。

Internal force of frame needs to be adjusted in order to realize two lines of defense in seismic design of frame-wall structure.The existing methods of two lines of defense issue adjustment on RC frame-wall structure system are introduced.The methods of Chinese Code（GB 50011—2010）,American Code（UBC97） and adjustment under moderate earthquake are compared,the differences are pointed out through a practical engineering.The adjustment proposal is put forward based on methods above and deformation of frame-wall structures.At the same time,it is analyzed that how is total reinforcement weight of beams and columns affected by China Code（GB 50011—2010）.The results show that the adjustment impact on beam reinforcement is greater than that of column reinforcement,which makes the whole structure tend to strong beam and weak column and goes against weak beam and strong column.