多层钢筋混凝土框架柱震害调查分析与启示

Seismic damages of frame columns in multi-storey reinforced concrete buildings:investigation and learning

针对汶川地震中多层钢筋混凝土框架结构的框架柱震害进行分析,就我国现行规范为实现预期抗震设防目标,对框架柱梁抗弯能力比值以及柱轴压比、箍筋配箍率、纵向钢筋总配筋率等抗震构造措施展开讨论,并与美国IBC2006规范、AC I318-08规范以及欧盟EC8规范的相关规定进行比较,提出关于保证结构实现抗震设防目标的框架柱、梁抗弯能力比值以及最小配箍率、轴压比、纵向钢筋最小总配筋率等抗震措施的建议。

Seismic damages of frame columns in multi-story reinforced concrete buildings caused by the Wenchuan earthquake are analyzed.With regard to the expected seismic design objective specified in the current design code,the discussion mainly focuses on the flexural strength ratio of column to beam,the axial compression ratio of column,and the reinforcement ratios of the stirrups and longitudinal steel bars.These factors are compared with the corresponding clauses in IBC2006,ACI318-08 and EC8.Design suggestions on earthquake resistant measures,which include the adequate flexural strength ratio of column to beam,the minimum stirrup reinforcement ratio,the overall longitudinal reinforcement ratio and the axial compression ratio,are put forward to achieve the expected seismic design objective.