合肥某超限框架-核心筒结构外框柱设计

Outside frame column design of an out-of-code frame-core wall structure in Hefei

运用PKPM软件对某超限钢筋混凝土框架-核心筒结构进行建模和结构分析,在对结构进行整体分析及构件的抗震性能化设计基础上,对小震下外框柱的剪力分担问题进行研究,对大震下外框柱的抗剪性能进行验算,并对带穿层柱的一榀框架进行推覆分析,探讨外框柱中的短柱、超短柱及长柱的抗震性能,并提出加强措施。分析结果表明:在大震作用下,外框柱能发挥第2道抗震防线的作用,具有良好的受力性能和变形能力,能够达到预期的性能目标。

PKPM software was used for modeling and structure analysis of an out-of-code reinforced concrete frame-core wall structure.Based on the overall analysis on the structure and seismic performance design on components,shear force sharing issue of outside frame columns under frequent earthquakes was studied,and shear performance of outside frame columns under the rare earthquake was calculated.Pushover analysis was conducted on a frame with cross-layer columns to investigate the seismic performance of short columns,super-short columns and long columns in the outside frames,and strengthening measures were proposed.The analysis results show that the outside frame can play the role of second seismic fortification line and have good mechanical performance and deformation capacity,and it can achieve the desired performance goals.