[优化][编程] 基于ETABS二次开发的塔楼斜柱斜率变化优化案例 (Slope Sensitivity analysis of the inclined columns of the tower through secondary development of ETABS)

实干、实践、积累、思考、创新。


实际超高层工程案例中,塔楼外框常采用斜巨柱形式,以加强外框刚度和满足建筑外形要求,例如中国尊大楼、武汉绿地中心等。为了探究巨柱斜率对整体刚度影响,基于ETABS二次开发技术实现不同斜率巨柱自动化计算以及提取相应结果,以供参考:

一、计算模型

斜柱斜率变化视频

二、计算结果

三、初步结论

1、巨柱斜率增大,结构刚度增加,地震下结构基底剪力增大;

2、巨柱斜率增大,风荷载下结构最大层间位移角可减小15%,当斜率大于一定角度后,最大层间位移角减小幅度有限;

3、相比结构前二周期,结构第三周期(扭转周期)对巨柱斜率变化更为敏感,即增大巨柱斜率更有利于提高结构扭转刚度。

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