超高层结构筒体剪力墙优化设计

Optimization Design of Tube Shear Walls in Super High-rise Structures

以广东省广州市某超高层商用办公楼为例,基于弹塑性时程分析理论,对3种不同剪力墙布置的结构方案分析其结构层间位移角和剪力变化规律。结果表明,方案C和方案B的层间位移角曲线均呈典型的“单峰”曲线变化,且顶部层间位移角大于底部,但方案C的层间位移角峰值出现在顶部,方案B的层间位移角峰值出现在底部;方案B的层间位移角峰值最小,方案A次之,方案C最大;方案A的抗震不利区域出现在中部以上楼层,方案B在结构顶部以下1/3位置,方案C在结构底部以上1/3位置;综合分析结构损坏程度,建议推荐方案B,该方案不仅具有较大的抗侧向刚度,结构的层间位移角较小,且结构的损坏程度较为均匀,结构的严重损坏占比较小。

Taking a super high-rise commercial office building in Guangzhou,Guangdong Province as an example,based on the theory of elastic-plastic time history analysis,the inter story displacement angle and shear force variation law of three different shear wall arrangements were analyzed.The results show that the inter story displacement angle curves of Scheme C and Scheme B both exhibit typical "unimodal" curve changes,and the inter story displacement angle at the top is greater than that at the bottom.However,the peak inter story displacement angle of Scheme C appears at the top,while the peak inter story displacement angle of Scheme B appears at the bottom;The peak inter story displacement angle of scheme B is the smallest,followed by scheme A,and scheme C is the largest;The seismic unfavorable area of Plan A occurs on floors above the middle,Plan B is located 1/3 below the top of the structure,and Plan C is located 1/3above the bottom of the structure;Based on a comprehensive analysis of the degree of structural damage,it is recommended to recommend option B.This option not only has a high lateral stiffness,but also has a small inter story displacement angle.The degree of structural damage is relatively uniform,and the proportion of severe structural damage is relatively small.