深圳某大高宽比超高层住宅结构设计

Structural design of a super high-rise residential building with large aspect ratio in Shenzhen

深圳某项目1栋采用钢筋混凝土剪力墙结构体系,高度为188.5m,高宽比为10.16。本项目高度超B级、高宽比大、周边风环境复杂,且面临一向少墙、穿层墙稳定性等问题。为此,本文进行了优化结构布置、抗震性能分析、风洞试验、一向少墙分析、穿层墙稳定性等分析。分析表明,本结构穿层墙不会发生局部屈曲破坏;扁柱-楼板框架剪力比小于10%,本结构不属于一向少墙结构。通过风洞试验确定风荷载参数,并验证了结构加速度响应满足规范舒适度要求。通过抗震性能分析揭示了结构薄弱部位,并采取了增加楼板厚度和提高楼板、连梁、框架柱、剪力墙配筋率等措施。弹塑性时程分析结构表明,本结构各项指标均满足抗震性能目标要求。

A project in Shenzhen, which adopts reinforced concrete shear wall structure, has a height of 188.5 meters and an aspect ratio of 10.16. The project has a height exceeding Class B, a large aspect ratio, a complex wind environment,and the problem, such as few shear walls in one direction and the stability of cross-story walls may occur. The optimization of structural layout, seismic performance analysis, wind tunnel test, analysis of few shear walls in one direction and stability analysis of cross-story walls were carried out in this paper. The result shows that local buckling failure will not occur in the cross-story walls in this project. The shear force ratio of flat column-floor slab frame is less than 10%, indicating that the structure does not need to be designed according to the structure with few walls in one direction. The wind tunnel test was carried out to determine the wind load parameters, and the result verifies that the acceleration response of the structure meets the comfort requirements of the code. The seismic performance analysis was carried out to reveal the weak part of the structure, and the strengthening measures such as increasing the thickness of the floor and increasing the reinforcement ratio of the floor, coupling beam, frame column and shear wall are taken. The result of elastic-plastic time history analysis shows that all indexes of the structure meet the requirements of seismic performance objectives.