Dynamic response characteristics of super high-rise buildings subjected to long-period ground motions

Spectrum characteristics of different types of seismic waves and dynamic response characteristics of super high-rise building structures under long-period ground motions were comparatively analyzed. First, the ground response wave （named LS-R wave） of a soft soil site with deep deposit, taking long-period bedrock seismic record as input, was calculated by wave propagation method. After that, a TOMAKOMAI station long-period seismic record from the Tokachi-Oki earthquake and conventional E1-Centro wave were also chosen. Spectrum characteristics of these waves were analyzed and compared. Then, a series of shaking table tests were performed on a 1：50 scale super high-rise structural model under these seismic waves. Furthermore, numerical simulation of the prototype structure under these excitations was conducted, and structure damages under different intensive ground motions were discussed. The results show that： 1） Spectrum characteristics of ground response wave are significantly influenced by soft soil site with deep deposit, and the predominant period has an increasing trend. 2） The maximum acceleration amplification factor of the structure under the TOM wave is two times that under the E1-Centro wave; while the maximum displacement response of the structure under the TOM wave is 4.4 times that under the E1-Centro wave. Long-period ground motions show greater influences on displacement responses than acceleration responses for super high-rise building structures. 3） Most inelastic damage occurs at the upper 1/3 part of the super high-rise building when subjected to long-period ground motions.

Effects of high modes on the wind-induced response of super high-rise buildings

For super high-rise buildings, the vibration period of the basic mode is several seconds, and it is very close to the period of the fluctuating wind. The damping of super high-rise buildings is low, so super high-rise buildings are very sensitive to fluctuating wind. The wind load is one of the key loads in the design of super high-rise buildings. It is known that only the basic mode is needed in the wind-response analysis of tall buildings. However, for super high-rise buildings, especially for the acceleration response, because of the frequency amplification of the high modes, the high modes and the mode coupling may need to be considered. Three typical super high-rise projects with the SMPSS in wind tunnel tests and the random vibration theory method were used to analyze the effect of high modes on the wind-induced response. The conclusions can be drawn as follows. First, for the displacement response, the basic mode is dominant, and the high modes can be neglected. Second, for the acceleration response, the high modes and the mode coupling should be considered. Lastly, the strain energy of modes can only give the vibration energy distribution of the high-rise building, and it cannot describe the local wind-induced vibration of high-rise buildings, especially for the top acceleration response.

Discussion on the Construction of Anti-smoke Construction Technology in Super High-rise Buildings

In recent years with the increasing number of super high-rise buildings and the ever-expanding scale the anti-smoke construction technology has attracted more and more attention.Based on this situation,this paper analyzes the smoke control technology of super high-rise buildings.The paper analyzes the importance of the application of anti-smoke construction technology in super high-rise buildings,analyzes the problems in the construction of smoke control and super high-rise buildings.The anti-smoke construction technology was studied and I hope that it can benefit the application of anti-smoke construction technology in high-rise buildings.

An improved ground motion intensity measure for super high-rise buildings

Ground motion intensity measure (IM) is an important part in performance-based seismic design. A reasonable and efficient IM can make the prediction of the structural seismic responses more accurate. Therefore, a more reasonable IM for super high-rise buildings is proposed in this paper. This IM takes into account the significant characteristic that higher-order vibration modes play important roles in the seismic response of super high-rise buildings, as well as the advantages of some existing IMs. The key parameter of the proposed IM is calibrated using a series of time-history analyses. The collapse simulations of two super high-rise buildings are used to discuss the suitability of the proposed IM and some other existing IMs. The results indicate that the proposed IM yields a smaller coefficient of variation for the critical collapse status than other existing IMs and performs well in reflecting the contribution of higher-order vibration modes to the structural response. Hence, the proposed IM is more applicable to seismic design for super high-rise buildings than other IMs.

中心城市经济型超高层小户型公寓设计研究

当代都市青年买房的经济压力和对生活品质的不妥协使得小户型公寓建筑在国内兴起,而国内中心城市中心城区的土地价值以及周边大量的客户群体让公寓建筑朝高空发展成为必然。文章以中心城市经济型超高层小户型公寓(含销售型配套底商)为研究对象,从设计前期、标准层平面、核心筒布局、小户型平面设计、建筑立面设计、配套商业设计、公寓大堂设计等方面逐步展开,对其设计思路及要点进行论述,以期为提高超高层小户型公寓设计项目的经济效益提供理论和设计方法的支持。

Collapse simulation of a super high-rise building subjected to extremely strong earthquakes

In recent years, super high-rise buildings (>500 m) are developing very quickly and become an important frontier of civil engineering. The collapse resistance of super high-rise buildings subjected to extremely strong earthquake is a critical problem that must be intensively studied. This paper builds up a nonlinear finite element model of the tallest building in China, Shang- hai Tower (632 m), and proposes the modeling method and failure criteria for different structural elements. The dynamic char- acters of this building are then analyzed, and the possible failure modes and collapse processes due to earthquakes are pre- dicted, as well as the corresponding collapse mechanism. This work will be helpful in collapse prevention and the seismic design of super high-rise buildings.

华润太原万象城结构设计

华润太原万象城属于大型城市商业综合体建筑,采用了钢筋混凝土框架-剪力墙结构体系,基础采用桩基础加防水板,楼盖为现浇钢筋混凝土梁板结构,屋面多个功能区采用了大跨异型钢结构采光顶。经分析判断,该结构为存在扭转不规则、大跨度梁、长悬挑梁、转换梁、楼板弱连接、穿层柱、结构平面超长等不规则类型的超限高层建筑。从结构体系与布置、超限情况分析、主要设计措施、结构抗震计算等方面进行介绍,全面讨论了该项目结构设计过程和方法,结果表明本项目结构设计的相关措施和计算具有有效性和合理性。

商业综合体武汉梦时代广场结构设计

武汉梦时代广场地上结构通过设置三道防震缝分为A区、B区、C1~C2区、C3区四个部分,其中A区、B区和C1~C2区均属于特别不规则的超限高层建筑。对超限结构进行了小震、中震和大震作用下的计算分析,结果表明整体结构均能满足预设的抗震性能目标。阐述了结构设计中遇到的超长混凝土结构、罕遇地震作用下剪力墙损伤严重、建筑高度判定、跃层柱稳定分析等难点。通过分析各区混凝土屋面以上结构的质量对下部结构地震剪力的影响,对各区的结构高度进行了合理判定。通过楼板温度应力分析及跃层柱的屈曲稳定分析,得出如下结论:楼板设计时应根据温度应力分析结果进行针对性加强,跃层柱稳定承载力满足要求。

超高层综合体项目设计探析——以青岛绿地中心为例

本文以青岛绿地中心为例,探讨现代超高层复杂功能商业综合体的设计难点及滨海城市地标建筑群的风貌呈现,旨在为现代商业综合体的建筑设计提供经验借鉴及参考。

超高层商业建筑消防安全多因素综合评估

分析影响超高层建筑消防安全水平的核心因素,提出超高层商业建筑消防安全评估的指标体系。结合某大型超高层商业建筑工程实际,采用消防安全系统分析方法全面排查建筑内各种火灾隐患和消防安全问题,获得评估超高层建筑消防安全水平核心要素的指标情况。基于多因素综合评估方法评估获得超高层建筑的消防安全水平,并提出加强和提升建成超高层建筑消防安全的对策。

一个超高层商务办公建筑方案的设计

笔者于2002年9—10月参与了由浙江华丰房地产开发有限公司承担开发建设的温州市车站大道站前1-2#地块工程的建筑投标竞赛。现仅就自己在此设计中的思考过程与诸位同行共同探讨几个建筑设计中经常遇到的问题:建筑与场地的控制与制约关系,复杂的内部功能与外部形象的制约与反映,以及制约超高层商务办公建筑的形体因素, 这些问题将在论述中进一步详细展开和强调。

论性能化防火设计中安全疏散设计的检验

以超高层商住楼为例 ,对“性能化”防火设计中安全疏散设计的检验原理、方法进行了较为深入的探讨 ,目的在于为我国的“性能化”

北京世贸商城水灭火系统设计问题探讨

结合北京市贸商城灭火系统的设计,对超大型商业建筑的室外消防给水系统的设计及将特级防火卷帘用于防火分区分隔时产生的问题,提出了一些看法和解决方案,从而为相关设计提供了借鉴。

超高层商用建筑暖通空调设计要点

介绍了超高层商用建筑暖通空调设计的准备工作,从冷热源设备、空调水系统、空调风系统、防排烟系统等方面,阐述了该空调系统的设计内容与要点,并提出了暖通空调的可持续设计理念,使空调系统设计达到高效、节能的运行效果。

某大型商业综合体防排烟系统设计探讨

结合淮安市某大型商业综合体的消防特点,阐述了超高层建筑防排烟系统设计的难点。结合淮安地区风力情况及主体塔楼风压分布,提出排烟风机增加50Pa的压力以克服室外风的影响。分析公寓中庭排烟情况,提出竖向采用一个机械排烟系统的设计并计算排烟量。

中低压柴油发电机在大型公共建筑中的选择

从供电系统主接线、起动时间、电压降、初投资费用、市政电压等方面分析,对中低压柴油发电机在大型公共建筑中的选用进行了综合比较。提出在实际工程设计中技术可行的前提下,优先考虑选用低压柴油发电机,同时通过综合分析比较,确定满足项目要求的柴油机组。

超高层商业建筑与超高层住宅建造的比较分析和降维应用

超高层商业建筑建造管理和技术得到了突破性进步,不断实现着超高层商业建筑的快速和高质量建造;而超高层住宅建筑的建造技术则进步相对缓慢。借鉴超高层商业建筑的建造技术和管理经验,将其建造技术降维应用,对超高层住宅建筑的建造必将起到积极和良好的作用。基于此,通过对比两者之间的异同,提出了超高层住宅建筑借鉴超高层商业建筑建造管理和技术的主要方面并应用于实践,取得了良好的效果。

超高层商业综合体建筑电气设计要点浅析

以超高层商业综合体建筑的电气设计为研究对象,在总结若干项目电气设计经验的基础上,阐述了超高层综合体建筑强电系统中供电系统、配电系统、照明系统和智能照明控制系统的设计要点。

超高层商用建筑暖通空调设计管理探析

对超高层建筑暖通空调设计原则进行分析,并对主要的设计内容与方法加以阐述,包括冷热源设备、空调水系统、空调风系统、防排烟系统4个方面,最后提出项目设计管理的措施,从方案制订、详细设计与安装施工3个方面着手,力求提高暖通空调设计效率,促进超高层建筑的可持续发展。

对银座商城建筑的评介与思考

对济南银座商城的建筑、结构、交通、室内外装修等设计进行了全面评介，对超高层商业建筑的城市空间景观功能、建筑容积率、抗震、防火等问题进行了探讨。