试析高层建筑结构抗震设计理念及方法

高层建筑抗震工作一直是建筑设计和施工的重点,概述高层建筑的发展,对建筑抗震进行必要的理论分析,从而来探索高层建筑的设计理念、方法,并提出了必需的抗震措施。     

高层建筑抗震设计中的常见问题及对策探讨

当前抗震设计已然成为高层建筑设计和施工不可或缺的重点工作,本文将对高层抗震的相关设计以及可能出现的常见问题进行深入地分析,并探讨解决这些问题的对策及措施。     

高层混凝土建筑结构的抗震设计

经济快速发展使得城市化进程不断加快,越来越多的高层建筑在城市中拔地而起。高层建筑逐渐成为社会关注的重点,高层建筑结构设计中的重中之重就是抗震设计,如果抗震设计不达标就会严重影响到高层建筑的抗震安全性,所引发的建筑安全事故会难以想象。因此,文章从高层混凝土建筑抗震结构设计机理展开论述,就高层建筑混凝土结构抗震设计的现状进行分析,最后针对高层混凝土建筑抗震结构设计要点提出了自己的建议。     

高层建筑结构的抗震方法

高层建筑结构的抗震日趋成为关注的焦点,本文根据抗震设计目标出发,总结了高层建筑抗震的方法。为实际高层建筑结构抗震分析提供一定参考。     

时程分析法在高层建筑抗震支吊架抗震设计中的应用研究

建筑抗震支吊架在地震中能对建筑机电工程设施给予可靠的保护,因此,必须准确计算建筑抗震支吊架的地震反应并进行抗震设计。论文采用时程分析法建立了高层建筑抗震支吊架的抗震设计方法,详细阐述了高层建筑结构-支吊架的耦合计算模型、地震波的选取原则和地震作用的计算方法。框架结构、框剪结构和框筒结构的3个工程实例表明,采用时程分析法可以准确计算高层建筑抗震支吊架的地震作用,其相比等效侧力法具有显著的应用优势。     

超限高层结构抗震性能化设计方法探讨北大核心CSCD

随着我国超限高层建筑的大量涌现,团体标准《建筑结构抗震性能化设计标准》已颁布实施,对超限高层结构的抗震设计产生一定的影响。针对超限高层结构抗震性能化设计和抗震设防审查中若干值得探讨的问题,首先总结了超限高层结构抗震性能化设计方法;然后重点探讨了超限高层结构抗震性能化设计的3个重要指标:剪重比、框剪比和中震墙肢拉应力,提出了上述指标不满足规范要求时可采用基于抗震性能化设计的解决措施;最后,阐述了基于预设屈服模式的抗震性能化设计新方法。结果表明:长周期高层建筑的剪重比不满足限值时,建议通过修正反应谱的长周期段,验算结构的侧向刚度;对于框剪比限值,建议根据大震下的内力重分布规律对小震设计的框架剪力进行调整;基于预设屈服模式的抗震设计方法可实现对超限结构破坏模式的控制。     

高层建筑抗震方法

高层建筑结构的抗震日趋成为关注的焦点,本文根据抗震设计目标出发,总结了高层建筑抗震的方法。     

浅谈西部地区高层建筑结构抗震设计

对西部地区高层建筑结构抗震设计中所涉及到的问题进行分析和研究。文章从影响高层建筑物抗震性能因素分析、完善高层建筑结构抗震设计有效对策、高层建筑抗震中结构分析及设计方法三个方面来讨论高层建筑抗震设计。并对未来抗震设计提出展望。     

中美高层建筑结构基于性能抗震设计规范之对比

基于性能的抗震设计是各国工程结构抗震设计规范未来的主要发展方向,目前许多国家已将基于性能抗震设计思想纳入抗震规范中。高层建筑采用基于性能抗震设计已成为必然趋势,本文主要对中美两国规范对于高层建筑结构基于性能抗震设计的性能目标、分析与设计方法等要点进行对比分析,发现中美两国高层建筑基于性能抗震设计规范各有特色,可以相互借鉴学习和提高。     

浅析高层建筑抗震设计要点分析

高层建筑作为现代建筑的代表,其抗震设计仍旧是主要设计要素和项目工程的重点内容。出于对高层建筑的特殊性考虑,在进行抗震设计时,应采取严格的技术措施确保整体建筑安全。本文主要介绍了高层建筑抗震设计的基本原则,具体分析了高层建筑的抗震设计要点。     

我国高层建筑钢结构发展的主要问题

本文概述了我国目前高层钢结构建筑现状，指出了我国高层钢结构发展的三大问题，即：国产化问题、综合效益问题和结构设计问题。本文论述了我国高层钢结构国产化已具备的条件，分析了高层建筑各部分投资比例及采用钢结构在经济性能和结构性能上的优势，讨论了目前我国高层钢结构设计存在的主要问题。     

高层建筑结构设计与高层建筑结构方案的合理性

介绍了高层建筑结构的设计特点,高层建筑结构常用的结构体系特点分析及新结构体系最新发展趋势;结合在建工程实例论述合理的结构方案即最优的结构设计对于高层建筑结构设计成败的重要意义,能否达到最优结构设计对结构满足建筑功能要求、结构经济性方面有较大差异。     

超限高层建筑结构基于性能抗震设计的研究

基于性能的设计方法已引起工程界的关注 ,在超限高层建筑的结构抗震设计中 ,采用基于性能要求的抗震设计方法 ,有助于提高高层建筑工程抗震设计的可靠性、避免抗震安全隐患 ,同时又促进高层建筑技术发展。本义阐述基于性能抗震设计方法与常规抗震设计方法的比较 ;针对超限高层建筑结构的特点 ,提出结构的抗震性能目标、性能水准以及实施性能设计的主要方法 ,包括性能水准判别准则、性能目标的选用及结构计算和试验要求。文中还列举了应用性能设计理念和要求的部分工程实例。     

高层建筑构成要素探究——浅析南京农业大学逸夫教学楼建筑设计

全面深入地剖析构成要素,既是理性认知高层建筑的基本途径,也是进行建筑创作设计的重要环节。文章以南京农业大学逸夫教学楼为例,依次从标准层设计、结构选型与概念设计、防火设计、设备系统以及立面与造型设计详细分析了高层建筑中常考虑的构成要素,分层理析地阐释了对高层建筑设计的理解。     

Effect of vertical structural irregularity on seismic design of tall buildings

Many tall buildings are practically irregular as an entirely regular high‐rise building rarely exists. This study is thus devoted to assessing the approach and coefficients used in the seismic design of real‐life tall buildings with different vertical irregularity features. Five 50‐story buildings are selected and designed using finite element models and international building codes to represent the most common vertical irregularities of reinforced concrete tall buildings in regions of medium seismicity. Detailed fiber‐based simulation models are developed to assess the seismic response of the five benchmark buildings under the effect of 40 earthquake records representing far‐field and near‐source seismic scenarios. The results obtained from a large number of inelastic pushover and incremental dynamic analyses provide insights into the local and global seismic response of the reference structures and confirm the inferior local response of tall buildings with severe vertical irregularities. Due to the significant impacts of the severe irregularity types on the seismic response of tall buildings, the conservative code approach and coefficients are recommended for design. It is also concluded that although the design coefficients of buildings with moderate irregularities are adequately conservative, they can be revised to arrive at more consistent safety margins and cost‐effective designs.     

Interference excitation of twin tall buildings

The enhanced dynamic response of a tall square building under interference excitation from neighbouring tall buildings has been studied in a series of wind-tunnel model tests. In a low-turbulence wind environment and under normal strong wind conditions, the dynamic loads on the upstream of an identical pair of tall buildings may increase by a factor of up to 4.4. The dynamic loads on the downstream building of the pair may increase by a factor of up to 3.2 due to “resonant buffeting”. Measurements of along-wind and cross-wind force spectra and a number of wake spectra provide an explanation for the observed behaviour. Possible excitation mechanisms are discussed and critical building arrangements presented. The large interference loads found in this study indicate that interference excitation should be carefully considered in the design of tall buildings.     

The effect of plan ratios on wind interference of two tall buildings

Tall buildings are vulnerable to lateral loading. The facades of these buildings are susceptible to wind loads. It is very difficult to assess the wind condition around the tall building in the presence of other surrounding buildings due to the wind interference effect. An experiment is carried out in the Boundary Layer Wind Tunnel at Tokyo Polytechnic University, Japan, to study the wind interference effect on tall buildings with varying plan ratios. The maximum and minimum local peak pressure coefficient contours on front face of the principal building are plotted. The interference effect is quantified in terms of interference zone charts. It is observed that interference zones extend over a larger area as the building plan ratios increases. The minimum interference factor depends on the plan ratios of the interfering building especially along the oblique direction. The results of this study may be useful for the preliminary design of cladding of tall buildings with interfering buildings.     

VED控制高层钢结构建筑地震反应的研究

文章研究用于控制高层钢结构建筑地震反应的粘弹性阻尼器 (VED)设计方法。首先建立支撑杆的单元复刚度矩阵 ,求解结构等效阻尼比 ,在此基础上 ,进行阻尼器参数设计 ,提出了适合于一般钢结构的设计方法和适合于剪切型钢结构的简便方法。然后以一十二层高层钢结构为例 ,验证了阻尼器对高层钢结构建筑地震反应控制的良好效果     

An inter‐story drift‐based parameter analysis of the optimal location of outriggers in tall buildings

Outriggers are usually added in structural systems of tall buildings to collaborate central shear walls with peripheral columns. With outriggers, the structural overturning moment can be balanced, and the inter‐story drift can be controlled under horizontal loads. Therefore, the optimal location of outriggers plays a very important role in controlling the behavior of the whole building. Existing research has focused on the optimal position of outriggers on the base of the structural roof deflection. In the engineering practice, however, inter‐story drift is the most important target to control the design of tall building structures. This paper investigates the theoretical method of inter‐story drift‐based optimal location of outriggers. A Matlab program is written to perform the parameter analysis of optimal location of outriggers. Take a 240‐m tall building for a target building, the optimal location of one to three sets of outriggers under wind and earthquakes is obtained and can be utilized for the structural preliminary design of tall buildings. Copyright © 2015 John Wiley & Sons, Ltd.     

Perception of vibration and occupant comfort in wind-excited tall buildings

Wind-induced building vibration can interfere with building occupants’ daily activities and general well-being. However, human perception of vibration and tolerance of wind-induced tall building vibration are essentially a subjective assessment. Hence, there is currently no single internationally accepted occupant comfort serviceability criteria which set a design standard for satisfactory levels of wind-induced vibration in tall buildings. This paper reviews past studies on human perception of vibration and tolerance thresholds of wind-induced tall building vibrations. Building vibration acceptability and occupant comfort criteria that have been commonly adopted for the assessment of occupant comfort in wind-excited tall buildings are outlined.