Numerical evaluation of wind effects on a tall steel building by CFD

A comprehensive numerical study of wind effects on the Commonwealth Advisory Aeronautical Council (CAARC) standard tall building is presented in this paper. The techniques of Computational Fluid Dynamics (CFD), such as Large Eddy Simulation (LES), Reynolds Averaged Navier-Stokes Equations (RANS) Model etc., were adopted in this study to predict wind loads on and wind flows around the building. The main objective of this study is to explore an effective and reliable approach for evaluation of wind effects on tall buildings by CFD techniques. The computed results were compared with extensive experimental data which were obtained at seven wind tunnels. The reasons to cause the discrepancies of the numerical predictions and experimental results were identified and discussed. It was found through the comparison that the LES with a dynamic subgrid-scale (SGS) model can give satisfactory predictions for mean and dynamic wind loads on the tall building, while the RANS model with modifications can yield encouraging results in most cases and has the advantage of providing rapid solutions. Furthermore, it was observed that typical features of the flow fields around such a surface-mounted bluff body standing in atmospheric boundary layers can be captured numerically. It was found that the velocity profile of the approaching wind flow mainly influences the mean pressure coefficients on the building and the incident turbulence intensity profile has a significant effect on the fluctuating wind forces. Therefore, it is necessary to correctly simulate both the incident wind velocity profile and turbulence intensity profile in CFD computations to accurately predict wind effects on tall buildings. The recommended CFD techniques and associated numerical treatments provide an effective way for designers to assess wind effects on a tall building and the need for a detailed wind tunnel test.     

Fatigue crack growth analysis of a square hollow section T-joint

Stress concentration sites are always found at the brace and chord intersection corners of any rectangular welded tubular joint. As a result, fatigue cracks are liable to be initiated and propagated from these corners. In this paper, the 3D fatigue crack growth under the weld toe of a square hollow section welded T-joint is simulated using boundary element method. In accordance with the 3D analyses, fatigue crack growth is predicted using a model based on the Paris’ law and stress intensity factors. Good agreement between the experimental and predicted crack growth and crack shape development is obtained. Based on this crack growth analysis, the fatigue life of a specimen is predicted and compared with the standard S-N curve for hollow section joints. It is found that the standard S-N curve is safe and slightly conservative.     

进入21世纪的中国近代建筑史研究

该文从对中国近代建筑史的基本认识入手，结合此项研究工作开展的三个时期，与西部大开发，与中国现代建筑创作中的“现代和传统”问题的关系以及中国近代建筑的保护与再利用，中国近代建筑中教学，中国近代建筑史研究中的国际合作与交流等问题简要论述，展望进入21世纪的中国近代建筑史研究。     

武汉工业学院新校区图书馆设计

通过对武汉工业学院新校区图书馆的方案设计,对现代图书馆的建筑设计特点进行了研究,指出其平面采用集约化布局方式,将编、藏、借、阅各区独立设置,分区明确,以建造出内部空间布局合理、视觉效果独特、文化内涵丰富的现代图书馆。     

Restorative wildscapes at work: an investigation of the wellbeing benefits of greenspace at urban fringe business sites using ‘go-along’ interviews

Abstract

The potential well-being benefits associated with the use of privately owned greenspaces in working environments have received little research attention. Given the growing evidence on the restorative benefits of urban greenspace, and the fact that many people spend most of their daily hours at the workplace, the question of whether physical access to green environments from workplaces can promote well-being is a pertinent one. Person–environment relationships in peri-urban business sites were investigated in a series of semi-structured ‘go-along’ interviews with employees at Scottish science parks. Workers described a range of well-being benefits from outdoor breaks and associated these with qualities of the environment. Semi-natural and informally landscaped areas were most strongly associated with restoration during the working day. The implications of the findings for the planning and design of business sites at the urban fringe are explored.     

中国现代建筑的传统继承

介绍了中国传统建筑的现状及中国建筑的发展历程,探讨了我国传统建筑的发展趋势及方向,指出对现代建筑的传统继承应从把握地域特色、结合所处环境着手,从而设计出既符合传统文脉、地域特色,又合乎时代要求的设计作品。     

走向新现代建筑

在工业时代向后工业时代过渡的当今之世,时代建筑正由经典现代建筑走向生态化、智能化和建筑文化多元化的新现代建筑.我们应关注新现代建筑的中国效应,积极创造具有中国文化特色和世界竞争力的中国式新现代建筑.     

厦门近代骑楼发展原因初探

该文通过探讨厦门近代骑楼形成的由来，分析了广东骑楼文化、南洋外廊式建筑文化以及地理环境与气候对厦门近代骑楼文化的影响，对研究厦门骑楼的历史渊源作了有益的探索。     

浅谈现代住宅设计

为了使现代化住宅设计符合世界发展趋势,推出了小康住宅设计主题,阐述了小康住宅设计的几个构想,其中特别强调了更新规划设计的观念和方法,综合考虑厨卫、阳台以及室内装修的设计,使设计效果达到一个新的境界。     

澳门近代建筑文化三议

澳门因葡萄牙人的长期居留而与中国其他城市不同，400年来从未间断的东西方多元文化交流给这块弹丸之地留下深刻影响，形成其独特的文化景观。该文抛开异质文化相遇融合的惯性思维，从宏观视野，特殊性能为遗产价值三方面剖析了澳门近代建筑文化的意义，以期获得对澳门近代建筑文化全新的认识与理解。