论城市规划学科体系

城市规划具有两层涵义,既包括城市规划所开展的工作,同时也包含对城市规划工作的相关的科学研究.但是其科学研究往往受到忽视.从城市规划学科发展的双核心模式角度提出了城市规划学科体系的构架,认为城市规划学由理论城市规划学、技术城市规划学和应用城市规划学三部分组成,而科学性内涵是城市规划学科体系架构的核心.     

论加强理工科院校的绿色教育

文章分析了入世后在理工科院校加强绿色教育的重要战略意义 ,探讨了绿色教育的内涵 ,针对国际上倡导的环境教育的内容 ,提出了在理工科院校实施绿色教育的途径     

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.     

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.     

浅谈重庆科技馆设计构思

从城市的自然地理特征,结合建筑的自身功能特点,体现建筑的地域性和特殊性。通过对玻璃和石材的解读,展现时城市的地理环境及人文精神的理解和诠释。空间穿插,营造生动的科技体验氛围。     

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.     

总承包中的深化设计管理研究

国内推行的建设项目总承包尚未与国际完全接轨,许多大型项目的设计都是由国外进行初步设计,由国内总承商深化设计后才能进行施工,这种设计模式存在一定的问题.本文从承包商角度论述了深化设计的管理内容、方法以及深化设计的项目管理体系,并针对工程总承包中存在的深化设计问题,提出了应对措施和建议.     

《世界建筑》100 期

《世界建筑》自１９８０年创刊以来已出版１００期，它介绍了大量的国内外的建筑信息和科技成果，为推动我国建筑科技发展起了重要的作用。     

推进性能化防火设计方法应用问题的探讨

讨论了在我国推进性能化防火设计方法过程中遇到的一些问题。     

Transport in regional science: The “death of distance” is premature

Transport costs have always been an important dimension in regional science. It is therefore remarkable that regional science and transport economics have developed in a rather unconnected way. Although being distinct, the routes of the two were parallel, and there are signs that the two fields will get closer to each other. This paper further discusses long run trends in transport costs and the potential spatial consequences. The main conclusion is that although in terms of money and time, the performance of transport has improved enormously, many economic activities have not become footloose to the extent as expressed by the notion of death of distance. One of the reasons discussed is the role of transaction costs, some being clearly related with distance.JEL Classification: R0, R4The authors thank the guest-editors and an anonymous referee for helpful comments.