大跨度曲面屋盖风压分布特性的试验研究

通过某机场航站楼的刚性模型风洞试验研究,得到了上下屋盖表面的平均、脉动风压系数,对其风压分布特性进行了研究。结果表明:上表面屋盖主要呈现负压,在屋盖迎风面边缘出现较大气流分离;下表面屋盖迎风面出现正压,背风面主要为负压,风压系数变化梯度较大,风荷载特性更加复杂。     

浅谈建筑的消隐

在当代建筑界出现了与追求建筑标志性外观相反的建筑理念——那就是让建筑消隐。消隐不只是消失,而是让建筑与环境结合,强调建筑的体验而非单纯的外观欣赏。通过消隐建筑的形体,建筑与环境的关系得以凸显,建筑的体验也变得更加完整丰富。消隐建筑的手法主要有形态消隐和材料消隐。     

Compression and extension yield of an anisotropically consolidated soil

A series of undrained and drained triaxial tests were conducted to investigate the yielding behavior of anisotropically consolidated reconstituted Shanghai clay under triaxial compression and extension loading conditions. The soil was consolidated with K of 0.5, where K is the ratio of cell pressure to axial pressure. The tests included drained constant η (=q/p′) loading tests and undrained and drained triaxial compression and extension shear tests on anisotropically consolidated specimens. It was found that the anisotropically consolidated Shanghai clay obeys Rendulic’s principle under compression loading, but not under extension loading, and that the yield surface inclined inside the state boundary surface under extension loading. Moreover, the pre-yield behavior and the post-yield behavior were found to be very different under these two loading conditions (compression and extension loading). The test results confirm the validity of the sloping elastic wall theory, and the influence of anisotropic parameter β on the shape of the yield curve in the p′?v plane was also studied in the paper. Constitutive modeling methods for anisotropic consolidated soils were also discussed based on the test results.     

灰系统理论预测地表裂缝的应用研究

人们用概率、数理统计和模糊数学来解决大样本不确定性问题和认知不确定性问题,灰色系统理论用来解决小样本不确定性问题.基于该原理,在极少量现场实测数据基础上,用灰色系统理论对某一地区地表裂缝在未来一段时间内的发展趋势进行了预测分析,取得了很好的成果.为控制该地区地表裂缝的进一步发展提供了理论依据.     

软土地基盾构隧道地表沉降的可靠性分析

本文基于中心点法和Peck公式,推导了盾构隧道地表最大沉降的可靠度计算方法。用软粘土条件下盾构隧道地表沉降的可靠度指标和失效概率说明,该方法为盾构隧道地表沉降的可靠性分析提供了一种新的有效途径。     

浅析城市道路白改黑改造中反射裂缝的成因及防治措施

沥青路面反射裂缝是城市旧路面改造的难点,本文通过的裂缝成因的全面分析,并从全过程控制的观点出发,给出一些防治方法,以期达到减少和防止反射裂缝的发生。     

以“隙间”角度来解析隈研吾的建筑表皮观

表皮通常作为展示建筑最真实、最直观的表现元素,包裸着建筑的空间与结构。随着时代的发展和科技的进步,建筑的表皮已成为一个独立的建筑要素。其逐步由单纯的建筑材质的表现,转为信息时代特征的媒体和建筑师思想的表达。     

试论光伏并网配电系统谐波治理的分析与研究

随着科技水平的不断提高,太阳能发电逐渐成为可能,而且与常规能源更加得接近,光伏并网发电的优势也逐渐显现出来。在我国很多地区（如江苏省等）,光伏发电已经作为一种可靠的再生能源,广泛地应用于办公、酒店、机场、商场等建筑。光伏发电在光伏并网发电系统中,采用的是电子装置,非线性负载对并网配电系统的电能质量影响比较大,尤其是谐波影响。本文将对光伏并网配电系统进行分析,并在此基础上就符合有效治理谐波,谈一下自己的观点和认识,以供参考。     

Evaluation and optimisation of receiver height in a compound parabolic collector with low acceptance angle

This research presents the method of finding an optimised location of a tubular receiver for a compound parabolic collector (CPC) with 6° acceptance angle. Due to low acceptance angle, reflected rays concentrate below the focus of a parabola. Graphical ray tracing (GRT) approach is implemented to execute the optical analysis with and without manufacturing error in the collector. It is performed on collector–receiver combinations by varying receiver height below the focus and they are compared on the basis of utilised area and projection ratios. The ideal cases of collector–receiver combinations which contribute high utilisation and projection ratio are selected and verified with the camera target method (CTM) performed on the actual set-up. It is built for water heater application to validate the results obtained from GRT and CTM. The thermal performance of CPC at various receiver heights is compared by thermal efficiency and therefore the optimum receiver height is concluded.     

Public reaction to wind development in California

Substantial controversy has been produced from the location of over 4000 wind turbines in San Gorgonio Pass, California. The principal point of controversy is the conflicting land use which results from developing wind power in a populated area. A public opinion survey was conducted which demonstrated that the vocal opposition to the wind turbines so commonly expressed is not borne out in fact. While there is indeed some opposition to the development of wind power at this site, particularly in terms of aesthetic degradation, the majority of respondents favoured the development. This level of approval will be of interest to those developing large wind projects elsewhere.