Modeling investment priorities for national road improvements: A case study of Korea

The paper addresses specific problems associated with formulating investment priorities for national road improvements in Korea. More specifically, the objectives of the paper are (1) to present a model for formulating investment priorities for road improvements that may be useful to developing countries, (2) to test the model with simplified data for deriving investment priorities for Korea's road improvements, and (3) to learn lessons that can be applicable to other developing countries with particular respect to recommending investment priorities for road improvements. The study results are useful for planners, in developing countries, and also for evaluation analysts in funding institutions who are confronted with evaluating investment priorities for deteriorating road conditions.     

济南市集中供热蒸汽管网热损失的调查及分析

本文调查了济南市蒸汽管网的情况,分析了集中供热蒸汽管道热损失的组成,通过采集济南市具有代表性的三个蒸汽管网的运行数据,计算了其热损失,绘制了蒸汽管网的热损失率曲线图并对其进行了分析,对济南市的蒸汽管网提出了整改建议可供参考。     

On the shear strength of reinforced concrete deep beam with web opening

An objective of this study is to establish the shear strength of reinforced concrete deep beam with web opening. Eighteen beams were tested with the variables of the steel ratio and strength of longitudinal bars, concrete strength, and shear span‐to‐depth ratio. It was observed that the opening is strengthened by longitudinal bars but the load‐carrying capacity of deep beams with openings can be largely improved by the increase in concrete strength. Modifying the softened truss model derived by Mau and Hsu and utilizing the results of this experiment carried out with the variables of concrete strength, cross‐section size, shear‐span‐to‐depth ratio, and the strength and steel ratio of longitudinal bars, this study proposes an improved model to predict the shear strength. Copyright © 2006 John Wiley & Sons, Ltd.     

浅谈图底关系理论在城市设计中的应用

图底关系理论是美国康奈尔大学的罗杰·特兰西克教授在《寻找失落的空间》一书中提出的一种有关城市设计的重要理论。本文着重探讨了该理论在城市设计中的应用前景,并通过实例阐述了该理论在城市空间总体层面和城市空间具体层面上的应用价值和方法。     

关注建筑表皮——托马斯.赫尔佐格与赫尔佐格&德梅隆的建筑表皮设计手法比较

建筑表皮是近年在建筑界关注的热点,而托马斯·赫 尔佐格以及赫尔佐格＆德梅隆是在这个方面很活跃的世界级建 筑师。文章试从建筑表皮设计的角度出发对他们的设计手法进 行比较分析。尽管他们设计的出发点,材料的运用,以及对建筑 艺术与技术侧重的不同,造就了他们设计手法的差异。但他们都 设计出了优秀的作品,实现了技术与艺术完美的结合。     

空调水系统变流量节能控制(续1):水流量变化对空调系统运行的影响

分析了一级泵水系统采用温差控制法实现变流量运行对空调系统运行的影响。认为变流量运行不会对冷水机组和末端装置产生影响。根据变流量系统使用场合的不同。提出了相应的控制策略。     

经济适用房设计应关注老龄化问题

文章根据老年人生理、心理和社会角色等方面变化的特点,就当前我国经济适用房设计中与老年人密切相关的居住空间无障碍设施、套型模式及交往空间等三个问题作了扼要的论述,并提出一些相应的措施.     

如何做好城建档案业务指导工作

本文通过笔者多年的工作实践,结合业务指导工作的范围和内容,从档案业务指导工作的特点和方法的角度提出了几点做法。     

SOLO青年公寓，天津，中国

先前的天津工人区将成为这个发展中的港口城市的新兴住宅基地。 地段设计的任务书要求提供小型住宅：中国住宅市场中为青年人定制的工作室。由于要为这些小单元提供足够的采光，我们在这个地段上依据规范的要求设计了一系列的塔楼，以获得最大化的立面长度。     

Modification of -equation in the SSRC Guide for buckling of monosymmetric I-beams under transverse loads

Finite element buckling analyses of monosymmetric I-beams subjected to transverse loading applied at different heights with respect to the mid-height of the cross-section were conducted. Transverse loads consisting of a mid-span point load and a uniformly distributed load were considered in the investigation. Four types of end restraint also were considered. The method suggested in SSRC Guide was compared with the finite element method (FEM) results. In order for C-equation in the SSRC Guide to be applicable for monosymmetric I-beams, it must be modified to contain three variables; A_m, B_m, and D_m. The first two variables A_m and B_m are modified variables A and B in the SSRC Guide whereas the third variable, D_m, developed herein, is the new modification factor for monosymmetric I-beams. The applicability of this new design rule is limited to monosymmetric I-beams in which the degree of monosymmetry, ρ, is within the range from 0.1 to 0.9.