胡雪岩故居的水池构造

修复前我们对胡雪岩故居的几座水池都进行了发掘清理 ,清理每座水池均发现在水池驳坎壁面内 (驳坎采用太湖石叠砌在池内壁 ,湖石后又采用青石板平贴在这些洞的壁面 )有排列整齐的半圆洞。这些洞 ,好似隐蔽在水池驳坎的壁内 ,高度略低于驳坎 ,但要比驳坎深。半圆洞直径均为 0 .     

某有限元分析软件在变壁厚矩形水池计算中的应用

本文介绍了运用某有限元分析软件对变壁厚水池实例进行有限元分析的方法,探讨了弹性地基上此类水池的计算方法。变壁厚水池比等壁厚水池结构设计更合理,本文的计算结果精确,计算分析方法和结论可供工程设计人员参考。     

钢筋混凝土敞口水池壁厚与池深关系的探讨

运用世纪旗云水池计算软件,通过有限元模型试算,对某工业钢筋混凝土敞口水池的受力情况进行了研究,分析比较了不同壁厚情况下,裂缝、配筋及土建工程量的关系,从而得出比较合理的水池壁厚与池深的关系。     

某变壁厚高大水池的设计与有限元分析

详细介绍了运用MIDAS/Gen软件,对变壁厚高大水池进行有限元分析的方法和实例.计算结果精确,完全满足工程设计的需要.变壁厚高大水池相比扶壁式等壁厚水池,结构设计更为合理.这种结构型式既满足工艺要求,又经济美观.本文的计算分析方法和结论可供设计人员参考.     

有效杜绝水工构筑物水池壁渗水

结合工程实例对水池池壁细部节点渗水原因进行了分析,找出了影响渗水的主要原因,进而对各因素进行研究,提出了措施和处理方法,从而解决了水池壁渗水问题。     

复杂组合水池结构设计要点及变壁厚池壁有限元分析

应用ANSYS有限元分析软件,结合实际组合水池案例,介绍了大型组合水池结构分析的要点。同时,对不同尺寸的变壁厚水池的池壁进行有限元分析,给出了壁厚改变与池壁长度的改变对池壁内力的影响,为类似变壁厚水池内力变化趋势提供了有数量的概念设计依据。     

污水处理厂A~2/0污水池池壁裂缝控制措施

本文介绍了污水处理厂A2/0池58.2m长池壁裂缝控制措施,提出了普通砼以降低总温差和提高砼极限拉伸值来控制超长水池壁出现裂缝的方法。     

排水池透水底板及透水池壁的新作法

排水池透水底板及透水池壁的新作法天津新开河二期工程是引滦入津的重要配套工程，该工程在污水和污泥处理系统中，兴建了两座长６ｌｉｎ、宽１９．７ｍ、深４．ｓｉｎ的全地下敞开式钢筋混凝土排水池。由于排水池的水位经常变化，而且定期清理时要通过集水井排空。所以，...     

污水处理厂A2/O污水池池壁裂缝控制措施

本文介绍了污水处理厂A^2／O池58．2m长池壁裂缝控制措施,提出了普通砼以降低总温差和提高砼极限拉伸值来控制超长水池壁出现裂缝的方法。     

斜壁水池无内模浇注混凝土

川化水源工程,有两个园形加速沉清池,高十多米,直径二十九点四米。这两个水池都有四十一点五度的斜壁,壁高八米,好象两口大铁锅。浇注这样大的混凝土直壁水池,省建六公司二处四队的同志们是干过的。但是,要用混凝土浇注这样大的斜壁水池     

高层建筑消防水池设置条件剖析

本文对设计规范中关于设置消防水池的条文进行了解剖,分析了条文的实际含意,阐明了判别消防水池设置条件和计算消防水池设计容量的方法。     

火炬塔架钢管径厚比限值讨论

我国对钢结构局部稳定宽厚比限值做出规定的规范主要有:《钢结构设计规范》和《建筑抗震设计规范》,两种规范对局部稳定宽厚比分别做出限定,限值规定相差很大,但并没有对限值的采用做出明确解释。文章以石油化工钢管火炬塔架的径厚比为例,通过国内外规范及文献对钢管径厚比规定的对比分析,指出我国规范对钢结构局部稳定径厚比规定与国外的差距,规范对普通钢管结构的径厚比限值有待进一步研究。     

消防水池的充分利用

本文从经济、实用角度对改进型水冷系统和以往冷却系统进行比较,并从设计角度列出了利用消防水池作冷却水系统的设计步骤。     

民用建筑消防水池设计要点

结合相关规范,详述了消防给水设计中关于消防水池有效容积、保护半径的一些具体设计细节,并列举了设计中的一些具体做法和注意事项,可供设计人员参考.     

火灾下钢管混凝土柱承载力研究

参照日本规范,推导了适用于我国钢管混凝土柱的抗火验算公式,并对本文公式和按常用参数回归得到的公式进行了比较,最后采用对某大厦钢管混凝土柱进行了火灾下的承载力验算.2004年出版的《矩形钢管混凝土结构技术规程》CECS159：2004,给出了矩形钢管混凝土抗火验算方法,但关于圆形钢管混凝土构件目前尚无相应的抗火计算方法.     

Long-term storage of chilled water in cisterns in hot,arid regions

Seasonal storage of chilled water in a large underground reservoir was studied by considering a two-dimensional heat flow in water and the soil surrounding the cistern, and by employing a finite-difference technique for the numerical solution of the energy equations. The cistern considered in the analysis was similar to those which have been employed in the hot, arid region of Iran for centuries for the storage of cold potable winter water for summer use. These cisterns were filled with cold water in winter and water removal did not start until mid-spring. During the water storage and usage, there was always a wind-induced airflow over the water surface to maintain an evaporation rate from the water surface. In these cisterns the water removal was from the bottom at such small flow rates that the thermal stratification in the cistern was not disturbed.It was found that while the temperature of water at the surface was high and followed the ambient air temperature closely, the temperature of the water removed from the bottom was very low, although it increased gradually toward the end of the storage season. During the summer months the temperature of water removed from the bottom of the cistern was below 10°C. This temperature was found to be a function of the size of the cistern, the weather conditions, the initial temperature of water in the cistern, the soil properties, and the year of operation of the cistern.The system analyzed here finds applications in the hot, arid regions of the developing countries for the storage of cold winter water for drinking, for food preservation, or for other agricultural and industrial applications. It can also be used for air conditioning of buildings.     

某污水处理站复用水池上浮事故的分析与处理

针对某污水处理站水池出现的上浮现象,从水池整体抗浮稳定验算和局部稳定验算两方面分析了水池上浮原因,并得到了地下水位最低控制线.提出采用井点降水、底板注浆、贮水池混凝土柱补强、石灰挤密桩处理四周土体等方法对水池进行抗浮处理.实践表明,该处理方案抗浮效果好,且具有造价低廉、技术可行性强的优点,水池经抗浮处理后满足使用要求.     

Flexural behaviour of stainless steel oval hollow sections

Structural hollow sections are predominantly square, rectangular or circular in profile. While square and circular hollow sections are often the most effective in resisting axial loads, rectangular hollow sections, with greater stiffness about one principal axis than the other, are generally more suitable in bending. Oval or elliptical hollow sections (EHS) combine the aesthetic external profile of circular hollow sections with the suitability for resisting flexure of rectangular sections, whilst also retaining the inherent torsional stiffness offered by all tubular sections. This paper examines the structural response of recently introduced stainless steel oval hollow sections (OHS) in bending and presents design recommendations. In-plane bending tests in the three-point configuration about both the major and minor axes were conducted. All tested specimens were cold-formed from Grade 1.4401 stainless steel and had an aspect ratio of approximately 1.5. The full moment-rotation responses of the specimens were recorded and have been presented herein. The tests were replicated numerically by means of non-linear finite element (FE) analysis and parametric studies were performed to investigate the influence of key parameters, such as the aspect ratio and the cross-section slenderness, on the flexural response. Based on both the experimental and numerical results, structural design recommendations for stainless steel OHS in bending in accordance with Eurocode 3: Part 1.4 have been made.     

广州新白云国际机场航站楼钢结构设计

本文介绍了广州新白云国际机场航站楼钢结构设计。航站楼钢屋盖面积约160000m2,全部采用相贯焊接的圆管及方管圆弧形钢桁架结构,是中国目前规模较大的空心管结构工程,其中16～37m高的三角形变截面(三管梭形钢格构)人字形柱、12m及14m跨度的屋面箱形压型钢板是首次在中国应用。设计中还采用了多种形式的相贯节点,包括圆管正偏心的间隙接头及方管的搭接接头。     

Design charts for the general instability of ring-stiffened conical shells under external hydrostatic pressure

The paper describes experimental tests carried out on three ring-stiffened circular conical shells that suffered plastic general instability under uniform external hydrostatic pressure. In this mode of failure, the entire ring–shell combination buckles bodily in its flank. The cones were carefully machined from EN1A mild steel to a very high degree of precision.Using the results obtained from these three vessels, together with the results obtained from elsewhere, the paper also provides two-design charts, which are much easier to use than older design charts. The design charts allow the possibility of obtaining a plastic knockdown factor, so that the theoretical elastic buckling pressures for perfect vessels, can be divided by the plastic knockdown factor, to give the predicted buckling pressures. Although similar design charts have been produced in the past, the design charts presented here are based on using the simpler ring-stiffened circular cylinder, which has been made equivalent to the much more complex ring-stiffened circular conical shell. The advantage of using this method is that it is simpler and the design time is reduced by a factor of about 10 with little loss of precision. This method can also be used for the design of full-scale vessels.