压型钢板屋面排水设计分析

压型钢板屋面体系是与轻钢建筑体系配套的新型屋面型式,发展前景十分广阔,本文针对其屋面渗漏问题,重点从压型板的种类、压型板屋面的排水坡度及单坡长度、压型板屋面采光带的设计和压型板屋面设计的声学问题讨论了压型板屋面排水设计     

连续屋脊金属压型板在屋面工程中的应用

大型公共建筑金属屋面按双坡排水时,屋脊处通常采用泛水板搭接,易产生渗漏。通过对金属屋面密闭性、渗漏性、耐久性等功能的分析,以上海东方体育中心游泳馆屋面工程为例,提出一种连续屋脊金属压型板的工艺设计思路,与不连续屋脊压型板相比,该工艺可现场施工,用于双坡建筑屋面,可节材约6%,工期缩短约2%。     

长尺弧形屋面压型板的加工和安装

以上海浦东国际机场T2航站楼屋顶采用的长110m,正、反弧隐藏式压型钢板为依据,对解决长尺压型板加工、安装和温度伸缩两大难题的方法进行研究。通过对长尺压型板的构造、加工以及垂直和水平运输措施等对建筑物适应性的分析,对设计、施工工艺进行优化,使长尺金属屋面和施工工艺发挥最大的功效。     

连续多组正反弧压型机组的研究与应用

因上海浦东国际机场T2航站楼建设需要,研制国际领先水平的正反弧、压型、弯弧一体化程控加工机械,生产出长110m反→正→反弧隐藏式压型板。     

压型金属板的新发展

本文介绍了适合国情的压型金属板、组合楼板的压型板、嵌缝式压型板、压扣式压型板、曲面压型板等,并对采用压型板的建筑保温问题进行了探讨。     

彩色压型钢板在宝钢工程中应用

彩色压型钢板普遍地应用于宝钢工程中，特别是三期工程，采用固定件为隐藏式的压型板提高了防腐防雨的性能，取得了良好的效果．     

用K.S.T.系列产品解决彩钢压型板屋顶渗漏

指出了彩钢压型板结构的常见渗漏部位，介绍了使用美国K．S．T．特种防水堵漏材料能解决彩钢压型板屋面渗漏的方法。     

硬质聚氨酯喷涂泡沫在彩钢压型板屋面体系中的应用

在彩钢压型板屋面体系中采用硬质聚氯酯喷涂泡沫，不仅可以降低建筑物能耗，消除冷桥，避免结露，而且其与外层彩钢压型板形成复合防水体系，从根本上杜绝了彩钢压型板屋面的渗漏。     

建筑施工中大型厂房压型板漏雨的预防和修复技术

随着科学技术的进步,压型板凭借自身的优势被应用到大型厂房等工业建筑中。但是,如果压型板安装施工处理不到位容易引发漏雨现象,为此,本文通过分析大型厂房压型板漏雨原因,提出大型厂房压型板漏雨的预防措施和漏水修复措施,为安装压型板提供参考。     

压型钢板楼板简介

压型钢板(以下简称压型板)做建筑的楼板、屋面板已广泛地应用在工业与民用建筑中。一、压型板楼板的特点压型板做楼板的原理如图1所示,它既能承受建筑物的一部分荷载,又为动力和电话等线路安装提供了空间。另外,使用该楼板     

施工阶段压型钢板侧向支撑作用探讨

随着组合楼板体系应用的越来越广泛,对其研究也越来越深入,但由于压型钢板的非各向同性,所以世界上多数国家,包括我国关于压型钢板侧向支撑作用的问题较少提及。通过某工程实例,对德国规范与我国标准中此内容进行对比分析,可知,在施工过程中,混凝土尚未凝结时,应考虑压型钢板对梁的侧向支撑作用。     

Komplexe Dachformen und ihre Anforderungen an die Unterkonstruktion

Complex roof shapes and the demands they place on the substructure. Over the past two decades the design requirements placed on the shapes of roofs made from roll‐formed aluminium profiled sheet have increased markedly, regardless of whether the sheet has a simple rectangular shape, is curved in a convex or concave manner and cut conically or is tapered or bulged out in a defined manner to produce elliptically or hyperbolically shaped sheets for building envelopes. Thanks to new roll‐forming technologies, it is now possible to produce profiled sheets that are no longer symmetrical with respect to their longitudinal axis and which can be tapered or bulged out, twisted in a planar manner about their broad flutes or curved. Two spectacular building projects completed in recent years clearly illustrate the enormous amount of effort needed for preparation and execution – from the planning of the supporting structure through to its installation and from the substructure and its measurement through to the actual covering of the roof – in order to design, manufacture and process such three‐dimensionally shaped profiled sheets to satisfy the demands made by clients and planners with respect to the aesthetics and function of the aluminium profiled sheets, and thus the building envelope.     

基于ANSYS的自攻螺钉波峰连接的抗剪性能有限元分析

为了满足防水要求,目前许多轻钢结构的屋面体系采用在压型钢板波峰处与构件连接的形式。由于波峰连接形式中,压型钢板和檩条不是紧密接触,因此比波谷连接形式的受力情况更加复杂。本文利用ANSYS程序,采用实体建模,并引入接触非线性,对自攻螺钉波峰连接的抗剪性能进行有限元模拟分析,并与试验结果进行对比分析。分析结果表明:有限元模型可以精细模拟出真实试件的变形和荷载位移曲线的走势,与试验结果拟合很好,应力分布规律也符合其变形和破坏模式。因此,此有限元模型可以作为替代试验分析的理想模型。     

Local buckling behaviour of trough girders composed of an assemblage of profiled steel sheets

The local buckling behaviour of profiled trough girders in bending, made from cold formed profiled steel sheeting and used for profiled composite beams, is studied using an elastic finite strip method. The simplified method assumes that there is no shear stress present within the buckling half-wavelength, and is thus applicable to the uniform bending case where no moment gradient exists. Three typical types of profiled steel sheeting configurations are studied in the form of profiled trough girders, and these are investigated comparatively. The variation of the elastic local buckling coefficient with the cross-sectional parameters is demonstrated for each of the three typical rib shapes. An example of the local buckling of a typical profiled through girder is given.     

Web crippling behaviour of laterally restrained cold-formed steel re-entrant profiled deckings

Web crippling failure is often found to be critical in cold-formed steel profiled deckings during construction of composite slabs. Therefore, accurate prediction to the web crippling resistances of profiled deckings over internal supports under hogging moment is highly desirable. This paper presents an extensive experimental investigation into the structural behaviour of laterally restrained re-entrant profiled deckings under concentrated loads. A total of 104 web crippling tests on fully supported re-entrant profiled deckings with nominal yield strengths at 235 and 550 N/mm² are carried out to provide data for direct comparison with design resistances obtained from codified design rules. It should be noted that in the past, little attention has been paid to establish the lateral restraint condition of profiled deckings under concentrated loads in tests. Hence, local section distortion or ‘section spreading’ is often observed in tests but seldom dealt with rigorously during design development. In the present study, effective lateral restraints are provided to the test specimens in order to fully mobilize the web crippling resistances of the profiled deckings. It is found that the measured web crippling resistances are typically 20%–40% higher than those obtained from the codified design rules given in BS5950: Part 6, Eurocode 3: Part 1.3 and the North America Specification, depending on the steel grades and thicknesses, the load bearing lengths as well as the loading conditions.

In general, both BS5950 and Eurocode 3 give conservative web crippling resistances for re-entrant profiled deckings with both low and high strength steel under internal and end loading conditions. Moreover, the corresponding resistance factors determined according to a codified reliability analysis are considerably larger than the required values. Thus, the design rules are reliable and conservative, although they tend to be very conservative for profiled deckings under end loading condition. However, an examination on the design rules given in the NAS shows that only some of them are applicable to predict the web crippling resistances of low and high strength steel re-entrant profiled steel deckings. The design rule for IOF condition always gives both conservative and reliable resistances for both low and high strength steel profiled deckings, compared to the measured values. The design rule for EOF condition is also found to be both conservative and reliable for low strength steel profiled deckings only, but not for high strength steel profiled deckings. The design rules for ITF and ETF conditions are not applicable for both low and high strength steel profiled deckings according to the reliability analyses.

It is demonstrated that a set of new design rules specifically for re-entrant profiled deckings is needed for both improved efficiency and reliability. Moreover, the comprehensive set of test data is readily adopted to calibrate both finite element models and design expressions in subsequent studies.     

钢结构围护系统压型钢板介绍及选择

介绍了压型钢板的分类及目前国内常用的板型,从不同角度阐述了如何选择压型钢板,为钢结构围护系统压型钢板选择提供参考,从而使工程项目更加经济、合理、美观。     

An efficient algorithm for architecture design of Bayesian neural network in structural model updating

There has been growing interest in applying the artificial neural network (ANN) approach in structural system identification and health monitoring. The learning process of neural network can be more robust when presented in the Bayesian framework, and rational architecture of the Bayesian neural network is critical to its performance. Apart from number of hidden neurons, the specific forms of the transfer functions in both hidden and output layers are also crucially important. To the best of our knowledge, however, the simultaneous design of proper number of hidden neurons, and specific forms of hidden‐ and output‐layer transfer functions has not yet been reported in terms of the Bayesian neural network. It is even more challenging when the transfer functions of both layers are parameterized instead of using fixed shape forms. This paper proposes a tailor‐made algorithm for efficiently designing the appropriate architecture of Bayesian neural network with simultaneously optimized hidden neuron number and custom transfer functions in both hidden and output layers. To cooperate with the proposed algorithm, both the Jacobian of the network function and Hessian of the negative logarithm of weight posterior are derived analytically by matrix calculus. This is much more accurate and efficient than the finite difference approximation, and also vital for properly designing the Bayesian neural network architecture as well as further quantifying the confidence interval of network prediction. The validity and efficiency of the proposed methodology is verified through probabilistic finite element (FE) model updating of a pedestrian bridge by using the field measurement data.     

闭口型压型钢板——混凝土组合板承载能力试验研究

闭口型压型钢板—混凝土组合板中,压型钢板能更好地起到受拉钢筋的作用,比开口型压型钢板—混凝土组合板有更多性能优势和更好的应用前景。通过八块采用新型BONDEKⅡ型闭口型压型钢板的组合板的静力性能试验研究和理论分析,着重考察剪跨比和组合板端部栓钉布置对组合板受力性能、破坏形态和极限承载能力的影响,提出了该类闭口型压型钢板的组合板的受弯承载力、竖向受剪承载力和纵向剪切粘结破坏承载力的计算方法及公式,为组合板设计计算提供依据。