大跨度钢管混凝土拱桥非线性稳定分析

本文针对钢管混凝土的研究现状，对大跨度钢管混凝土结构非线性稳定作了具体研究。几何非线性对大跨度钢管混凝土拱桥的稳定性影响较小，材料非线性对大跨度钢管混凝土拱桥的稳定性影响较大，同时考虑几何非线性和材料非线性后，大跨度钢管混凝土拱桥的稳定系数最小。     

钢管混凝土拱桥自密实混凝土顶升施工技术

钢管混凝土拱桥在国内桥梁建设中的应用日益增多,而钢管拱混凝土灌注则是钢管混凝土拱桥施工成败的关键之一。文章重点介绍了钢管混凝土拱桥自密实混凝土泵送顶升施工过程中的自密实钢管混凝土配合比试验研究、顶升设备选型、顶升施工工艺等几个关键技术问题。     

钢管混凝土拱桥自密实混凝土顶升施工技术

钢管混凝土拱桥在国内桥梁建设中的应用日益增多,而钢管拱混凝土灌注则是钢管混凝土拱桥施工成败的关键之一。文章重点介绍了钢管混凝土拱桥自密实混凝土泵送顶升施工过程中的自密实钢管混凝土配合比试验研究、顶升设备选型、顶升施工工艺等几个关键技术问题。     

小议钢管混凝土结构的特点与应用

钢管混凝土结构是由混凝土填八钢管内而形成的一种新型组合结构.由于钢管混凝土结构能够更有效地发挥钢材和混凝土两种材料各自的优点,同时克服了钢管结构容易发生局部屈曲的缺点.近年来,随着理论研究的深入和新施工工艺的产生,工程应用日益广泛.本文结合钢管混凝土结构的特点,对钢管混凝土在现代建筑工程中的应用情况进行了简要地分析,并指出了钢管混凝土结构的未来发展趋势.     

钢管混凝土结构的特点与应用

钢管混凝土结构是由混凝土填入钢管内而形成的一种新型组合结构.由于钢管混凝土结构能够更有效地发挥钢材和混凝土两种材料各自的优点,同时克服了钢管结构容易发生局部屈曲的缺点.近年来,随着理论研究的深入和新施工工艺的产生,工程应用日益广泛.本文结合钢管混凝土结构的特点,对钢管混凝土在现代建筑工程中的应用情况进行了简要地分析,并指出了钢管混凝土结构的未来发展趋势.     

小议钢管混凝土结构的特点与应用

钢管混凝土结构是由混凝土填入钢管内而形成的一种新型组合结构.由于钢管混凝土结构能够更有效地发挥钢材和混凝土两种材料各自的优点,同时克服了钢管结构容易发生局部屈曲的缺点.近年来,随着理论研究的深入和新施工工艺的产生,工程应用日益广泛.本文结合钢管混凝土结构的特点,对钢管混凝土在现代建筑工程中的应用情况进行了简要地分析,并指出了钢管混凝土结构的未来发展趋势.     

钢管混凝土结构在建筑工程中的应用研究

近20年来，钢管混凝土结构逐渐被应用于建筑结构尤其是在高层建筑结构中，随着建筑物高度的增加，钢管高强混凝土和钢管超高强混凝土结构的应用也将会得到快速的发展。钢管混凝土结构的特点及其在现代建筑工程中的应用情况进行了简要地分析，并指出了钢管混凝土结构的未来发展趋势。     

矩形钢管混凝土柱在轴压下的局部屈曲分析

假设核心混凝土为刚性,矩形钢管混凝土柱的钢管板件在非加载边受到弹性约束而确定出钢管壁板的局部屈曲模型。为了推导出方钢管混凝土柱在轴压下钢管管壁的局部屈曲临界应力,我们采用了能量法。通过计算能够充分表明,核心混凝土能够有效的提高钢管管壁抵抗局部屈曲的能力。     

浅谈钢管混凝土填充灌注施工技术

秋湖里大桥主桥为中承式钢管混凝土系杆拱桥,主跨钢管混凝土拱跨径为160m,拱肋为空间桁架结构,桁架由四根钢管、横向缀条、隔板和腹杆连接而成。钢管内灌注C50微膨胀混凝土,钢管混凝土采用填充灌注施工技术。文章分析了钢管混凝土填充灌注施工中选择输送泵型号规格和泵送工艺等技术。     

方钢管混凝土结构芯钢管节点的有限元分析

将一种带有芯钢管的不连通钢管混凝土节点用于方钢管混凝土结构,验证了这种节点的可行性。选择材料本构关系和破坏准则,采用通用有限元工具ANSYS,建立三维有限元模型,对芯钢管中柱节点模型的外钢管应力、芯钢管应力、混凝土应力进行了分析。数值分析表明该节点用于方钢管混凝土柱与钢筋混凝土梁的节点,具有良好的性能且受力性能与在圆钢管混凝土结构中相似。     

芯钢管混凝土节点的芯管壁厚与节点承载力关系的数值分析

对一种已经通过试验研究的钢管混凝土结构的新型节点进行数值分析。这种节点将钢管混凝土柱的钢管在节点区间断,在节点区设置芯钢管,使梁中的纵筋在节点中直通、梁与节点区混凝土成为一体可靠的传递梁中的弯矩、剪力及轴力。本文利用数值分析弥补模型试验数量少的缺陷。选择不同芯钢管壁厚的节点模型进行非线性有限元分析,得出芯钢管壁厚对节点承载力的影响规律。分析结果表明芯钢管壁厚是影响节点承载力的主要因素之一。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Incumplimiento del salario mínimo en Europa central y oriental

En este estudio se analiza el incumplimiento del salario mínimo durante el periodo 2003–2012 en diez países de Europa central y oriental con salario mínimo obligatorio nacional. A partir de los datos de EU‐SILC y la metodología propuesta por Bhorat, Kanbur y Mayet (2013), se cuantifica la incidencia y magnitud del incumplimiento. Se realizan análisis de regresión sobre determinantes individuales, laborales y macroeconómicos. Aunque la incidencia permanece relativamente baja, los trabajadores a los que se dirigen las políticas de salario mínimo parecen los más expuestos a su incumplimiento. Con el tiempo, una mayor incidencia se asocia a una razón más alta entre salario mínimo y salario medio.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Cultural Economy Planning in Creative Cities: Discourse and Practice

While a growing body of research analyses the functional mechanisms of the cultural or creative economy, there has been little attention devoted to understanding how local governments translate this work into policy. Moreover, research in this vein focuses predominately on Richard Florida's creative class thesis rather than considering the wider body of work that may influence policy. This article seeks to develop a deeper understanding of how municipalities conceptualize and plan for the cultural economy through the lens of two cities held up as model ‘creative cities’ — Austin, Texas and Toronto, Ontario. The work pays particular attention to how the cities adopt and adapt leading theories, strategies and discourses of the cultural economy. While policy documents indicate that the cities embrace the creative city model, in practice agencies tend to adapt conventional economic development strategies for cultural economy activity and appropriate the language of the creative city for multiple purposes.