不同交错桁架钢结构抗震性能研究

交错桁架钢结构作为一种经济、高效的钢结构体系,突显其结构内无柱特性,使结构内部获得两倍柱距的大开间,建筑内可据需灵活布置,被人们在酒店、医院等建筑所推崇。文章利用有限元分析软件SAP2000建立华伦式、帕式、混合式三种形式的交错桁架钢结构体系模型,对其分别运用反应谱和时程方法并结合用钢量作对比分析,从安全、经济合理综合考虑,得出在实际工程中宜采用交错桁架钢结构体系。     

多层钢结构大开间住宅结构设计

错列桁架大开间结构体系的基本结构组成是柱子、平面桁架和楼板。柱子沿房屋外侧周边布置,中间无柱,桁架在相邻柱列上下层交错布置,楼板端搁置在桁架的上弦,另一端则支承在相邻桁架的下弦。现主要对钢管混凝土柱、桁架及大开间楼板进行设计。     

张拉索桁架点支式玻璃幕墙的施工

点支式预应力拉索玻璃幕墙是一种新型的建筑玻璃幕墙。索桁架点支式玻璃幕墙的施工主要是预应力张拉索桁架结构体系的施工。索桁架预应力张拉施工的关键是如何处埋索。处埋索的内容包括钢索的制作与施工。与传统的刚性结构不同的是预应力索桁架结构的分桁设计、制作与施工应一体化考虑。这也就意味着在设计过程中必须考虑制作和安装过程，而制作与安装过程中，必须考虑设计的要求和规定，预应力结构中处埋索的关键体现在预应力过程当中。     

浅谈钢结构交错桁架结构体系静力性能与简化计算

近十几年来,我国钢产量有了迅速地提高。发展一种经济、实用、美观的轻型钢结构住宅符合我国社会发展的要求,对提高我国建筑技术水平和人民生活水平有着重要的意义。轻钢交错桁架结构正是适应这种需要的一种工厂化、标准化的新型结构体系,故而研究这种结构体系的受力性能和设计方法具有重要和深远的意义。     

大跨度钢管桁架结构非线性稳定性研究

某屋盖采用圆钢管拱桁架结构,单榀拱桁架两端支承于立体钢桁架上,该结构的整体稳定性是设计的重点。考虑完善及带缺陷结构两种情况,对单榀及多榀拱桁架子结构进行几何非线性稳定分析,得到了临界荷载与位移的关系曲线。分析结果表明:初始缺陷及几何非线性对该结构的稳定承载力有一定的影响,设计中应加强有关支撑来提高结构的整体稳定性。     

大跨度拉索点支式幕墙的结构分析与工程应用

本文研究的内容主要是支式幕墙衔接手法,预应力索桁架的研发,并在文中给出工程实例进行分析研究。     

架空热力管道特殊跨越桁架设计探讨

架空热力管道在遇到过河、过街等特殊跨越时经常会用到钢桁架结构。钢桁架由于质量轻、抗震性能好、可跨越的距离大,在热力管网的特殊跨越中得到广泛应用。文章通过对桁架结构的分析,提出了桁架结构设计的优化方案。     

货架钢结构系统的分析

货架钢结构系统的设计分析过程是非常复杂的。如果设计不恰当,或者会浪费材料,增加自重,提高成本,或者会因局部结构强度不够而埋下安全隐患。由于超静定桁架结构、静定桁架结构或钢架结构是货架钢结构中的主体形式,其中超静定桁架结构     

拉索拱桁架结构受力性能研究

拉索拱桁架结构是预应力钢结构的一种,其工作性能受到预应力值、撑杆数目、拉索垂度等的影响。文章从刚度、内力和变形的角度对拉索拱桁架结构进行了理论分析,通过对一榀拉索拱桁架结构运用SAP2000进行了有限元模拟,分析了各影响因素对结构的影响程度,得出了有益结论,对实际工程设计具有一定的指导意义。     

桁架节点的优化分析

文章针对大型吊车桁架结构的角节点,运用实体建模软件Solid Works建立桁架结构角节点的参数化实体模型,借助有限元分析软件ANSYS对此桁架节点进行了优化分析,得到了节点板各参数变化对节点板应力的影响,为类似工程提供参考依据。     

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.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。     

浅谈大体积混凝土裂缝的控制

大体积混凝土的裂缝问题是实际工程中长期困扰工程技术人员的问题,其控制技术的研究是混凝土结构研究的热点问题,具有重大的学术价值和潜伏的工程背景。     

Supply Chain Strategies in the UK Fashion Industry—The Rhetoric of Partnership and Realities of Power

This paper focuses on the fashion industry, one characterised by issues such as dramatic shifts in the scale and power of major retail buyers in the market, the advent of retailer own brands, and the nature of sourcing and supply chain decisions, issues that are increasingly global in nature. The aim of this research is to explore the nature of relationships between UK high street multiple fashion retailers and their contracted suppliers, many of whom are entrepreneurial firms by most definitions of the term. Four core themes emerge from the literature and provide a framework for the research, namely, power, process, partnership, and people. The research approach was qualitative, and conducted over a period of twelve months. The paper ends with an agenda for future research.