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高层建筑的柱子混凝土强度等级一般比梁板混凝土强度等级高,文章分析不同情况应采取的不同处理措施,保证了梁柱节点核芯区的承载力。 相似文献
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无论是已建工程的加固、修补还是工程新建中经常遇到在已硬化的混凝土上或已凿除劣化、酥松部分露出坚实的混凝土基层上浇筑新混凝土或砂浆的问题,象梁、板、柱的加大截面加固、水工结构中老的坝体加高、剪力墙施工缝、叠合梁的旌工等等,涉及到新旧混凝土能否结合为整体共同工作,特别是构件中承受很大剪力和拉力部位的加固。新旧混凝土的结合面是一个薄弱环节,其界面粘结强度一般都低于整浇混凝土的强度,极大地影响了结构的可靠性。 相似文献
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陈玉江 《中国高新技术企业评价》2007,(4):164-164
在高层建筑现浇钢筋混凝土结构中,存在柱混凝土设计强度高于同一层梁板的设计强度这种情况。结点区梁、柱混凝土强度等级相差不同时,施工方法有所不同。梁柱节点不同混凝土强度等级如果按先柱后梁的次序浇捣,在楼层梁柱节点处高低强度等级混凝土交界面附近会出现细微裂缝,笔者对控制和消除这类裂缝作了些探讨。 相似文献
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无论是已建工程的加固、修补还是工程新建中经常遇到在已硬化的混凝土上或已凿除劣化、酥松部分露出坚实的混凝土基层上浇筑新混凝土或砂浆的问题,象梁、板、柱的加大截面加固、水工结构中老的坝体加高、剪力墙施工缝、叠合梁的施工等等,涉及到新旧混凝土能否结合为整体共同工作,特别是构件中承受很大剪力和拉力部位的加固.新旧混凝土的结合面是一个薄弱环节,其界面粘结强度一般都低于整浇混凝土的强度,极大地影响了结构的可靠性. 相似文献
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一、不同等级混凝土邻接面的留设在钢筋混凝土结构中,高层建筑框架结构的梁柱节点比较复杂,由于荷载组合及内力计算的结果,要求同一层的竖向结构(柱、墙)混凝土强度等级高于水平结构(梁、板)的混凝土强度等级。钢筋混凝土框架结构,水平施工缝通常留于柱脚,柱项若要留水平施工缝则应留于梁底。若同层的竖向构件和水平构件的混凝土同时浇捣,则柱顶不留施工缝。 相似文献
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高层建筑的柱子混凝土强度等级一般比梁板混凝土强度等级高,文章分析不阿情况应采取的不同处理措施,保证了梁柱节点核芯区的承裁力. 相似文献
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现代房屋建筑大多以采用钢筋混凝土框架结构体系的占绝大多数,其承载能力除受设计因素影响外,还与施工质量密切相关。特别是为了提高房屋抵御地震、台风等水平荷载的能力,在设计中除了计算应考虑的因素外,还有许多构造措施,它们对水平承载力的影响甚至比计算还重要。针对梁拄节点箍筋施工、钢筋混凝土强度等级、保护层厚度等方面的常见问题,对钢筋混凝土框架结构施工方法提出改进意见。 相似文献
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Tim Power 《Revue internationale de statistique》2003,71(1):59-67
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. 相似文献
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. 相似文献
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Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis 下载免费PDF全文
Christopher Niedt Brett Christophers 《International journal of urban and regional research》2016,40(6):1094-1111
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. 相似文献
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Christian Busch 《Journal of Management Studies》2024,61(3):1110-1151
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. 相似文献
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Mohammad Mohabbat Khan 《Public Management Review》2013,15(2):267-278
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. 相似文献
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Chris Rowley John Benson Malcolm Warner 《International Journal of Human Resource Management》2013,24(4-5):917-933
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. 相似文献
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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. 相似文献
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Kazuhiko Nishimura 《Economic Systems Research》2002,14(1):89-94
We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure. 相似文献
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John Pullinger 《Revue internationale de statistique》1997,65(3):291-308
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. 相似文献
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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. 相似文献
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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。 相似文献