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桥梁施工监控及健康监测均建立在桥梁检测技术基础上,本文在研究云计算的基础上,提出了采用了云计算作为桥梁检测的新技术,研究了云计算在桥梁监测领域的几个关键性问题,并展望了云计算在桥梁检测领域的广阔前景。 相似文献
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本文针对传统国土巡查存在的问题,提出了利用云计算技术和GPS、GIS、RS技术建设的国土巡查管理系统,详细介绍基于云计算的国土巡查管理系统的架构、功能和优势。 相似文献
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Khurram Iqbal Ahmad Khan Roger Flanagan Shu-Ling Lu 《Construction Management & Economics》2016,34(3):192-204
The increase in e-commerce, the digitisation of design data and the interchange and sharing of information have made the construction sector more reliant upon IT infrastructure and systems. The design and production process is complex, dynamic, interconnected and dependent upon greater information mobility, requiring seamless exchange of data and information in real time. Small- and medium-sized enterprises (SMEs), in particular, specialty contractors, can utilise cost-effective collaboration technologies, such as cloud computing using software as a service, to help in the effective transfer of information and data. The system dynamics (SD) approach gives a better understanding of the dynamics of complex systems. SD methodology is used as a modelling and analysis tool to understand and identify the key drivers in the absorption of cloud computing for SMEs. The aim is to determine how the use of SD can improve the management of complexity of information flow, leading to improved performance for SMEs. SD is shown to be a viable tool to manage information complexity using cloud computing for performance improvement in construction. 相似文献
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近年来,云计算在网络技术、IT技术融合发展的基础上不断优化自身技术组合,并逐渐形成一种完整的商业模式,促进了电信业及广义ICT产业的突破发展,必然地成为产业界和学术界关注的热点。而PaaS作为云计算三大服务类型之一,其代表性技术分布式并行计算是云计算完整商业模式的基本促成因素,在云计算关键技术和应用经验仍在持续完善的过程中,探讨PaaS的技术实质和其理念的应用思路,有助于电信运营企业科学掌握这一战略手段、规避风险。 相似文献
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BIM技术作为建筑业的一种新技术,具有可视化、模型化、优化型、协调性等特点,其正在成为市场的驱动力量。BIM环境下的信息互用对解决目前建筑业成本浪费和工期延误有很大的帮助。通过介绍BIM技术在建筑工程设计施工中的应用,分析BIM技术的应用现状、应用实践、应用热点等,指出了BIM随着市场化的发展,形成其特有的产业链。 相似文献
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Information and communication technology (ICT) is becoming increasingly important in construction although the rate of adoption is considered slow and the industry faces specific implementation challenges. Mainstream information systems research has shown that individuals’ beliefs and expectations of the consequences of ICT use predict subsequent usage. We describe the development of scales to measure beliefs about the consequences of building information modelling (BIM) and their use in a survey of employees of a large construction contracting organization in the United Kingdom. Scales for performance expectancy, effort expectancy, social influence, facilitating conditions, compatibility, and attitude toward using technology were adapted from existing measures. In an analysis of responses from 762 construction employees the scales showed acceptable measurement properties. Expectations about the consequences of BIM use were broadly favourable although there is a need for more data for comparisons. The structure of the responses showed that expectations that BIM would enhance job performance were strongly related to expectations that BIM use was compatible with preferred and existing ways of working. Results also suggest that social influence is complex and may be multidimensional. 相似文献
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通过分析涪陵长江大桥的工程现状,确定了该桥换索施工监控的内容,从主梁应力监控、斜拉索索力监控、主梁线形监控、主塔偏位监控四方面阐述了换索施工监控方法,并总结了一些施工技术要点,以供参考。 相似文献
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进行了大跨径预应力混凝土刚构桥腹板开裂机理研究,基于弹性力学平面问题分析方法,推导了集中荷载作用下的板件应力函数表达式,绘制了不同受压边长与集中荷载长度比(d/a)下的横向应力曲线,拟合了集中荷载作用下构件的横向应力求解函数,构造了混凝土刚构桥腹板在预应力集中荷载作用下等效压力矩形的选取方法,并基于平面应力的表达式提出了在三维情况下沿预应力轴线的横向应力计算方法。通过建立某预应力混凝土刚构桥0~3#段实体有限元模型,分析施工过程中刚构桥混凝土腹板在不同等级预应力作用下的开裂情况。结果显示:有限元裂缝模拟与实桥腹板开裂范围一致,有限元应力分析结果下限值与推导的横向应力求解函数计算结果接近,变化趋势一致,印证了横向应力函数求解方法的正确性。 相似文献
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建筑信息模型的发展及其在设计中的应用 总被引：6，自引：0，他引：6
在建筑牛命周期的三个主要阶段(设计、施工和管理),建筑信息模型BIM(Building Information Modeling)对于促进数据信息交换与共享,加快决策速度,降低项目成本和提高产品质量等方面起到了非常重要的作用.建筑设计是一个从无到有、反复修改的过程,随着超高层、超大跨度建筑以及特大跨度桥梁等大型复杂土木工程在我国的相继发展,设计者贯彻信息模型理念显得越来越重要.本文在介绍建筑信息模型相关发展的基础上,阐述了信息模型在协同设计中的作用,期待能够促进建筑信息模型在上程设计行业的运用. 相似文献
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The corrugated steel plate is a widely used structural element in many fields of application because of its favourable properties and has been applied since the 1920s. For the last 20 years it has been increasingly used in the web of steel and composite bridges. When such a bridge is incrementally launched, buckling of the thin steel web may occur. In this paper, a numerical model is developed on the basis of previous experiments. Numerical investigations are made for the determination of the patch loading resistance, and the geometric parameters which influence the patch loading resistance and the structural behaviour are determined and analysed. Existing design formulas from the literature are summarised from the point of view of bridges, and enhanced according to the numerical results and the existing and additional experiments. 相似文献
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As building information modelling (BIM) is positioned by governments and construction professionals as a solution to the problems in the construction industry, research is needed into the benefits BIM actually confers. The focus here is on the effectiveness of BIM as a medium for communicating information within a construction team. A case study of an offsite precast concrete fabrication facility was conducted. At the time of the study, the facility was supplying precast units for four public sector projects, and using four information management systems: e-mail, a construction project extranet tool, an Enterprise Resource Planning system and a new BIM-based system. The flow of information through the four media was measured and visualized as the projects progressed. This quantitative measurement of information flow was combined with qualitative data from interviews with facility staff. It was found that the introduction of the BIM-based system diverted information flow through the building model and away from the extranet system. The use of e-mail was largely unaffected. BIM allowed considerably more accurate, on-time and appropriate exchange of information. It is concluded it is possible to quantify some of the benefits of BIM to information management. This research paves the way for future research into the management of more construction project information linked more closely to building models. 相似文献
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Internet的不断发展以及空间信息在各领域的广泛应用,空间信息服务被广泛的建设和使用,然而当前的众多空间信息服务只提供相对单一的服务内容,如何将这些现有的单一空间信息服务动态有机的组合起来,实现空间信息服务的按需集成,达到为用户按需服务就成为我们亟待解决的问题。本文的主要研究内容是空间信息服务的集成的技术方法,以实践为基础,对多源空间信息服务注册管理、组合与集成等问题展开研究。 相似文献
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桥梁质量监测是近年来国内外的研究热点。本文首先介绍了桥梁结构建设质量监测的内涵和基本组成,再结合一个工程实例,具体阐述了桥梁结构质量检测的基本内容。最后回顾和总结了桥梁结构质量监测所取得成就,分析了存在的问题和难点。 相似文献
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为研究大跨变截面波形钢腹板预应力混凝土（PC）组合箱梁顶板在车轮局部荷载作用下的横向受力问题,结合2座桥例,分别建立全桥实体有限元模型;选择纵向3个典型截面,建立与之匹配和考虑有效分布宽度的平面框架模型;依据实体模型中顶板控制截面的横向应力影响线进行空间实体模型和平面框架模型的横向最不利加载,获得控制截面的最大横向拉应力及其沿纵向的变化规律,并对比了2种模型的计算结果。结果表明:对于顶板悬臂根部截面和腹板内侧截面,框架法与实体有限元法计算结果吻合良好;对于顶板跨中截面,腹板间距较大时,框架法的计算值偏于保守,设计中需对框架法的计算值进行适当折减;随着加载位置由跨中向支点移动,顶板跨中截面的横向应力峰值逐渐减小,悬臂根部截面和腹板内侧截面的横向应力峰值有增大趋势;有无横隔板对桥面板的横向受力影响很小,顶板跨中截面的横向应力值随波形钢腹板线刚度的增加线性减小。 相似文献
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鉴于新型索拱桥存在明显几何非线性的力学特点,针对已有拱轴线迭代优化方法收敛性不好的问题,提出在主拱圈为两铰拱的索拱桥有限元模型基础上,进行几何非线性的拱轴线迭代优化方法,以解决考虑几何非线性的超大跨径索拱桥拱轴线迭代的收敛性问题。以跨径600m索拱桥作为算例,验证方法的有效性及收敛性。算例结果表明,与仅考虑线性迭代相比,考虑非线性迭代后的主拱圈弯矩分布更合理,最大正弯矩小35%,最大负弯矩小17%,主拱圈应变能小23%;收敛性分析结果表明,该方法比主拱圈为无铰拱有限元模型方法收敛性能更好,不同的初始拱轴线均能收敛于稳定的结果。 相似文献
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以实际工程背景泼和大桥为实例,分析了车速、路面不平顺、桥梁结构阻尼对连续梁桥冲击系数值的影响,分析结果表明,随着车速的增加,桥梁动挠度及冲击系数值有增大趋势;路面不平顺是影响车桥耦合振动值的主要因素之一,随着路面状况的恶化,桥梁动挠度值明显增大;桥梁结构阻尼能在一定程度上减小桥梁冲击系数值。 相似文献
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Contractors throughout the construction supply chain develop and use cost information. By treating ‘cost as information’, insights are generated into how cost information is created and flows from work carried out to a client cost. A case study of a main contractor’s supply chain involved semi-structured interviews, workshops and document reviews. We considered whether contractors’ current costing practices used for the purpose of pricing and cost control could support decision-making about improvements through the supply chain. The results show that firms recognize that current costing practices do not provide a good representation of work carried out. Cost information that is useful in a narrative that seeks to improve site operations is either not created or hidden in layers of assumptions and lost as it does not cross the boundaries between organizations. This implies that the implementation of current practices of costing in building information modelling will not increase the effectiveness of modelling construction costs for the purpose of improvements. However, cost information that is useful in decision-making about improvements could be created. This could be achieved but requires a systemic change, where new representations of cost are tied to work processes used within more stable procurement relationships. 相似文献