基于BIM 的项目文本信息集成方法研究

建筑领域文本信息管理难度大、利用效率低,基于建筑信息模型（BIM）的文本信息集成管理可极大地提高建设项目管理的效率。在介绍BIM 的概念和数据交换标准（IFC）的基础上,提出了基于BIM 的中文文本信息集成方法:基于向量空间模型进行建筑文本分类;利用Revit API 提取模型对象的属性信息并生成查询向量,通过计算其与文本向量的相似度,检索出与模型对象相关的文本文档;利用IFC 提供的外部资源引用将文本关联到BIM 模型,实现文本信息与项目模型的集成。运用该方法从Revit 模型中提取了楼板属性信息并在楼板与文本间建立了关联关系,验证了该方法的可行性。该方法可为基于BIM 的建筑文档集成管理系统的开发提供支持。     

基于BIM 的建设项目文档管理系统设计

建筑信息模型（BIM）在建设工程领域的作用愈来愈凸显,基于BIM 的信息集成管理将极大提高项目管理的效率。充分分析了传统建设项目文档管理系统在信息检索、知识重用方面的不足,同时对BIM 以及IFC 标准进行了详尽的阐述。在此基础上提出在BIM 环境下集成建设项目文档管理系统,并分别分析了系统的实施必要性及技术可行性,提出了系统框架。最后对文本信息集成方法进行了改进,提出适用于中文文本的BIM 环境下建设项目文档管理的实现框架及其支撑技术。研究为可以基于BIM 的建设项目文档管理提供参考。     

基于BIM的医院建设全生命周期集成管理

随着信息化技术在各个行业的普及与应用,数字设计和数字建筑模拟时代已经来临。本文将信息化技术与IBM相结合,构建基于BIM的集成管理系统,从而实现医院建设项目全生命周期集成管理。在建设阶段,应用激光扫描技术实时构建三维模型,构建IFC标准的BIM数据库,实现建设阶段管理集成化;在运维阶段,利用BIM数据库,规划设备设施的有效执行计划,通过传感器实时收集运行数据,应用混合数据的挖掘方法采集有用信息,实现运营阶段管理集成化。     

BIM与GIS数据集成:IFC与CityGML建筑几何语义信息互操作技术

近年来,建筑信息模型(BIM)与地理信息系统(GIS)的集成应用越来越广泛且深入,不同专业领域通过简单模型转换实现信息交互的方法由于只保留了少量的语义信息从而导致了应用的分散和独立,局限性十分明显。IFC和CityGML分别为BIM和GIS领域内通用的数据模型标准,两者之间的几何和语义信息共享将为BIM和GIS的集成奠定基础。本文基于IFC和CityGML标准,提出IFC几何要素过滤方法以及IFC到CityGML的语义映射规则,为IFC与CityGML建筑模型的几何、语义信息互操作提供一种通用手段,并通过实例进行了验证。     

基于移动计算的BIM协同工作平台理论框架研究

综合应用计算机支持协同工作(CSCW)、IFC标准、建筑信息模型(BIM)、移动计算、异构无线网络等理论和技术,研究支持建筑工程全生命周期信息管理和协同工作,开发基于移动计算的BIM协同工作平台,提出了这一系统的理论框架,为原型系统的开发打下坚实基础。     

铁路站房建筑信息模型IFC数据扩展与验证

随着BIM技术广泛应用于铁路复杂项目的建设,为促进铁路工程全生命周期信息数据共享与交换的完整性与有效性,保证BIM数据得以有效的利用,本文在国际IFC标准的基础上提出对铁路站房建筑信息模型IFC标准的扩展方法。充分了解IFC实体间继承关系后,通过将新增实体类添加至IFC标准框架,利用转换工具获得新的实体类文件,最后在天磁BIM协同平台验证该IFC数据扩展方法的可行性。     

基于IFC标准的建筑构件入库信息管理方法

目前IFC格式构件的储存和运用不广泛,建立构件库仍依靠手工搜集与检查入库,效率与质量较低,因此需利用信息化技术快速且低成本地搜集BIM构件.提出一种基于IFC标准的构件入库信息管理方法,通过信息提取算法从已有模型的IFC文件中提取建筑构件所需信息,根据建筑信息分类原则将构件自动分类储存,实现构件信息的高效入库储存管理.     

基于IFC标准的老旧砖房变形监测信息集成与表达

BIM具有强大的可视化和信息集成功能,可以很好地应用到工程结构监测中。由于模型文件存在不兼容的问题,监测信息需要以标准化形式来表达。本文提出了基于IFC标准的BIM技术对建筑监测信息的表达方法,通过模型属性扩展等方式建立结构监测信息模型与IFC标准的数据模型之间的映射关系,并以一栋4层砖混结构为监测对象,验证了该方法的可行性。     

浅谈建筑信息技术的应用

在分析建筑业信息化现状的基础上,简述了建筑信息模型BIM和IFC标准的基本概念,BIM是一个包含了建筑所有信息的综合数据库,这个数据库管理建筑生命周期的全部信息。最后简要介绍国外软件商对BIM的应用并进一步阐述了建筑与结构设计软件间的信息共享与交换。     

基于BIM的建筑运维信息标准化交付研究

BIM技术能够促进建筑工程项目的各阶段信息集成,但目前运维阶段信息交付仍存在不少问题。本文基于BIM技术标准,利用IDM标准绘制建筑运维工作流程图,有效识别建筑运维需求信息并提取功能部件,并将IFC标准中的数据格式同需求信息进行映射,最终将信息标准化,使其能够顺利交付到运维阶段,实现BIM技术从建设开发到运维服务的全生命期应用。     

基于BIM的建筑工程项目多利益方协同机制框架研究

“信息孤岛”现象制约着建筑行业全寿命周期协同管理效率, 各参与方都不愿意主动共享信息, 往往会导致建设后期出现大量的变更。基于统一的BIM标准, 各参与方在投资、设计、施工、竣工阶段的信息严格按照统一BIM标准进行创建、传输, 可以完全解决信息流在传输过程中的失真现象。首先, 打破传统BIM狭义认识, 从广义上将其定位为一种机制, 在此机制下在IFC标准基础上提出并建立BIM标准。其次, 引入熵值表示系统有序的程度, 基于熵和信息技术建立建筑全寿命周期信息传输模型。最后, 在BIM标准和信息传输模型的基础上提出建筑全寿命周期协同框架, 为减少建设后期的变更提供可能, 为解决建筑全过程中“信息孤岛”现象提供基础。     

IFC model viewer to support nD model application

Today, building information modelling (BIM) plays a crucial role in the research and development fields of construction information integration and interoperability. This paper, from an information technology point of view, outlines the definition and aims of the “3D to nD Modelling” project, a platform grant-funded project by UK’s British Engineering and Physics Sciences Research Council (EPSRC). It presents a scenario of widening BIM implementation into the overall aspects involved in the whole life cycle of a building project. Industry foundation classes (IFC) as a standard BIM specification has been adopted as a central information repository in order to deliver the integrated building information throughout the nD-driven assessments, evaluation and decision-making. This paper also focuses on the development of an IFC-viewer, which is defined as the holistic interface of the nD modelling tool. The techniques and methods including the auxiliary tools adopted in this development are detailed. This development presents a practical and economic way to reveal and retrieve the information of IFC models inclusively, structurally and visually.     

基于IFC标准的BIM数据共享与交换

BIM技术正在全球范围内推动传统建筑行业产生重大变革。对比过去建筑项目采用分散的图纸开展工作的习惯,BIM技术运用面向对象的方法,采用相互关联的建筑对象信息,能够实现建筑工程项目的协同设计、施工和运维管理。由于建筑项目具有多专业多部门的特点,各专业分工不可避免地使用不同的BIM软件。然而,目前不同的BIM软件主要采用自身的内部数据格式,不同的数据格式导致建筑项目BIM应用过程中普遍存在数据交互效率低的问题。鉴于此,该文提出基于IFC标准的BIM数据共享与交换技术路线,并自主研发基于IFC的结构模型服务器IFC-SMS与基于IFC的BIM协同平台SJTUBIM,为解决建筑项目过程中的不可避免的数据交互问题提供一条有效的途径。最后,以上海交大日上江村项目为分析案例,验证该技术路线的可行性。     

基于BIM的大型项目群信息集成管理研究

我国建筑业发展势头强劲,大型项目群不断涌现。针对大型项目群的特点、结构与管理风险,基于BIM的研究成果,构建了主要包括项目产品、全寿命过程和管理组织等三方面的大型项目群管理信息集成模型,并对其在大型项目群管理中的作用进行了分析。     

Application and extension of the IFC standard in construction cost estimating for tendering in China

The purpose of this paper is to investigate the possibilities and methods of applying the IFC (Industry Foundation Classes) standard, i.e. the mainstream standard of BIM (Building Information Modeling) data to the construction cost estimating for tendering in China. Through analyzing the existing standards and the IFC standard, the problems of using the IFC standard are identified and the solutions are explored. An information requirement model for construction cost estimating for tendering in China was established, which includes seven aspects of information entities. Then each aspect of the information was expressed by using the IFC standard to verify the completeness of the IFC standard and to establish the IFC-based information model. As a conclusion, the IFC standard can be used to express the information for the construction cost estimating for tendering in China as a whole, but some extensions in the form of proxy elements and property sets are needed. The established information model can be applied to the development of a construction cost estimating software.     

Logic for ensuring the data exchange integrity of building information models

Industry domains require distinct data and structures of building information models developed and tailored for their disciplines. To seamlessly exchange the building information models, Industry Foundation Classes (IFC), which is one of neutral formats, has been broadly used in the architecture, engineering and construction, and facility management industries. Model view definition (MVD), which is one of the IFC sub-schemas used by domain experts and BIM software vendors, consists of IFC-mapped data exchange requirements of each domain and helps software vendors develop IFC import and export features that allow project participants share and exchange BIM model information. Because of the heterogeneous translation processes and structures of IFC interfaces according to model views, their validation is imperative to ensure the integrity of BIM data and maintain a consistent data exchange environment. To accomplish this objective, this paper suggests the new approach to evaluating BIM data in accordance with diverse requirements of MVD. Since MVD entails various types of data exchange specifications, this research study examines their embedded checking rule types and categorizes corresponding implementation scenarios. In addition, this paper involves rule logic and IfcDoc-based BIM data validation developed based on the logical rule compositions of identified rules types and checking scenarios. This approach is expected to support sharing consistent BIM data sets and confirming the quality of received data pertaining to a syntax and semantics of a targeted model view.     

Logic for ensuring the data exchange integrity of building information models

Industry domains require distinct data and structures of building information models developed and tailored for their disciplines. To seamlessly exchange the building information models, Industry Foundation Classes (IFC), which is one of neutral formats, has been broadly used the architecture, engineering and construction, and facility management industries. Model views definitions (MVD), which is one of the IFC sub-schemas used by domain experts and BIM software vendors, consists of IFC-mapped data exchange requirements of each domain and helps software vendors develop IFC import and export features that allow project participants share and exchange BIM information. Because of the heterogeneous translation processes and structures of IFC interfaces according to model views, their validation is imperative to ensure the integrity of BIM data and maintain a consistent data exchange environment. To accomplish this objective, this paper suggests a new approach to evaluating BIM data in accordance with diverse requirements of MVD. Since MVD entails various types of data exchange specifications, this research examines their embedded checking rule types and categorizes corresponding implementation scenarios. In addition, this paper involves rule logic and IfcDoc-based BIM data validation developed based on the logical rule compositions of identified rules types and checking scenarios. This approach is expected to support sharing consistent BIM data sets and confirming the quality of received data pertaining to the syntax and semantics of a targeted model view.     

IFC and building lifecycle management

This paper presents an extension of the BIM technology that allows to manage information during the entire lifecycle of an AEC project. Usually, AEC projects and facility management are dissociated. Our building information system plays a central role in the improvement of the design and the management process. The building activity generates a great number of data and information of various kinds. The management and the communication of these data by the various participants is complex. Our design and management methods use IFC files to facilitate the sharing process for a better qualification and validation of data.