基于BIM5D技术施工阶段成本控制模型构建

基于先进的BIM5D技术,结合挣值法,深刻挖掘BIM5D技术在成本控制中的潜在优势,系统性地分析成本控制模型的系统实施流程,并通过北京某信息大厦成本控制过程论证了基于BIM5D技术施工阶段成本控制模型构建的可行性。     

基于Google earth和BIM的线路设计和外业调查新方法

成塔系列软件是基于Google earth COM API接口和BIM,结合卫星、手机、GPS而开发的地理信息系统软件,旨在扩展Google earth的应用,实现Google earth上直接进行线路设计、高程提取,SRTM DEM下载,CAD等高线绘制,地球影像截图,地形断面生成, AutoCAD、KML(KMZ)、GPS和Excel文件导入导出地球,坐标纠正,地图叠加等功能,提高工作效率。     

A sliding window technique for interactive high-performance computing scenarios

Interactive high-performance computing is doubtlessly beneficial for many computational science and engineering applications whenever simulation results should be visually processed in real time, i.e. during the computation process. Nevertheless, interactive HPC entails a lot of new challenges that have to be solved – one of them addressing the fast and efficient data transfer between a simulation back end and visualisation front end, as several gigabytes of data per second are nothing unusual for a simulation running on some (hundred) thousand cores. Here, a new approach based on a sliding window technique is introduced that copes with any bandwidth limitations and allows users to study both large and small scale effects of the simulation results in an interactive fashion.     

BIM perspective definition metadata for interworking facility management data

The purpose of this research is to suggest and develop a building information modeling (BIM) database based on BIM perspective definition metadata for connecting external facility management (FM) and BIM data, which considers variability and expandability from the user’s perspective. The BIM-based FM system must be able to support different use cases per user role and effectively extract information required by the use cases from various heterogeneous data sources. If the FM system’s user perspective becomes structurally fixed when developing the system, the lack of expandability can cause problems for maintenance and reusability. BIM perspective definition (BPD) metadata helps increase expandability and system reusability because it supports system variability, which allows adding or changing the user perspective even after the system has been developed. The information to be dealt with differs according to the user’s role, which also means that the data model, data conversion rules, and expression methods change per perspective. The perspective should be able to extract only the user-requested data from the heterogeneous system’s data source and format it in the style demanded by the user. In order to solve such issues, we analyzed the practice of FM and the benefits of using BIM-based FM, and we proposed a BPD that supports data extraction and conversion and created a prototype.     

Role-based access to facilities lifecycle information on RFID tags

Radio Frequency Identification (RFID) based systems have been used in different applications in the Architecture, Engineering, Construction, Owner and Operator (AECOO) industry. Applications are mainly designed for specific lifecycle stage of the facility and serve the needs of only one of the stakeholders. This would increase the cost and the labor for adding and removing tags and eliminate the chance of using shared resources. In this paper, the usage of tags permanently attached to components is proposed where the memory of the tags is used during the lifecycle by different stakeholders for data storage and handover. A Building Information Model (BIM) database is used for tackling the interoperability issues allowing different users to access and share the data. To securely and efficiently store data on RFID tags in ifcXML format, multi-level encryption together with role-based access control is applied on the data stored on RFID tags. Each user is assigned a certain role and can only access the part of data for which he has authorization according to a predefined role and the Access Control Policy. To explore the technical feasibility of the proposed approach, a case study considering both facilities management and emergency management has been implemented and tested at Concordia University.     

Dimensional reduction of 3D building models using graph theory and its application in building energy simulation

Since the various people involved in the design process for a building project tend to hold conflicting views, this inevitably leads to a range of disparate models for planning and calculation purposes. In order to interpret the relevant geometrical, topological and semantical data for any given building model, we identify a structural component graph, a graph of room faces, a room graph and a relational object graph as aids and explain algorithms to derive these relations. We start with a building model by transferring its geometrical, topological and semantical data into a volume model, decomposing the latter into a so-called connection model and then extracting all air volume bodies and hulls of the model by means of further decomposition into elementary cyclic connection components. The technique is demonstrated within the scope of building energy simulation by deriving both a dimensionally reduced object model required for setting up a thermal multizone model and a geometrical model for defining single or multiple computational fluid dynamic domains in a building together with incidence matrices correlating these models. The algorithm is basically applicable to any building energy simulation tool.

养老地产混合式运营模式研究

随着我国老年人口数量的不断上升,中国老人的养老问题收到了地产界的关注,纷纷投入其中,养老地产应运而生.本文以借鉴国外的养老地产运营模式为切入口,提出中国养老需结合本国国情采取混合式运营模式.     

基于IFAHP的BIM管线碰撞优化模型

针对BIM管线碰撞技术尚不能根据碰撞位置给出管线的优化方案问题,利用直觉模糊层次分析法(IFAHP)建立了一种BIM管线碰撞优化模型。首先,依据建筑管线施工规范,从施工成本、施工难度、施工安全性和施工美观度四个方面建立了管线碰撞评价指标体系;其次,根据碰撞点位置状况,依据IFAHP构造出不同的直觉模糊判断矩阵,建立相应的直觉模糊决策模型,进而给出不同管线碰撞点的管线优化方案。最后,通过实例验证了该BIM管线碰撞优化模型的有效性和可行性。     

应用BIM技术的建筑精益设计初探

近年来,建筑行业的快速转型以及BIM技术的迅速发展,为建筑精益设计提供了机会。该文结合实际项目,以异形复杂形体建筑设计为研究载体,参考精益制造相关理论,探索BIM技术在建筑精细化设计中的应用,通过相对较为先进的三维设计技术,使大量二维设计方式不便完成的工作得以更有效率地完成,获得对项目质量和成本的更好把控;结合BIM设计的技术优势,优化建筑设计的工作流程,以及各专业协同设计的具体配合方法;基于BIM技术在建筑设计阶段中的应用,进行问题分析与策略研究。探索BIM技术与建筑精细化设计的有机结合,为建筑设计发展提出新思路。     

超大直径太阳定位热力系统的施工应用

采用BIM技术模拟安装,改进施工工艺,钢梁提前预制等多种技术措施,解决安装精度要求高,高空环境复杂,多专业交叉的施工难题。将超大直径(88m直径)太阳定位热力系统安装在高空屋面上,实现太阳能集采系统对于太阳方位角进行360°全面跟踪,工程应用在国内尚属首例,可为其他相关工程提供借鉴与参考。