Vladimir Bazjanac

Vladimir Bazjanac
Stanford University | SU · Department of Civil and Environmental Engineering

Ph.D.

About

51
Publications
34,802
Reads
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1,616
Citations
Additional affiliations
September 1993 - August 2014
Lawrence Berkeley National Laboratory
Position
  • Researcher

Publications

Publications (51)
Article
Full-text available
Crowd simulation addresses algorithmic approaches to steering, navigation, perception, and behavioral models. Significant progress has been achieved in modeling interactions between agents and the environment to avoid collisions, exploit empirical local decision data, and plan efficient paths to goals. We address a relatively unexplored dimension o...
Article
Full-text available
Abstract The process of preparing building energy performance simulation (BEPS) models involves repetitive manual operations that often lead to data losses and errors. As a result, BEPS model inputs can vary widely from this time consuming, non-standardised and subjective process. This paper proposes a standardised method of information exchange be...
Article
In the Architecture, Engineering, Construction, Owners and Operators (AECOO) industry, geometry modeling of the Building Energy Modeling (BEM) project is often carried out by mechanical engineers and others who because are not versed in issues of building geometry definition and are not experts in the use of CAD software, often resulting in geometr...
Conference Paper
Full-text available
Recent demand for higher energy efficiency within the building sector has led to the use of Building Energy Performance Simulation (BEPS) tools. These powerful predictive tools enable investigation of environmental and energy performance for different design and retrofit design alternatives. However, integrating BEPS with Building Information Model...
Presentation
TGA-Kongress 2016 - Innovationen in der Raumlufttechnik, Forschung und Wissenschafton, Berlin (Germany), 14 Apr 2016 - 15 Apr 2016
Conference Paper
Value Engineering (VE), as used in building design and construction projects, aims to identify opportunities to reduce construction cost, optimize the performance of the future building, reduce future operating expenses and cost, shorten building delivery time, and possibly avoid (future) legal problems and litigation. In its current practice, VE a...
Article
Quality designs generally emerge from a conceptual design process that generates and communicates large design spaces of objectives, alternatives, impacts, and values. Parametric modeling is a popular means for generating large alternative spaces; however, it is difficult to use effectively when the other spaces are not well generated. In this stud...
Article
Full-text available
Multidisciplinary design optimization (MDO) processes that automate the workflow between a parametric product model and performance simulation engines can compress design cycle time, increase design knowledge, and yield substantive product quality and performance gains. However, the accuracy and cost-effectiveness of an MDO process is highly depend...
Article
Building managers have specific duties and certain outputs that are required of them. Without the necessary data, information, tools, and time, they are unable to adequately meet their organisational goals. Scenario modelling enables explicit and unambiguous coupling of building functions with other pivotal aspects of building operation in a method...
Article
We provide an algorithm based on graph theory to convert a three-dimensional architectural building model without defined thermal space boundaries into geometry suitable for import into a whole-building energy performance simulation engine such as EnergyPlus. Our algorithm expects input specified as an Industry Foundation Classes model, accepts a w...
Conference Paper
Full-text available
Building Information Models (BIM) are increasingly used as a central data repository from which designers transfer data from 3D CAD applications to building performance simulation (BPS) tools. For a widespread use of BIMs for this purpose, these models need to comply with a certain data quality standard. Based on a thermal viewpoint and underlying...
Article
Building energy performance is often inadequate given design goals. While different types of assessment methods exist, they either do not consider design goals and/or are not general enough to integrate new and innovative energy concepts. Furthermore, existing assessment methods focus mostly on the building and system level while ignoring more deta...
Conference Paper
Full-text available
This paper presents a Simulation Domain Model (SimModel) -a new interoperable XML-based data model for the building simulation domain. SimModel provides a consistent data model across all aspects of the building simulation process, thus preventing information loss. The model accounts for new simulation tool architectures, existing and future system...
Conference Paper
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Building energy performance is often inadequate when compared to design goals. To link design goals to actual operation one can compare measured with simulated energy performance data. Our previously developed comparison approach is the Energy Performance Comparison Methodology (EPCM), which enables the identification of performance problems based...
Conference Paper
Full-text available
Meaningful building energy performance (BEP) simulation requires the use of a large amount of data. Some of those data are readily available from reliable sources. Other data must be transformed from their original content, form and/or format. If not available at all, data are improvised. This paper discusses the possible impact of input data quali...
Article
Building energy performance (BEP) simulation is still rarely used in building design, commissioning and operations. The process is too costly and too labor intensive, and it takes too long to deliver results. Its quantitative results are not reproducible due to arbitrary decisions and assumptions made in simulation model definition, and can be trus...
Article
Full-text available
A major purpose of Building Information Models (BIM) is to serve as a comprehensive depository of data that are retrievable by multiple software applications that participate in the same AECO industry project. Data placed in a BIM by one software application are retrieved and used by other applications. Retrieved data are at times not useable by th...
Article
Full-text available
Energy simulation tools are increasingly used for analysis of energy performance of buildings and the thermal comfort of their occupants. This paper describes a selection of energy simulation engines and user interfaces that are capable of these analyses today. Specifically, it discusses the usage of these tools over different life-cycle stages. Be...
Article
A Virtual Building Environment (VBE) is a ''place'' where building industry project staffs can get help in creating Building Information Models (BIM) and in the use of virtual buildings. It consists of a group of industry software that is operated by industry experts who are also experts in the use of that software. The purpose of a VBE is to facil...
Article
Interoperable software makes it possible to seamlessly exchange data among different compliant applications. Among other benefits, this offers opportunities to increase the quality of building energy simulation through simultaneous interaction of multiple design and simulation tools, possible because of direct data exchange among them.This paper di...
Article
Full-text available
Tedious manual input of data that define a building, its systems and its expected pattern of use and operating schedules for building energy performance simulation has in the past diverted time and resources from productive simulation runs. In addition to its previously released IFCtoIDF utility that semiautomates the import of building geometry, t...
Article
The Industry Foundation Classes (IFC) model of the International Alliance for Interoperability (IAI)-an object data model of buildings-is in its seventh year of development. The last three releases of the model (IFC 1.5.1, 2.0 and 2x) have been implemented by a number of ''mission critical'' industry applications. The deployment of such software in...
Article
Full-text available
This study focuses on advanced building facades that use daylighting, sun control, ventilation systems, and dynamic systems. A quick perusal of the leading architectural magazines, or a discussion in most architectural firms today will eventually lead to mention of some of the innovative new buildings that are being constructed with all-glass facad...
Article
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Building geometry is essential to any simulation of building performance. This paper examines the importing of building geometry into simulation of energy performance from the users' point of view. It lists performance requirements for graphic user interfaces that input building geometry, and discusses the basic options in moving from two- to three...
Conference Paper
Full-text available
Interoperability among software tools that are used in building design can make the use of building energy simulation tools more frequent and more effective. Industry Foundation Classes (IFC) are an object- oriented data model of buildings that provides an environment for such interoperability. This paper reports on a "live" demonstration of the us...
Conference Paper
Full-text available
Industry Foundation Classes (IFC) provide an environment of interoperability among IFC-compliant software applications in the architecture, engineering, construction, and facilities management (AEC/FM) industry. They allow building simulation software to automatically acquire building geometry and other building data from project models created wit...
Article
The daylighting performance of the Pacific Museum of Flight in Seattle, WA, has been analyzed using the DOE-2.1C building energy simulation program. The main exhibit areas of this museum are enclosed on three sides by glass walls and the 48,000-ft² roof is completely glazed. Because of the large glass areas, a detailed thermal simulation of the bu...
Article
The title of this text immediately reveals who it is written for: architects who are interested in computer applications. The author is assuming that the general reader in the field of architecture has absolutely no background in the field of computing and the text is therefore written on a very low level of sophistication, at which the simplicity...
Article
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Building information modeling (BIM) offers multiple tangible benefits to the construction segment of the AECO industry. It offers easier use of interoperable industry software tools, fewer errors and omission, and time and cost savings that can cumulatively result in earlier building delivery. It can facilitate discussion, checking, analysis and co...
Article
Full-text available
Interoperable software makes it possible to seamlessly exchange data among different compliant applications. Seamless data exchange substantially saves time and resources that makes the use of energy software feasible in industry projects where it normally is not used. Software interoperability offers another important benefit: opportunity to incre...
Article
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The introduction of EU directives 2002/91/EC and 2003/87/EC both prompt a reduction in energy consumption from European buildings. Buildings account for 50% of European energy use. Traditional prescriptive based approaches to building energy performance have not yielded desired energy savings. In addition, energy consumption is seldom compared with...
Article
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The U.S. National Institute for Building Sciences (NIBS) started the development of the National Building Information Model Standard (NBIMS). Its goal is to define standard sets of data required to describe any given building in necessary detail so that any given AECO industry discipline application can find needed data at any point in the building...
Article
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Building performance assessment for the operational phase of a building's life cycle is heuristic, typically working from available historical metered data and focusing on bulk energy assessment. Building Management Systems are used in the operational phase of the building to control the building's internal environment according to the design crite...
Article
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Minimizing building life cycle energy consumption is becoming of paramount importance. Performance metrics tracking offers a clear and concise manner of relating design intent in a quantitative form. A methodology is discussed for storage and utilization of these performance metrics through an Industry Foundation Classes (IFC) instantiated Building...
Article
Full-text available
Traditionally building simulation models are used at the design phase of a building project. These models are used to optimize various design alternatives, reduce energy consumption and cost. Building performance assessment for the operational phase of a buildings life cycle is sporadic, typically working from historical metered data and focusing o...
Article
Full-text available
The Industry Foundation Classes (IFC) object data model of buildings is being developed by the International Alliance for Interoperability (IAI). The aim is to support data sharing and exchange in the building and construction industry across the life-cycle of a building. This paper describes a number of aspects of a major extension of the HVAC par...
Article
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Data definitions that represent a given building conform to the internal data structure of the CAD software that is used to define the building. They include data which facilitate the representation of the building in CAD, but do not necessarily by themselves define any other pertinent information about the building. CAD representations of building...
Article
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Computing and the use of digital computers are inseparable from the existence of quantitative models which represent the problem in question. The understanding and the representation of the problem depends on the analyst's Weltanschauung. The most significant difficulties encountered in computing in architecture are those of thinking and understand...

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