Modular and Offsite Construction (MOC) Summit Proceedings最新文献_第5页

Highly Mechanical Performance of Laminated Veneer Lumber Induced by High Voltage Electrostatic Field 高压静电场对单板复合材料高机械性能的影响

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS78

Qian He, Tianyi Zhan, Zehui Ju, H. Zhang, Lu Hong, Zhiqiang Wang, N. Brosse, Xiaoning Lu

{"title":"Highly Mechanical Performance of Laminated Veneer Lumber Induced by High Voltage Electrostatic Field","authors":"Qian He, Tianyi Zhan, Zehui Ju, H. Zhang, Lu Hong, Zhiqiang Wang, N. Brosse, Xiaoning Lu","doi":"10.29173/MOCS78","DOIUrl":"https://doi.org/10.29173/MOCS78","url":null,"abstract":"The high voltage electrostatic field (HVEF), as a novel technology, was applied in the study to obtain a highly mechanical performance of LVL (laminated veneer lumber) by increasing limiting value of shear failure strength directly affected by bonding strength. The surface property of wood, polymerization extent of PF, bonding interface of wood-to-PF and mechanical properties of LVL were investigated under the HVEF treatment. The results showed that increased free radicals and total surface energy were acquired under the HVEF treatment resulting from more polar groups (?OH, ?CHO) and ions were triggered leading to decreased contact angles identified both for Poplar and Masson specimens. The HVEF provided more reactions among wood-to-UF and more cross linking reaction of PF occurred in the treating step. The tendency of vertical density profile was more extremely steep than the control with max density increased by 24.93% and 30.24% for Poplar and Masson LVL respectively since adhesive aggregated continuously and orderly along bonding interface and permeation depth reduced to around 200 ?m, accounting for improved bonding shear strength, which eventually brought an enhancement on mechanical properties of LVL with horizon shear strength (?and?), modulus of elasticity and static bending strength significantly enhanced by 14.65%, 10.68%, 20.67% and 12.34% for Poplar LVL and that of Masson LVL enhanced by 17.30%, 13.93%, 18.55% and 12.72%. Besides, the delamination ratio was decreased by 49.57% and 58.32% respectively both for Poplar and Masson specimens.","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115210832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

An Efficiency-orientated Total Factor Productivity Measurement Model for Construction Projects 面向效率的建设项目全要素生产率测度模型

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS104

W. Zhan, W. Pan

引用次数: 0

Automatic Material Estimation by Translating BIM Data into ERP Readable Data for Panelized Residential Construction 将BIM数据转换为ERP可读数据的板式住宅自动材料估算

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS71

Meng Wang, SangJun Ahn, Youyi Zhang, Mohammed Sadiq Altaf, M. Al-Hussein, Yongsheng Ma

{"title":"Automatic Material Estimation by Translating BIM Data into ERP Readable Data for Panelized Residential Construction","authors":"Meng Wang, SangJun Ahn, Youyi Zhang, Mohammed Sadiq Altaf, M. Al-Hussein, Yongsheng Ma","doi":"10.29173/MOCS71","DOIUrl":"https://doi.org/10.29173/MOCS71","url":null,"abstract":"Offsite construction methods have been promoted and recognized globally as advanced construction techniques. Panelization, a two-dimensional form of offsite construction has brought about many benefits including lower transportation requirements and design flexibilities. In North America, the panelized construction technique has become popular particularly for wood-frame wall panels for residential construction. However, although utilizing this advanced construction method can greatly improve the working environment and productivity, the conventional mentality in construction, which overlooks the value of an automated management system to support offsite prefabrication and onsite installation, hinders its potential. An automatic material estimation system can capture all computer-aided design (CAD) data from building information modeling (BIM) files automatically and convert them into enterprise resource planning (ERP) readable data so that the ERP system can be updated for the purpose of material estimation. With the assistance of a feature-based modeling method, the proposed automatic material estimation system can save huge amounts of manual work for quantity take-off and all required CAD data can be captured by the system in a few seconds. Although highly dynamic market demands result in continual changes in design, production plan, schedule, and inventory levels, the adoption of an automatic material estimation system could account for these dynamic changes in order to maximize production. Therefore, in this paper, an automatic material estimation system is proposed in order to enhance the design and estimation process in the manufacturing environment. The proposed system is introduced and the development of supportive software is described. The proposed system is implemented as a case study in a panelized construction manufacturing facility, ACQBUILT, Inc., based in Edmonton, Alberta, Canada.","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120946115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Cyclic Behavior of a Bamboo-Steel Hybrid Moment Frame with a Novel Energy Dissipation Connection 一种新型耗能连接的竹-钢混合弯矩框架的循环性能

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS123

Zirui Huang, Huang Dongsheng, Yanhua Wang, Yan Feng

{"title":"Cyclic Behavior of a Bamboo-Steel Hybrid Moment Frame with a Novel Energy Dissipation Connection","authors":"Zirui Huang, Huang Dongsheng, Yanhua Wang, Yan Feng","doi":"10.29173/MOCS123","DOIUrl":"https://doi.org/10.29173/MOCS123","url":null,"abstract":"This paper presents a novel bamboo/wood-steel hybrid frame which uses engineered bamboo products as beams and steel as columns. The beams and columns are jointed by an innovative connection which incorporates a steel hinge and two steel brackets to carry shear force and moment from the end of beam, respectively. The bracket consists of two segments, i.e. joint segment connected to beam and the other segment, which serves as energy dissipation panel (EDP), connected to the columns via a base panel. By this way, the connection can provide sufficient initial stiffness for serviceability requirements and excellent energy dissipation capacity for seismic performances. Lateral cyclic loading tests were conducted to investigate the seismic performances of the frame. It was found that hysteresis loops of the frame with energy dissipation joints show less pinching than that of frames with dowel- or bolt-type connections; by proper designing, the damage and failure of the frame can be restricted in the EDPs of connections, whereas virtually no damage was observed in the other components of the frame; the connection can provide more than 10 % damping for the frame after the yielding of EDPs. Design method is also proposed in this paper.","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116554134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Numerical Modelling Analysis of Angle Bracket Connections Used in Cross Laminated Timber Constructions 交叉层合木结构中角支架连接的数值模拟分析

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS122

Saeed Rezvani, Lina Zhou

{"title":"Numerical Modelling Analysis of Angle Bracket Connections Used in Cross Laminated Timber Constructions","authors":"Saeed Rezvani, Lina Zhou","doi":"10.29173/MOCS122","DOIUrl":"https://doi.org/10.29173/MOCS122","url":null,"abstract":"Connections are arguably one of the most critical components controlling the structural performance and failure modes of mass timber structures. Over the last two decades, demands for stronger and energy dissipative connections have been raised with increased application of mass timber products in larger and taller buildings. This paper presents numerical analyses of novel mass timber connections used in cross laminated timber structures. The connections are developed by MyTiCon with BB Stanz- und Umformtechnik GmbH angle bracket. Despite being relatively thin, these angle brackets could show comparable load resistance with thicker ones due to the reinforced web and folded edges. The commercially available finite element software ABAQUS was used to develop three dimensional (3D) numerical models to simulate the performance of angle bracket connections under different load combinations. The modelling analysis involves two phases: (1) to determine the most efficient fastener type and setup for the angle brackets connected to CLT wall and floor panels, and (2) to evaluate the capacity of angle brackets connected to CLT wall and floor panels in various loading scenarios. The findings of this study provide an insight into the behaviour of this new angle bracket connections and will be used in the design of the experimental tests in the next phase.","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"89 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128475173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Development of a Design-Driven Parametric Mass Timber Construction System for Modular High-Rise Urban Housing 设计驱动的模块化高层城市住宅参数化大质量木结构系统的开发

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS111

O. Lang, Cindy Wilson, Clayton Blackman, Ryan Gillespie, O. Krieg, Shaique Uddin

{"title":"Development of a Design-Driven Parametric Mass Timber Construction System for Modular High-Rise Urban Housing","authors":"O. Lang, Cindy Wilson, Clayton Blackman, Ryan Gillespie, O. Krieg, Shaique Uddin","doi":"10.29173/MOCS111","DOIUrl":"https://doi.org/10.29173/MOCS111","url":null,"abstract":"This paper presents the outcome of an ongoing research and development process at Lang Wilson Practice and Architecture Culture and Intelligent City on a parametric mass timber construction system for modular mid- to high-rise urban housing that started in 2006. The system was developed to systematically address the urban housing crisis in North America, and it is currently applied in two Canadian housing projects in seismic zones with 4 and 12 storeys in an evolution from previous modular housing projects by the companies. The first part of this paper explains the holistic, design-driven and parametric approach to urban housing, and how platform-based design is critical for an adaptable, sustainable and qualitative urbanization. Criteria of livability, affordability and sustainability inform the development of a customizable and modular mass timber building system, which can adapt to grid spacing and module sizes as well as to structural requirements for up to 18 floors in seismic zones. The building system is developed to meet Passive House certification and to be fully prefabricated. Constructional innovations within the system reduce the typical redundancy of doubled-up material layers of modular construction. In the second part, the authors explain how the building system is also the result of the development of a fully parametric design tool that allows not only for the optimization of building typology, home layouts or even energy consumption, but also automatically adapts the geometry of all mass timber building elements. This high level of parametrized building information density in an early stage of the design process allows for an unprecedented collaboration of designers, architects and engineers while ensuring constructability. In the last part the authors present a case study, explaining the advantages and challenges of such a collaborative effort and explain how they successfully obtained approvals to build a 12-storey mass timber housing project.","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132935851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Developing an Analytical Solution that Mimics Simulation Modeling for Construction Planning: Earthwork Case 开发一种模拟建筑规划仿真模型的解析解:土方工程案例

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS138

Waleed Shakeel, Ming Lu

引用次数: 0

Mass Timber Modular Construction: Developments in Oregon 大规模木材模块化建筑:俄勒冈州的发展

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS97

J. Sheine, M. Donofrio, M. Gershfeld

{"title":"Mass Timber Modular Construction: Developments in Oregon","authors":"J. Sheine, M. Donofrio, M. Gershfeld","doi":"10.29173/MOCS97","DOIUrl":"https://doi.org/10.29173/MOCS97","url":null,"abstract":"With the mass timber industry taking off in 2015 in Oregon, when DR Johnson Lumber in Riddle, OR started producing CLT panels, government officials were eager to support it for its promise of economic development in rural communities and also had hopes of addressing the state’s affordable housing crisis using mass timber modular construction. While mass timber modular housing has had some success in Europe, the different construction standards and building culture in the United States make it more challenging. With few areas in Oregon in which housing is likely to be built over six stories tall or in large-scale developments, it did not seem possible that mass timber could solve the affordable housing crisis where it cannot compete in cost with standard light wood-frame construction. However, it did seem feasible that mass timber panels, which are so well-suited to customizable pre-fabrication through digital manufacturing, might be successful in an alternative building type for modular construction: classrooms. In successful models of mass timber modular classrooms in Austria and Germany, schools were built in much shorter timeframes and for 25% less cost than steel or concrete construction. The authors are now working with a modular building manufacturer in Oregon, Modern Building Systems (MBS), that produces custom-designed modular light wood-frame classrooms. While mass timber classrooms cannot compete in price with light wood-frame, particularly in single-story applications, they could be competitive for two story (or taller) schools, which are usually built using steel braced-frame and concrete block. Because MBS is 18 miles west of Freres Lumber, which is newly producing Mass Plywood Panels (MPP), and the MBS facility needs no modifications to use MPP instead of wood-frame, the authors are working with them to design an economically competitive mass timber module, with several potential clients interested in testing a prototype in 2019.","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127027576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Consequences of the BC Energy Step Code on Offsite Construction BC省能源步骤规范对非现场施工的影响

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS126

Guido Wimmers, A. Conroy

{"title":"Consequences of the BC Energy Step Code on Offsite Construction","authors":"Guido Wimmers, A. Conroy","doi":"10.29173/MOCS126","DOIUrl":"https://doi.org/10.29173/MOCS126","url":null,"abstract":"In Canada, off-site construction is still the exception rather than the norm when it comes to wood construction. In Europe’s Alpine Region or Scandinavian countries, off-site construction is standard when it comes to wood construction. This paper will focus on the reasons why Canada’s wood construction industry will shift from mainly on-site to mainly off-site construction over the next 10 to 15 years. In countries with relatively demanding requirements on energy efficiency and air tightness, off-site construction has been dominating the market for more than 20 years. British Columbia adopted the BC Energy Step Code in 2017, a roadmap defining the energy efficiency of buildings over the coming years leading up to 2032, when all new construction will be required to be Net Zero ready. It is expected that the National Building Code of Canada will also encourage higher energy performance levels in the near future. Consequently, thermally better-performing envelopes will have to be produced and rigorous air tightness levels will have to be achieved for the sustainability goals given by the province. Envelope assemblies will get thicker, bulkier and heavier to meet these requirements. In this regard, a market shift to a greater amount of off-site construction is likely to be experienced to meet these targets in a controlled environment. This study is exploring the direct and indirect connections between sustainability and energy efficiency requirements given by codes to technical and cost-efficient solutions offered by industry.","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126513255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Logistics Planning and Visualization of Modular Integrated Construction Projects Based on BIM-GIS Integration and Vehicle Routing Algorithm 基于BIM-GIS集成和车辆路径算法的模块化集成建设项目物流规划与可视化

Modular and Offsite Construction (MOC) Summit Proceedings Pub Date : 2019-05-24 DOI: 10.29173/MOCS141

Sanyuan Niu, Yezhou Yang, W. Pan

{"title":"Logistics Planning and Visualization of Modular Integrated Construction Projects Based on BIM-GIS Integration and Vehicle Routing Algorithm","authors":"Sanyuan Niu, Yezhou Yang, W. Pan","doi":"10.29173/MOCS141","DOIUrl":"https://doi.org/10.29173/MOCS141","url":null,"abstract":"Logistics planning is a critical part of developing supply chain for modular integrated construction (MiC) projects in Hong Kong where high-rise, high density and hilly landscape is the norm. It is important to minimize the total logistics and to guarantee timely delivery of modules, especially for several MiC projects being constructed during the same period. Nevertheless, there is a significant lack of studies on logistics planning, optimization and visualization for MiC projects. The aim of this paper is to establish an integrated MiC logistics planning and visualization platform, which is grounded on the integration of building information modeling (BIM), geographical information system (GIS) and vehicle routing problem (VRP) algorithm. The framework is then presented and evaluated using a case study to identify optimal logistics scenario of trailer routes to meet the installation time window of MiC projects in Hong Kong. The paper finds that the proposed platform has the ability to make optimized logistics scenario for MiC projects, and to visualize the logistics scenario in a 3-dimentional interactive environment. Future study will focus on adopting flexible control strategies and including more decision-making criteria of logistics planning in MiC projects such as road width limitation, travel speed and different module types","PeriodicalId":422911,"journal":{"name":"Modular and Offsite Construction (MOC) Summit Proceedings","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124531536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21