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1.A Cross-disciplinary Approach to BIM-based Facade Design for Wind Performance

Author:Kwong, CY;Herr, CM;Kreaikas, T

Source:INTERNATIONAL CONFERENCE: ARCHITECTURE ACROSS BOUNDARIES,2019,Vol.

Abstract:This paper examines a cross-disciplinary approach to a high-rise facade design proposal for Hong Kong where the initial architectural design concept provides a negotiable boundary for an architectural engineering design process. A crucial aspect of this process is the consideration of high wind loads on the facade, as they frequently occur in Hong Kong due to regularly occurring typhoons. Design for wind performance is typically outside of the expertise of architectural designers and thus requires close collaboration between architects and structural engineers. Conventionally trained structural engineers may however not be accustomed to work with unusual building form or to consider architectural design ideas as part of engineering proposals. In the context of this paper, building information modeling (BIM) is used to facilitate cross-disciplinary dialogue as well as interdisciplinary workflows during the early design stages.

2.Comparative Study On The Ethical Perceptions Of Contractors And Designers In The China Construction Industry

Author:Kang, BG;Long, KW;Zhang, C;Hao, JL

Source:INTERNATIONAL CONFERENCE ON ARCHITECTURE AND CIVIL ENGINEERING (ICACE 2017),2018,Vol.291

Abstract:Ethics is becoming one of the most important requirements for successful business in the 21st century. The construction industry cannot be exceptional from this trend. However construction ethics management requires different approaches from other industries, as the products of the industry are construction projects which are completely different from mass production. Contractors and designers are two major participants in construction projects. The roles and responsibilities of these two project stakeholders decisively influence all aspects of construction project. Practically ethical perceptions of contractors and designers are one of main aspects to be considered for the effective and efficient management of ethics for the construction industry. This research has investigated the ethical perceptions of contractors and designers in the China construction industry. A questionnaire survey which contains 15 ethical issues and 6 demographic factors has been conducted. 170 construction professionals from construction companies and consulting companies have been participated in this survey. These 15 ethical issues are ranked in terms of seriousness, frequency and importance for both contractors and designers as a single group to understand the overall perceptions in the industry. The analysis has also been conducted for contractors and designers respectively to make comparisons between them. The top three serious ethical issues in the industry are 'Bribery and corruption', 'Failure to practice whistle-blowing' and 'Improper bidding practices'. Contractors and designers showed similar outcomes for the top five important ethical issues. But for the middle ranged ethical issues, they showed some differences. Further researches are required to identify the causes of the similarity and differences.

3.Flexural test of Tee steel PEC beam

Author:Zhao, BC;Chen, XD;Liu, S;Xia, J

Source:SUSTAINABLE BUILDINGS AND STRUCTURES,2016,Vol.

Abstract:To investigate vertical load-bearing capacity of Tee steel PEC beams, test results of two simply supported Tee steel PEC beams under vertical loads are presented. The procedure and method of test was introduced. The carrying capacity and failure mechanism, deformation capacity, mid-span sectional strain distributions were analyzed. The result indicates that the Tee steel PEC beam has good carrying capacity and deformation ability under vertical loads. Tee steel PEC beam specimens with full shear connection exhibit cross sectional strains that meets the flat section assumption. To avoid brittle failure of Tee steel PEC beams, the composite beam should have a larger steel ratio. It is rational that the plastic neutral axis is located in the flange of the concrete plate. Specimens with higher steel ratios have a higher bending strength and stiffness.

4.Hysteretic behavior study of Y-Eccentrically Braced Frames with end-plate connected replaceable links

Author:Shi, FM;Zhao, BC;Tang, C;Xia, J

Source:SUSTAINABLE BUILDINGS AND STRUCTURES,2016,Vol.

Abstract:In order to investigate the hysteretic behaviors of Y-eccentrically braced steel frames with end-plate connected replaceable links, fourteen specimens of three series have been designed, concerning the arrangement of bolts, the number of bolts, the diameter of bolts, the thickness of end-plate of the link and the thickness of beam flange. The finite element software ABAQUS is adopted to simulate the hysteretic behavior of these series of specimens so as to analyze the effect of the relevant design parameters on the performance of hysteretic behavior, bearing capacity, lateral stiffness and the energy-dissipation capacity of Y-eccentrically braced steel frames in this paper. The results indicate that the behavior of Y-eccentrically braced steel frames with end-plate connected replaceable shear links is less affected by the connection. Only if the connections are so weak that joints fail earlier than the link will the behavior of the frame suffer a lot from the effect. In addition, the connection construction exerts a significant effect on the replaceable behavior of the link.

5.OPTIMIZATION OF WINDOW-WALL-RATIO USING BIM-BASED ENERGY SIMULATION

Author:Zhang, C;Ong, LJ

Source:PROCEEDINGS OF THE 22ND INTERNATIONAL CONFERENCE ON COMPUTER-AIDED ARCHITECTURAL DESIGN RESEARCH IN ASIA (CAADRIA 2017): PROTOCOLS, FLOWS AND GLITCHES,2017,Vol.

Abstract:In this research, sensitivity analysis is applied to investigate the impact from U-values of walls, U-value of windows, and the window-to-wall ratio. The purpose is to find the co-relationship between those parameters with the building energy performance, including embedded energy in materials and operational energy during the lifecycle. Building Information Modeling (BIM) is used as a platform to obtain the material quantities and carry on energy simulation. A case study is applied for a manufactory plant in Suzhou, China. By applying both local sensitivity analysis and global sensitivity analysis, it is found that thermal properties of walls have insignificant impact on Operational Energy to Embodied Energy (OE-EE) relationship of Window-Wall-Ratio (WWR) whereas changing thermal properties of windows affects the OE-EE relationship behaviour of WWR. Lowering U-value of windows brings positive impact to the OE-EE relationship of WWR, and vice versa. Therefore, suggestions are made as reducing/increasing U-value of windows while increasing/decreasing the WWR of building.

6.Building energy management based on occupant location

Author:Pazhoohesh, M;Zhang, C

Source:SUSTAINABLE BUILDINGS AND STRUCTURES,2016,Vol.

Abstract:Reducing building energy consumption has received growing attention in the recent decades. The primary energy consumption in buildings is related to heating, ventilation, cooling, and lighting systems. A well-design control system may result in a significant reduction of energy usage. This paper presents and implements three strategies to control and analyze energy consumption in buildings. The schedule, real-time monitoring and a multi-agent system are compared with the baseline energy consumption in a university office. Devices and human agents are introduced to investigate the real-time trend in energy usage and to optimize the consumption of energy, based on the location of occupants. Initial results demonstrate potential energy saving of 16%% in the office.

7.Current state of information exchange between the two most popular BIM software: Revit and Tekla

Author:Nizam, RS;Zhang, C

Source:SUSTAINABLE BUILDINGS AND STRUCTURES,2016,Vol.

Abstract:Information exchange between domain-specific software products is essential for capturing the life cycle information of a building from its inception to operation. To collect all specialized information within a single model requires a platform that is acceptable to all different software tools. Many researchers have suggested that this objective can be approached by using vendor-neutral and open building information models such as the Industry Foundation Classes (IFC) to capture and exchange data. To analyze the effectiveness of the IFC model, this paper presents a data exchange analysis between two of the most popular BIM software to date: Revit and Tekla. Models are exchanged in the two software using IFC and a comparison is made in terms of data loss and misrepresentation. Revit seems to process IFC data easily however minor changes are noticed during the exchange. Tekla needs conversion procedures before IFC data can be processed. The architectural features of the model are found to be seriously misrepresented in Tekla.

8.Dynamical analysis of a substation structure under short-circuit current loadings

Author:Gong, G;Jiang, W

Source:SUSTAINABLE BUILDINGS AND STRUCTURES,2016,Vol.

Abstract:The past several decades have seen a rapid increase of open-air substations to satisfy energy demands, which is partly contributed by up-to-date knowledge and development on short-circuit mechanical effects in substations from a structural engineering viewpoint. Substation structures with flexible conductors are complex, and nonlinear dynamics analysis is required. In this paper, ADINA will be used for such purposes with considerations of geometry nonlinear behaviour of conductor cables under short-circuit loadings. Focus is placed on the investigations of effects of droppers and spacers, together with pinch effects for twin conductors considering the contact nonlinearity.

9.Compressive and flexural strength of Ultra-High Performance Fibre Reinforced Concrete containing recycled rubber crumb

Author:Wang, X;Xia, J;Li, Y

Source:SUSTAINABLE BUILDINGS AND STRUCTURES,2016,Vol.

Abstract:Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) has excellent mechanical properties and good durability. However, the embodied energy of UHPFRC is much higher than that of ordinary concrete due to the high usage of cement. In order to reduce the adverse environmental impact of utilizing UHPFRC, recycled rubber crumb is used as an additional component or as a replacement for fine aggregates. Cube specimens with two different mix design schemes were investigated during this study. The reduction of compressive strength was investigated. UHPFRC prisms were also cast and loaded in four point bending tests to check the reduction of flexural strength. The mixing procedure and temperature variation during the casting process was recorded. Some cube specimens were heat cured in hot water at 90 degree Celsius for forty-eight hours. Those cubes were tested following curing at around 7 days to obtain the early age strength, while other cubes are normally cured in water at around 20 degree Celsius with the prisms until 28 days.

10.ROBOTIC SIMULATION OF TEXTILE AS CONCRETE REINFORCEMENT AND FORMWORK

Author:Lu, X;Dounas, T;Spaeth, B;Bissoonauth, C;Galobardes, I

Source:PROCEEDINGS OF THE 22ND INTERNATIONAL CONFERENCE ON COMPUTER-AIDED ARCHITECTURAL DESIGN RESEARCH IN ASIA (CAADRIA 2017): PROTOCOLS, FLOWS AND GLITCHES,2017,Vol.

Abstract:New possibilities of concrete constructions in architecture, the traditional formwork can be gradually replaced by the use of flexible textile. At the same time textile reinforcement combined with fabric formwork, introduces an innovative integrated solution in the fabrication of concrete. Based on a simple understanding of the textile weaving and knitting techniques, this project concentrates on the architectural production and the structural optimization of the textile as both concrete reinforcement and formwork. Furthermore, we present a robotic simulation of the process that develops using a series of computational experiments to research the sequence of weaving and/or knitting. Through the computational process and the design simulations, the research is firmly rooted in analog and digital exploration of material and its implementation in architecture, with particular emphasis on the convergence of robotics and computation. Note that the paper deals mainly with the software and weaving simulation as part of a larger research project, without dealing with the production of physical artefacts.

11.Investigating thermal comfort and occupants position impacts on building sustainability using CFD and BIM

Author:Pazhoohesh, M;Shahmir, R;Zhang, C

Source:LIVING AND LEARNING: RESEARCH FOR A BETTER BUILT ENVIRONMENT,2015,Vol.

Abstract:Increasingly expensive and polluting sources of energy dictate the need of energy conservation in the society. The major energy consumption contribution in the operation phase of modern buildings is from their HVAC systems. Well planned HVAC systems may provide healthy and comfortable indoor environment, while poor design may result in wastage of energy. Traditionally the design of the systems is based on a constant number of occupants while the situational awareness of the system has been ignored. This paper focuses on the intelligence of the HVAC system in terms of its knowledge of the occupants of the facility in real time. Thermal comfort analysis is applied to study the indoor climate of buildings for efficient use of such HVAC systems. Computational Fluid Dynamics (CFD) is used to model and simulate the indoor conditions. Building Information Modelling (BIM) is used to be a platform to integrate all the data and apply spatial analysis and Green building standards are embedded in the BIM model to evaluate the building sustainability. Based on the results, more reasonable allocation of individual's location in a room can be provided and an automatic control of lighting, air conditioning can be suggested to optimize energy consumption based on matching occupants' comfort level.
Total 11 results found
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