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检索条件"丛书名=Lecture Notes in Civil Engineering"

共 6967 条记录，以下是521-530 订阅

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Application of Thermochromic and Self-cleaning Materials in Buildings: A Bibliometric Analysis 9th

Application of Thermochromic and Self-cleaning Materials in ...

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9th International Building Physics Conference

作者： Hidalgo-Araujo, Ana Carolina Salomao, Rafael Dornelles, Kelen Almeida Univ Sao Paulo Inst Architecture & Urbanism Sao Carlos Brazil Sao Carlos Sch Engn Dept Mat Engn USP Sao Carlos Brazil

ISBN: (纸本)9789819783076;9789819783052;9789819783045

Climate change and global warming increasingly require artificial climate control to alleviate thermal discomfort in buildings. Reflective materials, while effective for passive cooling in hot climates, degrade over time due to particle deposition and microbial growth, and can be less effective in climates with wide temperature swings, resulting in a greater need for artificial cooling. Thermochromic and self-cleaning materials are promising alternatives. The former adjusts reflectance with temperature changes, whereas the latter provide superhydrophobic surfaces and can degrade organic compounds, potentially extending the life of the building envelope. This paper analyzed recent advances and shortcomings in the use of such materials in buildings. A bibliometric analysis of 123 articles showed that most were published in 2022 (24.39%), predominantly from China (52.99%). Although their focus was primarily on translucent building envelopes (85.33%), application to opaque surfaces such as roofs (9.33%) and walls (5.33%) remained limited. Despite the growing interest, there were significant research gaps in the application of these materials to opaque surfaces, particularly roofs, which contribute significantly to heat gain in low-rise buildings in hot climates and are more exposed to natural degradation than other building surfaces.

关键词： Adaptative Building Self-cleaning Materials Energy saving

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Influence of Geosynthetic Encasement Stiffness on the Deformation Behavior of Geosynthetic Encased Stone Columns Composite Foundation Under Dynamic Loading 5th

Influence of Geosynthetic Encasement Stiffness on the Deform...

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5th International Conference on Transportation Geotechnics

作者： Ji, Mingchang Li, Fuxiu Zheng, Yewei Wuhan Univ Sch Civil Engn Wuhan 430072 Peoples R China

ISBN: (纸本)9789819782437;9789819782413;9789819782406

This paper details an experimental investigation involving shaking table tests on two composite foundations consisting of geosynthetic encased stone columns (GESC) with varying levels of geosynthetic encasement stiffness. The main objective is to examine the effect of the stiffness of geosynthetic encasement on the deformation behavior of the foundation models subjected to dynamic loading. The scaled-down foundation models were scaled in accordance with the similitude principles considering model size, stiffness of geosynthetic encasement, and input motions. The construction of the foundation models involved the use of gravel, sand, and geotextile reinforcement, and subsequently subjected to a sequence of sinusoidal excitations with rising amplitude. Results indicate the cumulative column settlements and soil settlements of the two foundation models increase notably as the input acceleration rises. The model with high stiffness of geosynthetic encasement has smaller settlements under the identical input motions in comparison to the model with low stiffness of geosynthetic encasement and has better seismic behavior in terms of settlement. In summary, with an increase in the stiffness of geosynthetic encasement, the deformation behavior of GESC composite foundation under dynamic loading is effectively improved.

关键词： Shaking table tests Geosynthetic encasement stiffness Deformation behavior Geosynthetic encased stone columns Dynamic loading

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Automated Assessment of Historic Tiles Degradation by Deep Learning Approach and HBIM Implementation: Application Cases in Seville 5th

Automated Assessment of Historic Tiles Degradation by Deep L...

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5th International Conference on Protection of Historical Constructions-PROHITECH

作者： Giannuzzi, Valeria Nieto-Julian, Enrique Marin-Garcia, David Polytech Bari I-70126 Bari Italy Univ Seville Dept Expres Graf & Ingn Edificac Grp TEP97 Innovac Tecnol Sistemas Modelado Diag E Seville 41012 Spain

ISBN: (纸本)9783031873140;9783031873126;9783031873119

Recent advances in digital technologies and automated analysis techniques applied to historic buildings have shown significant benefits in efficiently collecting and interpreting data for conservation activities. Close-range photogrammetry has become a valuable tool for detecting damage in historic buildings due to its non-invasive nature, which allows for the identification of issues while preserving the building's structure. In particular, detecting and measuring damage on historic tiled surfaces is essential for the maintenance and protection of these buildings. However, current visual inspection methods are time-consuming and labor-intensive. This study proposes an automated inspection system that uses a trained and validated convolutional neural network for classifying degradation phenomena based on images acquired through photogrammetric surveys. The detection, segmentation, and quantification strategy for degradation phenomena relies on deep learning techniques to automatically detect and measure damage affecting historic tiles. Additionally, the Historic Building Information Model (HBIM) serves as an information repository by including semantic and graphical components for comprehensive documentation management in cultural heritage conservation and restoration field. The results highlight the potential of these techniques for detecting heritage damage, supporting decision-makers in planning recovery and maintenance interventions.

关键词： Historic Tiles Decay Degradation Assessment HBIM Cultural Heritage Deep-Learning

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The Innovation Imagined for the Window: International Patents in Comparison 11th

The Innovation Imagined for the Window: International Patent...

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11th International Conference of Ar.Tec.

作者： Cernaro, Alessandra Minutoli, Fabio Univ Messina Dept Engn I-98158 Messina Italy

ISBN: (纸本)9783031718694;9783031718670;9783031718663

The window is an element of the building system that has always been a field of stylistic and technological experimentation. By virtue of belonging to the envelope, it assumes a non-secondary role in the formal composition of facades and affects levels of thermal, luminous, and acoustic comfort. Recently, the aim of environmental sustainability has encouraged the offer of more efficient solutions, also responding to the circular economy, for example by providing for the use of recycled materials. To intercept both the direction taken by the research sector and the direction that industrial production may take, the purpose of the study was to understand what the innovative features of the window will be in the near future;this was done by analysing published patent applications. The methodological approach required prior investigation of patent types and of the territorial extension of their protection. In order to detect current trends on a global scale, interest was directed to international patent applications (PCT - Patent Cooperation Treaty), which allow for the possible protection of the invention in the 157 Treaty countries and which are published in the PATENTSCOPE database of WIPO. In 2023, the chosen year of observation, 195 patent applications were published in the "window" category and 132 were included in the study, selected according to previously defined inclusion and exclusion criteria. The classification was based on the sub-systems identified within the window element (Attachment to the structure;Frame, Sash;Glazing;Screen;Movement and maneuvering;Gasket) and categorised into three innovation areas (A1. Design, A2. Performance, A3. Sustainability), and related sub-areas. The study showed that the area of Sustainability is still lacking;while greater interest on the part of the researchers concerned the area of Performance, and in particular thermal/luminous comfort, with a significant focus on the integration of the smart component in windows.

关键词： Window Patents Design Innovation Performance Innovation Sustainable Innovation

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Physical Modeling of a Water Intake Tunnel of Sanmen Nuclear Power Station 11th

Physical Modeling of a Water Intake Tunnel of Sanmen Nuclear...

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11th International Conference on Coastal and Ocean engineering

作者： Jin, Minghui Zhi, Yuanzhe Yang, Yue Zhang, Wanwei Li, Zhiwei Yan, Shichang Hohai Univ Nanjing 210024 Peoples R China Key Lab Minist Educ Coastal Disaster & Protect Nanjing 210024 Peoples R China Hohai Univ Inst Water Sci & Technol Nanjing 210098 Peoples R China

ISBN: (纸本)9789819601837;9789819601813;9789819601806

To ensure the wave stability of the water intake facilities for Units 5 and 6 of the Sanmen Nuclear Power Project and to measure the wave dissipation characteristics of the combined pump house, a wave flow test was conducted in the harbor basin using a full-terrain simulation. This test established a 1:30 scale normal wave local physical model to analyze the wave and velocity distribution in each compartment of the pump house under various combinations of water levels, waves, and flows. The test results indicate that within the effective propagation length, the influence of wave reflection is significant in the compartments affected by wave radiation, forming stable standing waves and directly governing the wave height distribution in each compartment. Additionally, the steadying effect of the water flow on the waves is notable. When the tidal level drops, the water velocity inside the compartments increases to a range related to the position, and changes in the tidal level can alter the relative velocity distribution of different flow channels at specific locations.

关键词： Water Intake Pump House physical modeling wave reflect flow velocity combined wave-current action

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Utilization of District Morphology for Optimal Energy Performance: A Case Study in Ankara, Turkey 9th

Utilization of District Morphology for Optimal Energy Perfor...

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9th International Building Physics Conference

作者： Kocoglu, Ayse Ozlem Dal Ashrafian, Touraj Ozyegin Univ TR-34794 Istanbul Turkiye Istanbul Tech Univ TR-34367 Istanbul Sisli Turkiye Northumbria Univ Newcastle Upon Tyne NE1 8ST Tyne & Wear England

ISBN: (纸本)9789819783113;9789819783090;9789819783083

This research investigates the influence of district morphology on solar radiation, energy performance, and renewable energy potential. The case district area in Ankara, Turkey, has an area of 76,100 m(2) and 15 apartments and includes almost 2,400 dwellers. The methodology comprises three phases: computational modeling, performance simulations, and comparative assessments. Twenty-eight alternative district models were developed and analyzed using Rhinoceros 7.0 with the combination of Grasshopper plug-ins-Ladybug 1.8.0, Honeybee, and Climate Studio 1.9. The findings highlight that the district scenario with an irregular Y-axis configuration performs most satisfactorily regarding solar radiation, building energy, and photovoltaic panel integration. This alternative model generates the highest electricity from solar canopies, approximately 3.5 times more than PVs on roofs. The model results in a significant reduction of approximately 35% in the district's total primary energy consumption compared to the base scenario.

关键词： Urban District Morphology Energy Performance Simulation Solar Radiation Building Energy

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Daylight Assessment and Implications on the Overall Energy Need in an Office Building: A Case Study 9th

Daylight Assessment and Implications on the Overall Energy N...

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9th International Building Physics Conference

作者： Iatauro, Domenico Zinzi, Michele ENEA Italian Natl Agcy New Technol Energy & Sustainabl Via Anguillarese 301 I-00123 Rome Italy

ISBN: (纸本)9789819783199;9789819783175;9789819783168

The energy use for lighting represents relevant part in the energy balance of office buildings. For this reason, the correct evaluation of the indoor daylight availability, strictly linked to the weather conditions of the site, is a crucial factor to predict the electric use for lighting with more accuracy than the current relevant standard, implemented in the framework of the EPBD. This study compares the indoor daylight levels in an office building, and the related energy performance, calculated according to the relevant standard EN15193-1:2017 and to dynamic climate-based simulation, based on hourly weather data, and those derived by Italian solar radiation dataset. In the latter cases, the electric lighting systems is controlled and switched on/off considering the contribution of daylighting to achieve the visual task set-point. This approach leads to a more realistic evaluation of the daylight autonomy (DA) and, consequently, of the electric lighting demand. In addition to this performance gap assessment, since different operating hours lead to different internal gains, the impact on the space heating and cooling performance of the building is evaluated as well. The simulations, carried out using the EnergyPlus calculation tool, highlighted significant discrepancies in terms of annual energy consumption for lighting (62-78%) and overall energy need. Findings of the study aims at introducing elements of climate-based assessment for a more accurate evaluation of environmental and energy performance and stimulate the upgrade of current standardized approaches, which may lead to relevant performance gap.

关键词： daylight assessment climate-based simulation LENI

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Extensive Evaluation of Eco-Friendly Green Concrete Construction Procedures Utilizing Recycled Waste Materials

Extensive Evaluation of Eco-Friendly Green Concrete Construc...

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2023 International Conference on Environmental Geotechnology, Recycled Waste Materials and Sustainable engineering

作者： Shukla, Bishnu Kant Bharti, Gaurav Shamanth, S. Sharma, Pushpendra Kumar Gowda, Sachin Singh, Devendra Pandey, Abhinav Srivastava, Prashant Mishra, Sahil Singh, Sumeet Kumar JSS Acad Tech Educ Dept Civil Engn Noida 201301 India Lovely Profess Univ Sch Civil Engn Phagwara 144411 India CSIR Cent Rd Res Inst New Delhi 110025 India

ISBN: (纸本)9789819797790;9789819797776;9789819797769

This review critically analyzes the evolution, production, and utilization of "green concrete" in the construction industry, defined by its incorporation of waste materials as part of its composition. It examines the growing trend towards green concrete manufacturing due to environmental challenges presented by conventional concrete, emphasizing the considerable potential of various waste materials as substitutes for natural aggregates. The research scrutinizes the use of waste products such as quarry dust, marble dust, ceramic waste, silica dust, horticultural and aquacultural waste, and recycled concrete aggregates as alternatives to traditional concrete components. Industrial byproducts from demolition and construction projects, including laterite, silica fumes, and waste glass powder, are also explored. This research also highlights how agricultural waste that contains pozzolanic elements, upon fine grinding, can induce a pozzolanic reaction that strengthens concrete. Moreover, the effective incorporation of waste from aquacultural farming into green concrete mixtures is discussed, highlighting its role in mitigating habitat contamination. The study asserts that utilizing these waste materials can not only enhance the mechanical properties of concrete but also lead to significant cost reductions (14-20%) and environmental benefits. Emphasizing the importance of waste management strategies, the paper concludes that an increased focus on recycling and waste utilization can substantially contribute to the sustainability of the construction industry and the production of green concrete. The review also elucidates the origins, characteristics, and attributes of recycled concrete aggregates, reinforcing the assertion that they can deliver comparable performance to conventional concrete, with additional environmental benefits.

关键词： Recycled concrete aggregate Green composite Marble dust Green concrete Agricultural farming waste Aquaculture farming waste Ceramic wastes

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Study of the Thermal Behaviour of a Low Carbon Material: The Case of the Cob

Study of the Thermal Behaviour of a Low Carbon Material: The...

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Annual Conference of the Canadian-Society-for-civil-engineering (CSCE)

作者： Kabore, Aguerata Bendouma, Mathieu Ouellet-Plamondon, Claudiane Univ Quebec Ecole Technol Super Quebec City PQ H3C 1K3 Canada

ISBN: (纸本)9783031615016;9783031614996;9783031614989

Earthen construction is considered as an ecological construction offering many advantages in terms of adaptation to climate change and reduction of CO2 emissions from buildings. The choice of a building material implies a suitable construction technique and an appropriate architecture according to the environmental conditions. The objective of this work is to study the thermal performance of two cob materials, a material traditionally composed of clay, water and wheat fibres through numerical simulations. Two walls designed with clay and four other walls designed with cob (with 3 or 6% fibres) are studied in view of their application in modern wood-frame structures. To this end, the one-dimensional transient heat equation through single-layer walls of 15 cm and 25 cm thickness is solved using the finite element discretization scheme. The thermal properties used for the numerical simulation are experimental data obtained from samples fabricated in a laboratory. The simulations are performed using climate data from Montreal (Canada), Reno (USA) and Djibouti (Africa). The results of the wall simulation are evaluated according to the influence of local meteorological conditions on the interior surface temperature for each type of wall.

关键词： Cob Thermal simulation Fire resistance Green building Clay Wheat fibres

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Experimental Study on Sediment Interception and Drainage System in the Lower Reservoir of Storage Power Station 6th

Experimental Study on Sediment Interception and Drainage Sys...

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6th International Conference on Advances in civil and Ecological engineering Research

作者： Bo, Xiang Wei, Yang Liu Shubao Hou Yanxiang Qin, Lu Beijing Invest Design & Res Inst Co Ltd China Power Construct Grp Beijing Peoples R China China Inst Water Resources & Hydropower Res State Key Lab Basin Water Cycle Simulat & Regulat Beijing Peoples R China

ISBN: (纸本)9789819616299;9789819616275;9789819616268

To research the effect of building a sediment interception and drainage system on reducing sediment accumulation in the lower reservoir of Hunyuan Pumped Storage Power Station, a physical model of the lower reservoir of Hunyuan Pumped Storage Power Station was established. In response to the lack of measured hydrological data, after multiple analogies and analyses, the water sediment relationship of the nearby Jiazhuang hydrological station in the watershed was adopted as the inlet water sediment relationship of the model. The experiment set up two operating conditions, one with a dam and the other without a dam. The experiment set up two working conditions, with and without dams, and conducted experimental research on 5 types of non-standard frequency floods, including 30 years, 40 years, 50 years, 80 years, and 100 years. The results showed that during each non-standard frequency flood process, the sediment concentration and suspended sediment particle size distribution along the way in the reservoir area with dam, as well as the sediment concentration and sediment particle size through the machine, were much smaller than those without dam;After exceeding the standard frequency of floods, the sedimentation thickness, sedimentation amount, dead storage capacity, and effective storage capacity loss of the lower reservoir are also smaller than those without dam. The sand prevention effect of this sand retention and drainage system is very obvious. Therefore, it is necessary to build a sand retention and drainage system for the Hunyuan pumped storage power station.

关键词： Pumped storage power stations Sand interception and drainage system Necessity Model test

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