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

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Consequence of Communication Problem for Higher Authority of Construction Industry in India

Consequence of Communication Problem for Higher Authority of...

引用

International Conference on Advances in Construction Materials and Management (ACMM)

作者： Rajprasad, J. Prasad, Manish Pannirselvam, N. SRM Inst Sci & Technol Dept Civil Engn Kattankulathur 603203 Tamil Nadu India

ISBN: (纸本)9789811658396;9789811658389

The construction industry has a challenging working environment, in which communication is a key factor among the individuals involved in management (technical team). In the construction industry, people who are in different positions in the company may have ego/status problems among themself. Higher authority may or may not support the junior level employees to come forward and may not share project-specific information. So, lack of communication results in a poor working environment and mutual understanding between employees. In this study, examination of communication problems and their impacts are observed. This study is based on the parameters like cultural differences, gender differences, language, and physical barriers. The questionnaire approach is used to perform this study. The data obtained through the questionnaire is analyzed using the software. The main aim of the study is to establish a better framework for effective communication in the construction industry.

关键词： Attitude Cultural differences Labor productivity Lack of motivation Working environment

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Bond Performances of SRG Composites: Experimental and Numerical Investigation 10th

Bond Performances of SRG Composites: Experimental and Numeri...

引用

10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in civil engineering (CICE)

作者： Ombres, Luciano Verre, Salvatore Univ Calabria Dept Civil Engn Arcavacata Di Rende Italy

ISBN: (纸本)9783030881665;9783030881658

The Steel Reinforced Grout (SRG) composite system represents a newly developed promising technique for strengthening existing reinforced concrete and masonry structures. The SRG composite was comprised of steel fiber strips embedded within two layers of inorganic matrix. Nevertheless, the matrix is responsible for the stress-transfer in composites. The experimental results present in literature show a slippage of the fibers and fracture of the external matrix layer at the fiber-matrix interface. This is a critical phenomenon in structural strengthening applications. The present paper presents the results of an experimental and numerical investigation on the bond performances of the SRG system bonded to concrete substrate. The FE analysis was developed using Abaqus-code with a bond slip model present in literature. In addition, the aim of the FE analysis was to predict the behavior of concrete joints strengthened with SRG composites. The parameters of the bond slip model law were calibrated on the results of the experimental campaign. The experimental campaign was focused on the concrete joint strengthened with SRG, in particular, the tests were conducted by a single lap direct shear test varying the bonded length. Finally, the comparison between the numerical and experimental curves was carried out in terms of peak load.

关键词： Numerical model SRG Direct shear test/bond Concrete joints

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Segmental Hollow Concrete Filled FRP Tubes (CFFT) for Wind Turbine Towers 10th

Segmental Hollow Concrete Filled FRP Tubes (CFFT) for Wind T...

引用

10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in civil engineering (CICE)

作者： Watfa, Abdul Green, Mark Fam, Amir Noel, Martin Queens Univ Kingston ON Canada Univ Ottawa Ottawa ON Canada

ISBN: (纸本)9783030881665;9783030881658

Concrete-filled fibre-reinforced polymer (FRP) tubes (CFFTs) have been shown to be effective as both compression and flexural members in bridges. The main objective of this research is to extend this design concept to wind turbine towers. This study aims to evaluate the flexural performance of segmental and non-segmental hollow post-tensioned CFFTs (PT-CFFTs) through an experimental investigation. Four large-scale specimens have been constructed and will be tested under three-point bending, including three segmental hollow PT-CFFT specimens and one non-segmental hollow PT-CFFT control specimen. The specimens have been designed to study the influence of the following parameters on the performance of tapered hollow CFFT wind turbine towers subjected to bending loads: segmental construction methods for scaled wind turbine towers, contribution of outer GFRP tubes, and overlapping length between consecutive CFFT segments. The GFRP tube combined with the post-tensioned concrete system is intended to improve the constructability and structural efficiency of small scale wind turbines for remote areas such as the Canadian North. The optimal overlap length between two GFRP tubes required to develop the full flexural capacity of the CFFT system will be determined experimentally, and the feasibility of combining GFRP tubes, prestressing systems, and segmental construction in tapered wind turbine towers will be evaluated. In this paper, the relevant literature is reviewed and the preliminary experimental progress is presented.

关键词： FRP Post-tensioning Segmental construction Concrete CFFT Wind turbine towers

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Sustainable Rice Supply Chain Management in the Mekong Delta of Vietnam: The Role of Regional Rice Logistics Centre 6th

Sustainable Rice Supply Chain Management in the Mekong Delta...

引用

6th International Conference on Geotechnics, civil engineering and Structures (CIGOS)

作者： Nguyen Thi Binh Bui Thi Ly Foreign Trade Univ 91 Chua Lang Hanoi Vietnam Foreign Trade Univ 91 Lang Thuong Hanoi Vietnam

ISBN: (纸本)9789811671609;9789811671593

The study aims at investigating and assessing the impacts of the logistics centre on sustainable development of the rice supply chain in the Mekong Delta of Vietnam. In order to achieve these objectives, the current situation of rice logistics including the overall supply chains from production in theMekong Delta to consumption is described. Potential rice logistics centre in the context the Mekong Delta will be compiled, and the importance of this measure is examined by conducting an expert interview survey based on theMulti-Criteria Assessment (MCA) method. According to the results, the initiative of establishing a rice logistics centre located close to the centralized rice production areas in theMekong Delta is expected toward more inland waterway use, thereby reducing the number of ton-km for road. In addition to this, the intervention would improve remarkably the social-economic efficiency through reducing total logistics cost and emission cost for the rice industry of Vietnam.

关键词： Rice supply chain management Impact assessment Multi-criteria assessment method

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Seismic Resistant Configurations for Concentrically Braced Frames 10th

Seismic Resistant Configurations for Concentrically Braced F...

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10th International Conference on the Behaviour of Steel Structures in Seismic Areas (STESSA)

作者： Marcu, Ramona Kober, Helmuth Tech Univ Civil Engn Bucharest Bulevardul Lacul Tei 124 Bucharest 020396 Romania

ISBN: (纸本)9783031038136;9783031038112;9783031038105

The present paper intends to point out some features of different bracing configurations used frequently in concentrically braced frames located in seismic areas. Four concentrically braced frames with six and ten storeys (eight in total) were sized for the same seismic action evaluated according to the prescriptions of EN 1998-1:2004 and the in charge Romanian seismic design code. Four concentrically bracing configurations frequently used in seismic resistant structures were analysed: ascending bracing, descending bracing, X bracing and "2 storey - X" bracing. All analysed frames had two spans of 6.0 m and a storey height of 3.5 m. The behaviour of the frames during dynamic nonlinear analyses was compared. Three base excitations of Vrancea earthquakes were considered, recorded in or around Bucharest at 04.03.1977;31.08.1986 and 30.05.1990. All considered acceleration records were calibrated to a peak ground acceleration value of about 0.3 times the acceleration of gravity. Damping was taken into account using the Rayleigh procedure. The history of the formation of plastic hinges was observed. The maximum values for axial forces, bending moments and inelastic deformations recorded in different member types, the extreme values of horizontal displacements and base shear forces were compared. Another objective was the comparison of the estimated steel consumption.

关键词： Bracing systems Dissipated energy Braces elongations Plastic hinge rotations Estimated steel consumption

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Integrating Lean and Sustainability Approach for Construction Firms

Integrating Lean and Sustainability Approach for Constructio...

引用

International Conference on Advances in Construction Materials and Management (ACMM)

作者： Anandh, S. Nachiar, S. Sindhu Mariappan, Preethiba Abeshek, C. S. Sai SRM Inst Sci & Technol Dept Civil Engn Kattankulathur 603203 Tamil Nadu India

ISBN: (纸本)9789811658396;9789811658389

Lean construction is the mode of production which is designed to minimize the cost, materials and time. Virtually the lean technique is to reduce the poor quality and maximize the favourable outcomes in the construction industry. This study provides basic understanding of lean in construction, obstacles of lean in construction, factors for lean construction, lean techniques and benefits of lean construction. The objective of the research is to identify the link between lean and sustainability, barriers of lean and sustainability, success key factors of lean and sustainability, benefits of linking lean and sustainability, area of link between the lean and sustainability.

关键词： Lean construction Barriers Factors of lean Lean techniques Sustainability

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Workability and Density of Concrete Containing Coconut Fiber 1

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3rd International Conference on Green Environmental engineering and Technology (IConGEET) / 7th International Conference on Green Design and Manufacture (IConGDM)

作者： Ibrahim, Norlia Mohamad Rahim, Nur Liza Amat, Roshazita Che Rahim, Mustaqqim Abdul Woo, Chin Kah Zakarya, Irnis Azura Moncea, Andreea Univ Malaysia Perlis Ctr Excellence Geopolymer & Green Technol CEGeoGT Sustainable Environm Res Grp SERG Kangar 01000 Perlis Malaysia Univ Malaysia Perlis Fac Civil Engn Technol Arau 02600 Perlis Malaysia Natl Inst Res & Dev Environm Protect Bucharest IN 294 Splaiul Independentei St6th Dist Bucharest 060031 Romania

ISBN: (数字)9789811679209

ISBN: (纸本)9789811679209;9789811679193

Use of natural fiber in concrete to enhance the strength of concrete have been used widely and become as part of an alternative building materials. For instance, the use of coconut fiber (CF) which are non-hazardous, environmental-friendly and can improves the engineering properties of concrete. The aim of this study is to identify the workability and density of CF modified concrete. CF were added into the mixture in 3 different amount that is 200 g, 400 g, and 600 g. The size of the cube samples is 100 x 100 x 100 mm and were cured for 14 days, and 28 days. To evaluate the effect of CF in improving the properties of concrete, the properties of ordinary concrete are used as a reference which consist 0% CF. The fresh and hardened densities for all samples also show that when more fiber was added into mixture, densities reduced. As summary, the study shows that by adding CF in concrete reduced the workability and density of concrete.

关键词： Concrete Construction materials Workability Density Coconut fiber

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Rainwater Harvesting System: Design Performances of Optimal Tank Size Using Simulation Software 1

引用

3rd International Conference on Green Environmental engineering and Technology (IConGEET) / 7th International Conference on Green Design and Manufacture (IConGDM)

作者： Hilmi, Farisya Aliya Khalid, Azianabiha A. Halip Univ Teknol MARA Coll Engn Sch Civil Engn Shah Alam 40450 Selangor Malaysia

ISBN: (数字)9789811679209

ISBN: (纸本)9789811679209;9789811679193

Rainwater harvesting (RWH) system has become a high potential source of water supply in urban areas. It is a practical solution to combat water crisis and can also contribute to reduce a storm's peak flow. This research aims to determine the feasibility and design performance of RWH for Kolej Melati, UiTM Shah Alam, Selangor. The performances of various storage tank sizes were calculated using Tanki NAHRIM 2.0. Finding from the software simulation was used to select the optimum tank size which provide highest water saving and reliability. The monthly analysis of the RWHS shows promising results of collectable water on the demand, in which the average reliability was higher than 50%. The result showed that the best tank size Kolej Melati is 100 m(3). About 46.6% of rainwater from roof can be used that provide 83.7% of water demand. This amount is equivalent to 2639.56 m( )(3)to fulfill the water requirement for 297 days per year. Therefore, the proposed implementation of RWH system in Kolej Melati is highly viable and the outcome could support green campus initiative by the university.

关键词： Rainwater harvesting Optimum tank size Tangki NAHRIM Water saving efficiency

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Geotechnical Investigation of Urban Roads with Composite Pavement Structures Using Destructive and Non-destructive Testing 4th

Geotechnical Investigation of Urban Roads with Composite Pav...

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4th International Conference on Transportation Geotechnics (ICTG)

作者： Moaveni, Maziar Butt, Abbas A. Gundapuneni, Satish Groves, Adam D. Widener, Sean M. Savannah State Univ Savannah GA 31404 USA Engn & Res Int Inc Savoy IL 61874 USA Clark Dietz Inc Champaign IL 61820 USA

ISBN: (纸本)9783030772383;9783030772376

Effective assessment of bearing capacity of the existing pavement structure as well as proper characterization of materials used in the construction of pavement layers provides critical inputs for rehabilitation design of urban roads. This study presents the findings from a comprehensive pavement geotechnical investigation that was performed on approximately 2300 ft of composite pavement (AC on top of PCC) located on Curtis road in Savoy, Illinois. Non-destructive testing program included falling weight deflectometer (FWD) as well as ground penetrating radar (GPR) at both center and transverse joint locations. Additionally, destructive testing program including pavement borings, pavement coring at crack locations, deep and shallow soil borings, dynamic cone penetration (DCP) testing on aggregate base, and subgrade as well as soil sampling and laboratory testing was performed. GPR scans obtained at three different antenna's frequencies including 2 GHz, 900 MHz, and 400 MHz were analyzed and calibrated by pavement cores to generate pavement layer thickness profiles. Statistical analysis methods were used to identify trends and develop correlations between the laboratory and field test results. This includes finding linkage between the pavement thicknesses obtained through coring and what was estimated using GPR. The findings from this study showed that strength, bonding status, and thickness variability of pavement layers as well as groundwater table and in-situ moisture condition of the subgrade soil significantly affect the surface pavement deflections.

关键词： Composite pavements Falling weight deflectometer Ground penetrating radar Geotechnical investigations Urban roads Pavement rehabilitation design

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Development and Application of Multi-stage Steel Dampers 10th

Development and Application of Multi-stage Steel Dampers

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10th International Conference on the Behaviour of Steel Structures in Seismic Areas (STESSA)

作者： Li, Guo-Qiang Jin, Hua-Jian Pang, Meng-De Sun, Ying-Zhi Hu, Da-Zhu Sun, Fei-Fei Tongji Univ State Key Lab Disaster Reduct Civil Engn Shanghai Peoples R China Tongji Univ Coll Civil Engn Shanghai Peoples R China Shanghai LANKE Bldg Damping Technol Co Ltd Shanghai Peoples R China

ISBN: (纸本)9783031038136;9783031038112;9783031038105

Yielding of steel can dissipate a substantial amount of energy, which can be used in steel dampers for mitigating seismic effect on engineering structures. However, the accumulation of cyclic plastic deformation of steel due to earthquakes may lead to low-cycle fatigue fractures of steel dampers. Though the accumulated plastic deformation capacity of steel can be increased by employing low-yielding ductile steel, plastic deformation capacity of steel is still limited. Nevertheless, the plastic deformation demands on steel dampers are various, which depend on their working range of earthquake levels. If steel dampers are required to dissipate energy in the range of earthquakes at both minor and major levels, the accumulated plastic deformation would be too large for steel dampers to accommodate. To solve this problem, the concept of multi-stage steel dampers is proposed. A multi-stage steel damper is a combination of two or even three steel dampers to effectively work in various ranges of earthquake levels. The working range can be between minor and moderate earthquake levels, between moderate and major earthquake levels, and even between major and mega earthquake levels. Since each steel damper only needs to meet the requirement on a relatively narrow range of working earthquake levels, the demands of accumulated plastic deformation can be easily met. Based on the concept of multi-stage steel dampers, the multi-stage steel beam-type dampers and brace-type dampers has been developed. The configuration and performance objectives of multi-stage steel beam-type and brace-type dampers are presented and their workability at various earthquake levels are demonstrated with experiments. The effectiveness of application of multi-stage steel beam-type and brace-type dampers in practical projects are also presented in comparison with usage of traditional dampers.

关键词： Multi-stage steel damper Capacity of accumulated plastic deformation Configuration and performance objectives Experimental demonstration Practical application

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