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作者： Oktavianus, Yusak Yao, Huang Goldsworthy, Helen M. Gad, Emad F. Department of Infrastructure Engineering University of Melbourne Melbourne Australia Australia Xing One Pty Ltd Lidcombe Australia Chair of Civil and Construction Engineering Faculty of Science Engineering and Technology Swinburne University of Technology Hawthorn Australia

The use of concrete-filled steel circular hollow sections as columns is becoming more popular because of their superior capacity, good ductility and large energy absorption capacity. The utilisation of blind bolts, which can be installed from the outside of the column, is possible and has been the subject of considerable research. Results from pull-out testing of blind bolts and the headed anchor blind bolt, which is a modification of the original blind bolt, are reported in this paper. The tests were performed to establish the behaviour of individual bolts. Results from the research will ultimately be used in the design of moment-resisting connections using these bolts. The effect of varying several parameters such as the tube thickness, bolt diameter and embedment depth were investigated both experimentally and by way of numerical models using finite-element analysis. After achieving a good agreement between the experimental and numerical results, further analysis was implemented to determine the relative contributions of the concrete and tube wall to the pull-out resistance. Parametric studies on concrete strength and embedment depth were also performed. © 2015 ICE Publishing: All rights reserved.

关键词： Bolts

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Wedge splitting test of foam concrete specimens: Calibration curves 13

Wedge splitting test of foam concrete specimens: Calibration...

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13th International Conference on Fracture and Damage Mechanics, FDM 2014

作者： Seitl, Stanislav Merta, Ildikó Veselý, Václav Institute of Physics of Materials Academy of Science of the Czech Republic Brno Czech Republic Institute of Building Construction and Technology Faculty of Civil Engineering University of Technology Vienna Austria Faculty of Civil Engineering Brno University of Technology Brno Czech Republic

In the present paper, the well-known wedge splitting test is applied on specimens made from foam concrete. In the case of this material the whole test specimens cannot be made from foam concrete but the rectangular groove, needed for the load transmission pieces, has to be made of stiffer material (typically marble). K-calibration (B1) and T-stress (B2) calibration curves for such specimens are introduced. The objective was to compare and discuss the calibration curves for the homogeneous case, the case with marble parts and the case with marble parts considering the glued marble/foam concrete interface.

关键词： Calibration

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Critical ICT-Inhibiting Factors on IBS Production Management Processes in the Malaysia construction Industry

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IOP Conference Series: Materials Science and engineering 2017年第3期245卷

作者： Peniel Ang Soon Ern Narimah Kasim Zuhairi Abd Hamid Goh Kai Chen Department of Civil Engineering Technology Faculty of Engineering Technology Universiti Tun Hussein Onn Malaysia 86400 Parit Raja Johor Malaysia Construction Research Institute of Malaysia (CREAM) Makmal Kerja Raya Malaysia IBS Centre 1st Floor Block E Lot 8 Jalan Chan Sow Lin 55200 Kuala Lumpur Malaysia Department of Construction Management Faculty of Technology Management and Business Universiti Tun Hussein Onn Malaysia 86400 Parit Raja Johor Malaysia

Industrialized Building System (IBS) is one of the approaches that had been introduced as an alternative to conventional building method where it becomes the new strategy of enhancing the sustainable construction in current industries while spearheading a huge advancement of benefits with green constructions into the existing industries. The IBS approach is actively promoted through several strategies and incentives as an alternative to conventional building methods. Extensive uptakes of modern Information Communication technology (ICT) applications are able to support the different IBS processes for effective production. However, it is argued that ICT uptake at the organisational level is still in its infancy. This raises the importance to identify critical inhibitors which are inhibing the effective uptake of ICT in the IBS production management process. Critical inhibitors to ICT uptake were identified through questionnaire survey with the IBS industry stakeholders. The mean index and critical t-values are generated with the use of the quantitative tool, Statistical Package for Social Sciences (SPSS). The top ten priority ranked inhibitors reflect the Cost, People and Process elements to ICT uptake. High costs in acquiring the technologies and resistance to change were some main concerns from the findings.

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Investigation of stress in the railway substructure in the turnout 53

Investigation of stress in the railway substructure in the t...

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53rd International Conference on Experimental Stress Analysis, EAN 2015

作者： Smutny, J. Pazdera, L. Brno University of Technology Faculty of Civil Engineering Department of Railway Structures and Construction Veveri 95 Brno Czech Republic Brno University of Technology Faculty of Civil Engineering Department of Physics Veveri 95 Brno Czech Republic

ISBN: (纸本)9788001057343

The paper is focused on the stress measurement in the railway substructure in the turnout prototype designed for a high speed. The aim of the measurement and its evaluation was to compare the results obtained with theoretical presumptions. The methods of the measurement and its evaluation are described. The conclusions of the stress in the railway substructure included its relation with the train speed. It may also be stated that the quality elaboration of the measurement considerably contributed to modern means of the signal analysis.

关键词： Railroads

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Thermal Performance of Precast Concrete Sandwich Panel (PCSP) Design for Sustainable Built Environment

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IOP Conference Series: Materials Science and engineering 2017年第3期245卷

作者： Peniel Ang Soon Ern Lim Mei Ling Narimah Kasim Zuhairi Abd Hamid Md Asrul Nasid Bin Masrom Department of Civil Engineering Technology Faculty of Engineering Technology Universiti Tun Hussein Onn Malaysia 86400 Parit Raja Johor Malaysia Department of Construction Management Faculty of Technology Management and Business Universiti Tun Hussein Onn Malaysia 86400 Parit Raja Johor Malaysia Construction Research Institute of Malaysia (CREAM) Makmal Kerja Raya Malaysia IBS Centre 1st Floor Block E Lot 8 Jalan Chan Sow Lin 55200 Kuala Lumpur Malaysia

Malaysia's awareness of performance criteria in construction industry towards a sustainable built environment with the use of precast concrete sandwich panel (PCSP) system is applied in the building's wall to study the structural behaviour. However, very limited studies are conducted on the thermal insulation of exterior and interior panels in PCSP design. In hot countries such as Malaysia, proper designs of panel are important to obtain better thermal insulation for building. This study is based on thermal performance of precast concrete sandwich panel design for sustainable built environment in Malaysia. In this research, three full specimens, which are control specimen (C), foamed concrete (FC) panels and concrete panels with added palm oil fuel ash (FC+ POFA), where FC and FC+POFA sandwiched with gypsum board (G) were produced to investigate their thermal performance. Temperature difference of exterior and interior surface of specimen was used as indicators of thermal-insulating performance of PCSP design. Heat transfer test by halogen lamp was carried out on three specimens where the exterior surface of specimens was exposed to the halogen lamp. The temperature reading of exterior and interior surface for three specimens were recorded with the help of thermocouple. Other factors also studied the workability, compressive strength and axial compressive strength of the specimens. This study has shown that FC + POFA specimen has the strength nearer to normal specimen (C + FC specimen). Meanwhile, the heat transfer results show that the FC+POFA has better thermal insulation performance compared to C and FC specimens with the highest temperature difference, 3.4°C compared to other specimens. The results from this research are useful to be implemented in construction due to its benefits such as reduction of energy consumption in air-conditioning, reduction of construction periods and eco-friendly materials.

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An eco friendly solution to the food waste disposal

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AIP Conference Proceedings 2017年第1期1859卷

作者： G. Reddy Babu G. Madhav Kumar 1Professor Department of Civil Engineering Vishnu Institute of Technology Bhimavaram Andhra Pradesh India 2Cluster EHS Manager Hyderabad Cluster B&F-L&T Construction Telangana State India

In recent years, waste disposal at workmen camp is one of the major problems being faced by many nations across the world. In the workmen colony at Chittapur, a series of kitchens were built for cooking purpose and a number of small canteens are also functioning. Considerable quantity of food waste is collected daily from these eateries and disposed at a faraway place. Food waste is highly degradable in nature, if not disposed properly it causes problems related to environmental pollution. Hence, it is very important to identify an environment friendly process rather than opt for land filling or any disposal method. We worked together to find a suitable eco-friendly solution for the food waste disposal at Chittapur site and suggested that biogas production through anaerobic digestion is a solution for the disposal and utilization of food waste for better purpose. This resulted in setting up a 500 kg per day food waste treatment biogas plant at Chittapur. This establishment is the first time in the construction industry at workmen camp in India. Anaerobic Digestion has been recognized as one of the best options that is available for treating food waste, as it generates two valuable end products, biogas and compost. Biogas is a mixture of CH4 and CO2 about (55:45). Biogas generated can be used for thermal applications such as cooking or for generating electricity. The digested slurry is a well stabilized organic manure and can be used as soil fertilizer. Plant design is to handle 500 kg of food waste /day. 27 kg LPG is obtained from 500kg of kitchen waste. The Value of 27 kg of LPG is Rs.2700/day. Daily 1000 litres of digested effluent was obtained. It is good organic manure with plant micro nutrients and macro nutrients. This can be used for growing plants and in agriculture. The value of manure per day is Rs.250/-. The annual revenue is Rs.10.62 lakhs and the annual expenditure is 1.8 lakhs. The net benefit is 8.82 lakhs. Payback period is 2.1 years. This process co

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Analysis on the collision couple between drift ice and long-span prestressed concrete T-rigid frame bridge pier

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Key engineering Materials 2015年 648卷 17-24页

作者： Zhang, Jianmin Yuan, Zhengguo Wu, Yingping School of Civil Engineering Northeast Forestry University Harbin150090 China China Railway 23th Construction Bureau. Ltd. Chengdu610072 China School of Transportation Science and Engineering Harbin Institute of Technology Harbin150090 China

Long-span bridge across the river in cold areas, is often impacted by the drift ice in spring, thus having some severe effects on the stability and vibration of the bridge structure. With a long-span prestressed concrete T-rigid frame bridge as studied object, based on the display analysis function of the LS-DYNA software, this paper represents the simulating process of the contact and collision between the drift-ice and T-rigid frame bridge pier, and the influence of various factors was analyzed, such as model boundary condition, contact types of river ice and pier, algorithm and element connection transition area. Thus the reasonable calculation model of the collision force caused by drift-ice to pier was determined. The result has important theoretical and practical value to ensure the safety of the bridge in cold area, as well as to reduce the project cost. © 2015 Trans Tech Publications, Switzerland.

关键词： Prestressed concrete

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Anchorage Behaviors of Frictional Tieback Anchors in Silty Sand

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IOP Conference Series: Materials Science and engineering 2017年第1期216卷

作者： Shih-Tsung Hsu Wen-Ta Hsiao Ke-Ting Chen Wen-Chi Hu Ssu-Yi Wu Department of Construction Engineering Chaoyang University of Technology 168 Jifeng E. Rd. Wufeng Dist. Taichung Taiwan. Department of English Taichung University of Education No. 140 Minsheng Rd. West Dist. Taichung Taiwan. Department of Civil and Construction Engineering National Taiwan University of Science and Technology No. 43 Keelung Rd. Sec.4 Da'an Dist. Taipei Taiwan.

Soil anchors are extensively used in geotechnical applications, most commonly serve as tieback walls in deep excavations. To investigate the anchorage mechanisms of this tieback anchor, a constitutive model that considers both strain hardening and softening and volume dilatancy entitled SHASOVOD model, and FLAC3D software are used to perform 3-D numerical analyses. The results from field anchor tests are compared with those calculated by numerical analyses to enhance the applicability of the numerical method. After the calibration, this research carried out the parameter studies by numerical analyses. The numerical results reveal that whether the yield of soil around an anchor develops to ground surface and/or touches the diaphragm wall depending on the overburden depth H and the embedded depth Z of an anchor, this study suggests the minimum overburden and embedded depths to avoid the yield of soils develop to ground surface and/or touch the diaphragm wall. When the embedded depth, overburden depth or fixed length of an anchor increases, the anchorage capacity also increases. Increasing fixed length should be the optimum method to increase the anchorage capacity for fixed length less than 20m. However, when the fixed length of an anchor exceeds 30 m, the increasing rate of anchorage capacity per fixed length decreases, and progressive yield occurs obviously between the fixed length and surrounding soil.

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Comparison of the system of construction quality control on cross-strait

Comparison of the system of construction quality control on ...

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International Conference on Logistics, Informatics and Service Sciences (LISS)

作者： Xiaoxiao Zheng Yisheng Liu Ying Shi Nan Su School of Economics and Management Beijing Jiaotong University Beijing China School of Economics and Management Hebei Institute of Architecture and Civil Engineering Zhang Jiakou China Department of construction National Yunlin University of Science and Technology Chinese Yunlin

ISBN: (纸本)9781509011032

construction engineering products have the characteristic of one-time, so high quality is the eternal pursuit of various countries and various areas all over the world. In recent years, frequent accidents are triggered by inferior engineering quality, and the consequences of loss cannot be estimated. So, the construction engineering quality caused the extensive concern of the government, strengthening the supervision and management becomes the main current work. On June 21, 2013, with the signing of Cross-Strait Service Trade Agreement, it has a regulation: Taiwanese stakes in companies can bidding project in the mainland, Taiwan open construction and renovation industry. The rule provides an opportunity for the exchange of cross-strait construction development. Because both sides of the social system is different, the management system of construction project is different, too. In order to solve the system obstacles for communication development. This paper uses the literature research, comparison research methods, analyses both sides of the construction project quality supervision system, to form the main innovative results of the article. After comparison and analysis, putting forward improvement opinions.

关键词： Government Law Buildings Inspection Quality control

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Study of the technical capability of sugarcane bagasse ash in concrete production 1st

Study of the technical capability of sugarcane bagasse ash i...

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1st International Conference on civil engineering and Materials Science, ICCEMS 2016

作者： Da Cruz Sessa, Thiago Silvoso, Marcos Martinez Vazquez, Elaine Garrido Qualharini, Eduardo Linhares Haddad, Assed Naked Alves, Lais Amaral Department of Civil Construction Federal University of Rio de Janeiro Av. Athos da Silveira Ramos 149 CT – Sector A 2o floor – Cidade Universitária Rio de JaneiroRJ21941-909 Brazil Department of Construction Technology Federal University of Rio de Janeiro Av. Pedro Calmon 500 Reitoria – Cidade Universitária Rio de JaneiroRJ21941-590 Brazil Department of Civil Engineering Federal Center of Technological Education Celso Suckow da Fonseca Av. Maracanã 229 – Sectos E 2º floor DEPEC - Maracanã Rio de JaneiroRJ20271-110 Brazil

ISBN: (纸本)9783038357483

Cement industry has a great contribution to CO2emissions in the world. In order to reduce the levels of CO2emissions and the consequences of global warming, some researches have been developed aiming to reduce the cement volume produced through mineral mixtures. Sugarcane bagasse ash (SCBA) represents an important environmental liability of the alcohol industry in the northern state of Rio de Janeiro and its use as a partial replacement of Portland cement in concrete has shown great potential for use. This paper aims to analyze, through experimental procedures, the consistency and mechanic strength on concrete with low environmental impact, made from sugarcane bagasse ash, in substitution levels of 20% and 40%. The methodology of the experimental program, included the steps of characterizing the materials;definition of the reference concrete;molding and dosing of the reference concrete and concrete with SCBA;mechanical tests to evaluate the resistance in the reference test bodies;and analysis of the results. The method used from production and processing of the ash to the characterization of other materials in the concrete are also addressed in this study. The results indicate the feasibility of using sugarcane bagasse ashes in application of concretes in the construction industry. © 2016 Trans Tech Publications, Switzerland.

关键词： Environmental impact

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