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

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Experimental Study on Mechanical Properties of Bamboo Culms and Joints Reinforced with GFRP Sheets 10th

Experimental Study on Mechanical Properties of Bamboo Culms ...

引用

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

作者： Zhang, Zhancheng Meng, Xinmiao Zhai, Jiaqi Feng, Peng Beijing Forestry Univ Dept Civil Engn Beijing 100083 Peoples R China Tsinghua Univ Dept Civil Engn MOE Key Lab Civil Engn Safety & Durabil China Beijing 100084 Peoples R China

ISBN: (纸本)9783030881665;9783030881658

Bamboo is a kind of a green renewable traditional building material with the advantages of high tensile strength parallel to grain and fast growth, which can meet the development needs of green and ecological fabricated buildings. However, the round bamboos are likely to crack under pressure, especially at the bottom of the column and bolted bamboo joint, because of stress concentration. To solve the above problems, glass fiber reinforced polymer (GFRP) was used to strengthen the natural bolted bamboo joints in this study. Then shear tests and pressure tests were carried out in order to find an effective way to improve the compression resistance capability of the bamboo column and shear behavior of bolted bamboo joint. The bearing capacity and failure modes were observed and studied. Compared with the specimens without reinforcement, the maximum deformation capacity of the GFRP reinforced bamboo column specimens is increased by at least 2.5 times, and the bearing capacity is increased by 5.5%-11.7%;the maximum deformation capacity of the GFRP reinforced bamboo joint specimens is increased by at least 2.5 times, and the bearing capacity is increased by 3-6 times. Therefore, GFRP is a kind of material which can greatly improve the deformation and bearing capacity of bamboo column or bolted bamboo joint. In addition, GFRP can prevent brittle failure and improve ductility of *** the bearing capacity of GFRP reinforced bamboo joints has been greatly improved compared with that without reinforcement and the stress has also been greatly enhanced, the maximum load that the bamboo joint can bear is still far lower than that of the bamboo column due to the lack of bearing area. How to make full use of the bearing capacity of bamboo in addition to the node is the key point to be solved in the future, one suggestion is to add fillers to bamboo joints.

关键词： Fiber reinforced polymer Bamboo culm Partially reinforcement Bamboo joint

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Unravelling the Performance of Microbial Fuel Cell for Simultaneous Binary Dyes Remediation and Bioelectricity Generation 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： Tan, Sing-Mei Ong, Soon-An Wong, Yee-Shian Abidin, Che Zulzikrami Azner Ho, Li-Ngee Noor, Norazian Mohamed Moncea, Andreea Univ Malaysia Perlis Ctr Excellence Water Res & Environm Sustainabil G Arau 02600 Perlis Malaysia Univ Malaysia Perlis Fac Civil Engn Technol Arau 02600 Perlis Malaysia Univ Malaysia Perlis Fac Chem Engn Technol Arau 02600 Perlis Malaysia Univ Malaysia Perlis Ctr Excellence Geopolymer & Green Technol CeGeoGT Sustainable Environm Res Grp SERG 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

This study was to examine the bioremediation of wastewater containing a binary mixture of methyl orange (MO) and reactive black 5 (RB5), as well as bioelectricity generation in single chamber up-flow membrane-less microbial fuel cell (UFML-MFC). Decolourisation performance and power density of MFC were studied with different concentrations of binary dye (25, 50 and 75 mg/L) as influent. The colour removals evaluated from the standard curve of dye against optical density at its maximum absorption wavelength were 80.40%, 70.33% and 56.99%, respectively in the three phases of study. The decolourisation extent of RB5 is comparatively higher than MO in the binary mixture, due to the presence of more sulphonate groups in the molecular geometry of RB5. The reductive cleavage of azo bond was denoted by UV spectroscopic analysis.

关键词： Microbial fuel cell Binary dyes Decolourisation Bioelectricity generation

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Treatment of Leakage Disease of a Deep Foundation Pit 1

引用

8th International Conference on civil engineering (ICCE)

作者： Liu, Hui Zhang, Xinjie Yunnan Land & Resources Vocat Coll Dept Architecture & Civil Engn Kunming 65000 Yunnan Peoples R China YCIH Fdn Engn Co Ltd Kunming 65000 Yunnan Peoples R China

ISBN: (数字)9789811912603

ISBN: (纸本)9789811912603;9789811912597

Due to the influence of groundwater runoff, the local water stop curtain of a deep foundation pit of a project failed, resulting in leakage of the foundation pit, which seriously threatens the safety of the foundation pit and surrounding buildings. After several rounds of site survey and demonstration, measures were adopted to "treat the leakage utilizing external sealing and internal blocking, a combination of dredging and blocking, and local strengthening", and an emergency rescue team was established to promptly eliminate potential safety hazards.

关键词： Deep foundation pit Water stop curtain Leakage Treatment

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Design, Analysis and Assessment of MRFs Equipped with FREEDAM Connections and Designed by TPMC: Comparison with Traditional Connections 10th

Design, Analysis and Assessment of MRFs Equipped with FREEDA...

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

作者： Maglio, Maria Montuori, Rosario Nastri, Elide Piluso, Vincenzo Univ Salerno Dept Civil Engn Via Giovanni Paolo II 132 I-84084 Fisciano SA Italy Univ Salerno Dept Pharm Via Giovanni Paolo II 132 I-84084 Fisciano SA Italy

ISBN: (纸本)9783031038136;9783031038112;9783031038105

Moment Resisting Frames were designed according to the Theory of Plastic Mechanism Control specialized for use in the Ductility Classes proposed in the new Eurocode 8 namely DC2 and DC3. These frames are equipped with both traditional haunched connections, analysed in the framework of the RFCS founded EqualJoints Plus research project, and FREEDAM joints analysed in the framework of the RFCS founded FREEDAM Plus. The seismic performances of the structures are investigated by both pushover and nonlinear dynamic analyses.

关键词： TPMC Ductility class Prequalified connections FREEDAM plus Performance evaluation

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Effect of Fabric Reinforced Cementitious Mortar (FRCM) on the Strength of Shear-Damaged Reinforced Concrete Beams 10th

Effect of Fabric Reinforced Cementitious Mortar (FRCM) on th...

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

作者： Kennedy, Dylan Rteil, Ahmad Univ British Columbia Sch Engn Kelowna BC Canada

ISBN: (纸本)9783030881665;9783030881658

This paper discusses an experimental study on the shear strengthening of damaged reinforced concrete beams using fabric reinforced cementitious mortar (FRCM). The key parameters studied were: 1) level of damage, namely presence of the first shear crack and 70% of the ultimate theoretical load and 2) the wrapping scheme used (continuously wrapped and intermittent strips). In total six 2 m long rectangular beams were constructed, one of the beams was left unstrengthened to act as control specimen, while all of the remaining beams were wrapped using a U-shaped wrapping scheme. Two beams were strengthened prior to any loading and the remaining three beams were repaired after sustaining the specified damage. When comparing the two wrapping schemes, it was found that, while both were able to increase the load-carrying capacity of the beams, specimens with intermittent wrapping had about 88% of the capacity compared to fully wrapped beams. It was also found that both wrapping schemes were fully effective in restoring the beams' strength for the lower level of damage. However, as the damage increased the strengthening became less effective.

关键词： Concrete repair and strengthening Shear Damage Fabric reinforced cementitious mortar Textile reinforced mortar

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Combination of Cement Deep Mixing (CDM) and Steel Sheet Piles for the Cofferdam Used in Construction of Deep Foundation Pit in Soft Ground in the Mekong Delta Coast 6th

Combination of Cement Deep Mixing (CDM) and Steel Sheet Pile...

引用

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

作者： Tao Nguyen Quang Bui The Anh Thanh Vu Cong Tri Mai Cao Natl Univ Civil Engn Fac Coastal & Offshore Engn 55 Giai Phong Hanoi Vietnam Inst Construct Offshore Engn 55 Giai Phong Hanoi Vietnam

ISBN: (纸本)9789811671609;9789811671593

Cofferdam foundation is defined as a temporary structure which is used to prevent soil erosion in the construction area as well as to prevent water from entering the excavated area when excavation is to be done by digging deeper along the river bank or coast. Most of the works such as dams, locks, bridge footings and water intakes of thermal power plants have deep and wide foundation pits leading to very large cofferdam. In fact, the cofferdam for such works are usually made of specialized steel sheet piles and combined with shoring frames. The specialized steel sheet piles are not popular in the market meanwhile the shoring frame reduces the work space and increases the complication of construction works. Based on research and experience from projects in the Mekong Delta, the cofferdam for the deep and wide foundation pits made by combining between soil cement columns with common steel sheet piles is the reasonable solution. This solution not only does not need specialized steel sheet piles but also takes advantage of local materials, moreover, increasing the work space because it does not need a shoring frame. This paper is going to present the cofferdam used in construction of deep and wide foundation pits under the soft soil of the Song Hau thermal power plant by combining cement deep mixing (CDM) with common steel sheet piles.

关键词： Cofferdam Deep and wide foundation pit Soft soil CDM

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Effects of Travel Distance to Acoustic Emission Parameters in Cement-Based Materials 6th

Effects of Travel Distance to Acoustic Emission Parameters i...

引用

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

作者： Tam Nguyen-Tat Hanoi Architectural Univ Fac Civil Engn Hanoi Vietnam

ISBN: (纸本)9789811671609;9789811671593

By definition, Acoustic Emission (AE) signals are elastic waves emitted from any internal sources (micro-cracks, interfacial damage, phase transformation) and which propagate to the sensors. In most cases, the waveforms are attenuated and deformed on their travelling path. Thus, parameters characterizing the waveforms (such as Amplitude, Duration, Rise-time) are also strongly influenced. This effect is stronger when the propagation distance increases as indicated in some recent studies. This result is related to the different of velocities of the wave types (p-wave and s-wave) during the propagation of the wave, then the delay between the second and first wave increases. This creates a longer waveform, with higher Rise-time and Duration. The general result is that sensors which have longer distance from the AE source will produce lower Amplitude and higher RA (Rise-time per Amplitude) value signals. This means that the propagation distance should be incorporated in any damage classification. This study concluded that the RA values increase when the signals propagate through heterogeneous material may lead to a wrong conclusion when using damage classification namely RA method which has been indicated in RILEM TC 212-ACD.

关键词： Acoustic emission Concrete Mortar Damage classification Mode I Mode II Distance Propagation RA value

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Research on the Attractiveness of Informal Public Spaces for the Youth of Hanoi Towards a Livable City. Case Studies from a University Cluster in Hanoi (Vietnam) 6th

Research on the Attractiveness of Informal Public Spaces for...

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

作者： Quynh Hoa Ta Minh Hieu Le Ngoc Tien Vu Hanoi Univ Civil Engn Hanoi Vietnam

ISBN: (纸本)9789811671609;9789811671593

This paper investigates the role and attractiveness of informal public spaces for young people in Vietnamese urban life. In Vietnam, public spaces are officially defined as squares, parks, and flower gardens. The number of these public spaces in most cities inVietnam, especially in Hanoi, is very limited. However, beside the regulated public spaces mentioned above, there are informal used public spaces (IPSs) that attract a large number young people to participate. It is the vibrant and diverse activities in IPSs that create the vitality, unique characters, and attractiveness of a city. It raises a series of question of "What factors make an IPS to be attractive to the youth? What is the role that an ISP plays in promoting social interaction of the youth of Hanoi city?". The case study was conducted by three large universities in Hanoi. Using observational surveys and interviews with IPS's users, the research has revealed that there are four most important factors that contribute to the attractiveness of IPSs for young people: (1) accessibility and connectivity, (2) a variety functions and meaningful activities, (3) comfort and safety, and (4) sociability. The research has proposed some recomendations for spatial management to improve the quality and attractiveness of IPSs towards the liveable city of Hanoi.

关键词： Informal public spaces Hanoi The youth Atractiveness

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Abrasive and Compressive Properties of Concrete Containing Different Contents of Fine Artificial Sand 6th

Abrasive and Compressive Properties of Concrete Containing D...

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

作者： Duc-Trong Nguyen Duy-Liem Nguyen Univ Transport & Commun Campus Ho Chi Minh City450-451 Le Van Viet St Thu Duc City Vietnam Ho Chi Minh City Univ Technol & Educ Fac Civil Engn 01 Vo Van Ngan St Ho Chi Minh City Vietnam

ISBN: (纸本)9789811671609;9789811671593

Using artificial sand to replace natural sand in making concrete is a useful solution for minimizing environmental impact in Southern Vietnam. This investigation focuses the dependence of abrasive and compressive properties of concretes, which is applied for road pavement, upon different contents of fine artificial sand. The contents of fine artificial sand were changed as follows: 0% (Type 1), 5% (Type 2), 10% (Type 3), 15% (Type 4) and 20% total of artificial sand (Type 5). The total of coarse artificial sand (size >= 0.14 mm) and fine artificial sand (size < 0.14 mm) in the concrete composition was fixed in weight. The experimental result provides that: Type 3 generated the highest compressive strength and elastic modulus whereas Type 2 produced the lowest abrasion coefficient, i.e., the best performance in abrasive resistance.

关键词： Artificial sand Crushed stone Abrasion Elastic modulus Compressive strength

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Study on Surface Deformation Model Induced by Shield Tunneling Based on Random Field Theory 8th

Study on Surface Deformation Model Induced by Shield Tunneli...

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8th International Conference on civil engineering (ICCE)

作者： Li, Jianbin Huang, Junguang Tong, Huawei Zhang, Shankai Guangzhou MTR Design Acad Co Ltd 3 TIYU Dongheng StTIYU East Rd Guangzhou Peoples R China Guangzhou Univ Sch Civil Engn 230 Waihuan West Rd Guangzhou Peoples R China Huaiyin Normal Univ Sch Urban & Environm Sci 111 Changjiang West Rd Huaian Peoples R China

ISBN: (纸本)9789811912603;9789811912597

Based on the shield tunnel engineering in weathered granite stratum in Xiamen, Stochastic calculations, by combining the random field theory and the finite difference analysis together with Monte Carlo simulation, are used to carry out the change law of the characteristics of surface deformation curve and surface deformation model. Results show that with the increase of the vertical scales of fluctuation, the decrease of the transverse scales of fluctuation or the increase of the coefficient of variation, the low peak distribution characteristics of the location of the maximum surface settlement induced by shield tunneling become more obvious, and the randomness and chaos of the shape of surface deformation curve gradually increase. The diversity of surface deformation model is affected by parameter correlation and randomness. Under the condition of small transverse scales of fluctuation and large vertical scales of fluctuation, the sensitivity of coefficient of variation to surface deformation mode is limited.

关键词： Shield tunnel engineering Surface deformation model Random field theory Monte Carlo simulation Distribution characteristics

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