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

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Stabilize the Diaphragm Wall by the Method of Anchoring in the Ground in the I-Tower Project in Quy Nhon City, Binh Dinh Province 6th

Stabilize the Diaphragm Wall by the Method of Anchoring in t...

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

作者： Van Giang Nguyen Thanh Hoang Nguyen Thanh Dat Nguyen Ho Chi Minh City Univ Technol HUTECH Ho Chi Minh City Vietnam Project Management Unit I Tower Quy Nhon Binh Dinh Vietnam Ho Chi Minh City Univ Transport Ho Chi Minh City Vietnam

ISBN: (纸本)9789811671609;9789811671593

The I-Tower commercial building high-level tower is constructed in condition: narrow construction ground and unfavorable but not affecting the traffic of the surrounding streets.. Besides, the element with two long, narrow, and deep basements has greatly influenced the optimal construction method and safety. Internal and external risk factors exist, which has set a difficult problem for the foundation design engineer to require savings but absolutely safe and especially not to cause subsidence and damage to adjacent high-rise buildings. This paper presents how to analyze the method of diaphragm wall anchoring in the soil as well as its effectiveness for The I-Tower commercial tower in Quy Nhon City, Binh Dinh Province.

关键词： Diaphragm wall Anchor in the ground Construction of deep excavation holes Lower the water table

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Effects of Random Road Roughness on Dynamic Impact Factor of Cable-Stayed Bridge Subjected to Moving Vehicle 6th

Effects of Random Road Roughness on Dynamic Impact Factor of...

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

作者： Xuan-Toan Nguyen Duy-Thao Nguyen Van-Duc Tran Thi-Kim-Loan Nguyen Univ Sci & Technol Univ Danang Danang City Vietnam Duy Tan Univ Danang City Vietnam

ISBN: (纸本)9789811671609;9789811671593

In this study, a two-dimensional vehicle-bridge dynamic interaction model is presented to analyze the dynamic impact factor of a cable-stayed bridge in service by considering the effect of the random road surface roughness. The bridge system including girder, towers, and cables is discretized by using the finite element method. The common model of random road roughness vertical profiles is applied in the form of a stationary and ergodic Gaussian process in space. Random samples of road roughness vertical profiles are generated with the Monte-Carlo simulation method. A two-dimension vehicle model with 4 degrees of freedom is adopted. Based on the d'Alembert's principle, the coupled equation of motion of cable-stayed bridge and vehicle are established by combining both the bridge and vehicle using the interaction force relationship at the contact point. Solutions of the coupled equation of motion in the time domain are solved using the Runge-Kutta-Merson method. The accuracy of numerical results is validated by field test results of the Pho Nam cable-stayed bridge at Danang city, Vietnam. Additionally, the influences of random road roughness on the dynamic impact factor of the bridge were discussed in detail. The results of the dynamic impact factor study show that bridge design codes currently underestimate the dynamic response of the bridge for moving vehicles under different road surface conditions. The findings of this study can be utilized for future design.

关键词： Dynamic impact factor (DIF) Cable-stayed bridge Moving vehicle Road roughness Vehicle-bridge interaction (VBI) Finite element method

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Experiments and Modelling of Starred Angle Braces 10th

Experiments and Modelling of Starred Angle Braces

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

作者： Herrera, Ricardo Guerrero, Robinson Rodriguez, Maria A. Univ Chile Santiago 8370449 Chile

ISBN: (纸本)9783031038136;9783031038112;9783031038105

A starred angle is a built-up shape composed of two angles joined intermittently by welded plates (stitch plates) at the heels, forming a cross-shaped section. Starred angles braces advantages include simple fabrication, easy installation on the frame, and easier clean up and maintenance. For these reasons, these braces are widely used in steel industrial construction in Chile. However, a number of these braces failed during the 2010 Maule earthquake in Chile either by local buckling, lateral torsional buckling, or connection fracture. These failures, although not yet completely explained, have made engineers steer away from the use of starred angles as braces. Six scaled specimens with the same cross section but different lengths were tested under cyclic loading of increasing amplitude. The failure modes varied depending on the slenderness of the specimen from flexural to flexural-torsional buckling. After several cycles of inelastic displacement, the specimens developed fracture in only one of the angle legs, maintaining significant tensile strength, but low residual compressive strength. No failure on the connections or stitch plates was observed. A numerical model developed by previous research for tubular and I shaped braces was adapted for starred angle braces and calibrated to represent the response of the braces, using the experimental data. This model can be used to study the performance of structural systems that include starred angle braces.

关键词： Braces Buckling Numerical model Cyclic testing

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Application of 4D BIM Simulations for Safety and Schedule Integration of a Reconstruction Project for Oxygen Plant in Steel Works in Korea 6th

Application of 4D BIM Simulations for Safety and Schedule In...

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

作者： Kim, Chae-Yeon Lee, Jae-Sung Roh, Ho-Young Lee, Eul-Bum Pohang Univ Sci & Technol POSTECH Grad Inst Ferrous & Energy Mat Technol GIFT Pohang South Korea

ISBN: (纸本)9789811671609;9789811671593

Since the duration of the reconstruction project of an oxygen plant to replace the about 40-year aging oxygen plant for the "P" company's steel works in Korea needs substantial schedule acceleration to improve the steel plant's overall production efficiency, the plant owner decided to integrate construction schedule and cost for minimum trial and error by adopting pre-simulations with 4D BIM (building information modeling). This case study presents a model for checking the process plan by providing information on construction duration reality-check compared to the construction schedules of previous similar projects in "P" company history before beginning reconstruction of the oxygen plant. It also helps make decisions by simulating the planned schedule to predict potential construction delays and providing prioritized ranks of activities that need to be shortened to reduce duration economically. The 4D BIM-based simulations with Dassault's Delmia, which combines the 3D modeled with Catia and CPM (Critical Path Method) with Enovia, further reflects the safety factors for the construction workers based on the lessons-learned database from the previous similar projects, enable the visualization and management of hazard elements to the schedule planner and safety manages. The system developed through research will be implemented as a full-scale during the reconstruction of the oxygen plant after a pilot test project reported in this paper. When utilizing the result of this study, it is expected that existing plans can be checked through the 4D BIM simulations in advance through PC and mobiles (tablets and smartphones) to reduce risks such as construction delays and safety hazards.

关键词： BIM Safety Schedule Cost Plant Simulation EPC (engineering procurement construction) center dot Project management

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A Critical Look at the Current Status on the Design Regulations for Structural Adhesively Bonded Joints of Fibre Reinforced Polymers 10th

A Critical Look at the Current Status on the Design Regulati...

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

作者： Vallee, Till Gross, Andreas Fraunhofer Inst Mfg Technol & Adv Mat IFAM DE-28359 Bremen Germany

ISBN: (纸本)9783030881665;9783030881658

Adhesive bonding is widely recognised as a key technology in many industries, including in particular where composite materials are in the focus. Contradicting this statement is the fact that adhesively bonded joints do unfortunately all too often not meet the requirements placed on them, resulting in failure during service life. In almost all engineering disciplines, codes and standards effectively regulate the design process. What are the reasons behind the noteworthy singularity of adhesive bonding? Both composites as a materials, and adhesive bonding as a joining technique have been widely investigated at several, if not almost all, levels of complexity. Yet this accumulated knowledge has not diffused into useful codes and standards to safely dimension adhesively bonded joints for composite materials. It is posited that this dichotomy between available and implemented knowledge is mainly due to three reasons: lack of specific qualification of designers regarding the new technology and the sheer extension of specific knowledge required;the attempt to clone "traditional" codes and standard where uniform approaches are sought after;the lack of specification regarding structural verification procedures. These issues have been recognised in other industries, e.g. railway and automotive, and more general solutions were offered that did not mimic traditional forms of coding, but consider adhesive bonding as a process, and not merely a joint. This paper aims at consider a much broader approach to coding, and offers ways out of the current misery of adhesively bonded joints for composite materials in civil engineering.

关键词： Adhesive Bonding Joints Structural Code Standard

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FRP Bridges in the Flanders Region: Experiences from the C-Bridge Project 10th

FRP Bridges in the Flanders Region: Experiences from the C-B...

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

作者： De Corte, Wouter Uyttersprot, Jordi Somers, Robert Univ Ghent Fac Engn & Architecture Dept Struct Engn Valentin Vaerwyckweg 1 B-9000 Ghent Belgium Flemish Govt Div Concrete & Steel Expertise Dept Mobil & Publ Works Koning Albert II Laan 20 Bus 6 B-1000 Brussels Belgium

ISBN: (纸本)9783030881665;9783030881658

Currently, the number of fibre reinforced composite bridges in the Flanders region of Belgium is limited to a handful. These limited achievements are largely due to poor knowledge of clients (public and private), project managers, design engineers and contractors, which makes this option either unknown or still viewed with a certain degree of suspicion. In addition, there are no standards at Belgian or European level for the design of such constructions. The C-bridge project (roadmap into design, guidelines and execution of composite bridges in Flanders) aims to stimulate the design, the realization and the construction of composite bridges in Flanders by providing the necessary knowledge to the construction sector in the most suitable form. This knowledge will allow the awarding authorities and contractors to be able to make informed choices regarding fibre reinforced polymer bridges, but also offer the possibility to various Flemish companies to make the necessary transformation to this new and promising material. The paper presents results from the C-bridge project including a state of the art report, an analysis of the selection, cost determination and project specifications in Flanders, an overview of structural analysis and calculation methods, and a case study related to a recently built fibre reinforced composite bridge in Flanders. The results are helpful for the acceptance of fibre reinforced composite bridges as an alternative to timber, steel or concrete bridges, in Flanders and internationally.

关键词： FRP Bridges Roadmap Case study

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Temperature Distribution and Transmission in Multilayer Porous Asphalt Courses 8th

Temperature Distribution and Transmission in Multilayer Poro...

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8th International Conference on civil engineering (ICCE)

作者： Chen, Hongqing Jiang, Chunfa Su, Yunfei Wang, Xiaowei CCCC SHEC Third Highway Engn CO LTD Xian Peoples R China Xian Univ Architecture & Technol Sch Civil Engn Xian Peoples R China

ISBN: (纸本)9789811912603;9789811912597

The objective of this paper was to investigate the temperature distribution and the law of temperature transmission in multilayer porous asphalt courses. Three types of multilayer porous asphalt courses are designed as the same thickness of actual pavements. In order to achieve this objective, experiments were conducted in an oven with different temperature, and samples were enwrapped with an efficient insulation material except the surface. The final temperature in samples is lower by 5 similar to 10 degrees C than ambient temperature and reduced gradually from top to bottom. The ability of heat transmission is related to the mixture's air void and ambient temperature. The temperature transmission rate in porous asphalt mixture is lower than traditional dense graded asphalt mixture. At last, temperature transmission formulas of porous asphalt mixture are given.

关键词： Porous asphalt mixture Multilayer porous asphalt courses Temperature distribution Temperature transmission Temperature reduction

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Three-Dimensional Characterization of Naturally Corroded Steel-Reinforced Concrete Using Computed Tomography 10th

Three-Dimensional Characterization of Naturally Corroded Ste...

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

作者： Alhusain, Mustafa Quayle, Trevor G. Al-Mayah, Adil Univ Waterloo Dept Mech & Mechatron Engn Waterloo ON Canada King Faisal Univ Dept Mech Engn Al Hufuf Al Ahsa Saudi Arabia Pretium Engn Inc Breslau ON Canada Univ Waterloo Dept Civil & Environm Engn Waterloo ON Canada

ISBN: (纸本)9783030881665;9783030881658

Understanding the corrosion mechanisms of reinforcement is essential for the design and retrofitting of durable concrete structures. Accurate detection of reinforcement corrosion is quite challenging;hence, the potential of a highenergy micro-computed tomography ( mu CT) imaging system is examined here to study the three-dimensional (3D) corrosion distribution and the associated concrete cracking. Little attention has been paid to investigating the natural corrosion of large concrete elements using mu CT;thus, a bulky part of naturally corroded steel-reinforced concrete collected from a 50-year-old building was examined in this study. The obtained mu CT images were processed and reconstructed into a three-dimensional (3D) model. Non-uniform reinforcement corrosion was detected as cracks exposed one side of the reinforcement resulting in excessive corrosion and cracking, yet only minor corrosion and concrete cracking occurred at the protected side of the reinforcement. The volume of the uncorroded portion of the 10M steel rebar was measured to estimate the corrosion level, and it was found that only one-third of its original size remained intact. The corrosion products detected through mu CT were visually compared with the specimen, and an acceptable agreement was observed. However, due to the inhomogeneity of concrete materials and beam-hardening imaging artifacts, some small regions outside the corrosion zones were falsely captured along with the corrosion products. Based on the aforementioned results, it can be concluded that micro-computed tomography (mu CT) has considerable potential for investigating the corrosion and cracking mechanisms of large reinforced concrete elements.

关键词： 3D nondestructive characterization Natural reinforcement corrosion Reinforced concrete X-ray micro-computed tomography

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Use of Steel Slags in Earthworks-Hydraulic Properties of Steel Slags and Granulometrically Modified Steel Slags Under Saturated and Unsaturated Conditions 4th

Use of Steel Slags in Earthworks-Hydraulic Properties of Ste...

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4th International Conference on Transportation Geotechnics (ICTG)

作者： Barka, Elissavet Birle, Emanuel Tech Univ Munich Franz Langinger Str 10 D-81245 Munich Germany

ISBN: (纸本)9783030772383;9783030772376

About 6 million tons of steel slag are generated in Germany every year during the production of steel. About 14% of them is landfilled due to some technically or environmentally relevant properties. Nevertheless, increasing costs for the deposition on landfills make their use in earthworks for transportation infrastructure more and more attractive. The utilization of steel slags in earthworks seems to be promising due to their advantageous mechanical properties but requires the protection of soil and groundwater against possible exposure to leached substances. Several construction methods in earthworks are described in a recommendation (M TS E) of the German Road and Transportation Research Association, where soils/materials with environmentally relevant substances can be used with additional capping systems, and without additional liners if they are of low permeability, respectively. Thus, experimental investigations were carried out to study how the permeability of steel slags could be reduced by the addition of clay powders. In order to analyze the seepage flow through earthworks built of such materials, their saturated and unsaturated hydraulic properties have to be determined. These include the coefficient of permeability k(f), the unsaturated hydraulic conductivity function and the soil-water retention curve, which have been determined carrying out various tests, among others one-dimensional evaporation tests. Based on the experimental results, numerical simulations with the finite element software Seep/W were performed to study the percolation of an embankment section built in a lysimeter. The results showed that the percolation of mixtures of steel slag and clay is low.

关键词： Steel slag Earthworks Hydraulic properties Evaporation experiment Soil water flow Modeling

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The Use of Steel in the Functional-Structural Rehabilitation of the Prince Caracciolo of Avellino Building in Naples 10th

The Use of Steel in the Functional-Structural Rehabilitation...

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

作者： Faggiano, Beatrice Fiorino, Luigi Macillo, Vincenzo Bonelli, Giulia Rossi, Claudio Mazzolani, Federico M. Univ Naples Federico II Dept Struct Engn & Architecture P Le Tecchio 80 I-80125 Naples Italy Bonelli Studio Architettura Via D Cimarosa 37 I-80129 Naples Italy PSE 4 0 Srl Via Martucci 48 I-80121 Naples Italy

ISBN: (纸本)9783031038136;9783031038112;9783031038105

The paper presents the functional and structural rehabilitation of an historical masonry building located in the old town of Naples, which is an UNESCO World Heritage Site. The building was initially built in the 16th century as monastery and in the 17th century it was achieved by the Prince Caracciolo of Avellino family, who made major modifications. The building has a rectangular plan with a length of about 50 m and width of about 10 m. It has 6 stories, one of which is below the street level;the pitched roof reaches a maximum height of about 26 m. Before the renovation intervention the building was very much degraded, presenting widespread cracks in the masonry walls and vaults and deteriorated wooden floors. The rehabilitation was dedicated on one hand to the retrofit of existing vertical and horizontal structures, on the other hand to adapt the building to the new use, as a Foundation of Contemporary Art. The paper briefly describes the state of the construction before the intervention and its recovery and transformation, with particular reference to the structural aspects, highlighting the versatility, compatibility and efficiency of retrofitting solutions based on steel in the masonry built cultural heritage.

关键词： Rehabilitation Historical building Masonry building Steel structures Structural retrofitting Seismic improvement

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