Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)最新文献

{"title":"Preventive Approach to Unsubstantiated Claims and Disputes in the UK Construction Industry","authors":"A. Nosheen, A. Arewa, Hafiz Muhammad Azeem Akhtar","doi":"10.29117/cic.2020.0014","DOIUrl":"https://doi.org/10.29117/cic.2020.0014","url":null,"abstract":"Globally, claims and disputes are an unfortunate reality in construction projects. Recent statistics reveal that construction claims in the UK increased by 21% in 2018 compared to other countries such as India (8%), Mexico (3%), Ireland (2%), and Cyprus (2%). Though, construction industry is known for array of standard forms of contract and administrative tendencies; unsubstantiated claims and chronic disputes remain prevalent in the sector. Yet, there is little research on preventive approach to unsubstantiated claims that ultimately lead to disputes. The study advocates the use of Systematic and Technical Appraisal (STA) to prevent unsubstantiated claims and disputes in the construction industry. The study research method is based on qualitative research technique and use of case studies. The research question is: does systematic and technical appraisal of construction claims help prevent unsubstantiated claims and disputes in the UK construction industry? The study population sample is drawn from experienced industry stakeholders including clients, contractors, consultants, experienced quantity surveyors and cost managers in addition to use of construction case studies. Initial findings reveal that claim management processes in the construction sector are far-off from perfection. Other findings reveal that robust systematic and technical claim appraisal process has potential to prevent unsubstantiated claims; which in most cases lead to disputes. The study is part of an on-going PhD study to seek to develop an effective claim management system for the UK construction industry.","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127228701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unfair Payment Issues in Construction: Re-thinking Alternative Payment Method for Tier-1 Contractors to Subcontractors","authors":"Laura Lazaro Peter Swai, A. Arewa, Rex Asibuodu Ugulu","doi":"10.29117/CIC.2020.0012","DOIUrl":"https://doi.org/10.29117/CIC.2020.0012","url":null,"abstract":"Recent statistics reveal substantial increase in late payments cases from 18% to 27%; with over £30 billion unpaid invoices to UK contractors. Furthermore, 82% of overdue invoices are monies owed to subcontractor by tier-1 main contractors. Indeed, tier-1 contractors are deemed to be the main elephant in the room despite various contractual, government and private initiatives designed to curb late payment menace. Yet, there is little research concerning use of Alternative Payment Method (APM) to leverage tier-1 contractors paying subcontractors’ invoices promptly. The aim of this study is to assess the use APM to enhance pragmatic and sustainable payment practices between tier-1 contractors and subbies. The research question is: what are the industry specific factors that influences unfair payment practices and how can alternative payment method help to leverage fair payments to subbies? The study adopted sequential exploratory design type of mixed method supported by questionnaire and structured interviews. The study population are drawn from experienced industry stakeholders including clients, contractors, designers, professionals in addition to use of computer simulation to validate proposed APM model. Initial findings reveal an optimism bias tendency of most subcontractors agreeing to lengthened and unfair payments terms induced by Tier 1 contractors. The study identified over five industry and business specific influential factors that encourages tier-1 contractors to clinch to unpropitious late payment practices. In specific terms, there are overwhelming evidences that APM has significant potential to minimize late payment in the UK construction industry if there is political, business and legislative will to implement the model.","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130636693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-Pavement Fiber Bragg Grating Sensor for Vehicle Counting","authors":"Mu'ath Al-Tarawneh, Ying Huang","doi":"10.29117/cic.2020.0052","DOIUrl":"https://doi.org/10.29117/cic.2020.0052","url":null,"abstract":"Traffic volume studies are conducted to determine the number, movements, and classifications of roadway vehicles at a given location and period. Typically, there are two methods for conducting traffic volume studies: manual and automatic counting. When manual counting is used, a person records the traffic volume on the site or alternatively from video recordings and this estimate can have a large margin of error. Automatic counting is based on measurement technologies, including pneumatic road tubes, inductive loops, infrared, microwave Doppler/radar, passive acoustic, video image detection, and Bluetooth devices. However, they are costly to install and have various limitations, such as high maintenance cost, availability of power source, and dependence on surrounding environment. Currently, weigh-in-motion (WIM) technology has become popular for automatic vehicle counting. In this paper, a three-dimensional glass fiber-reinforced polymer packaged fiber Bragg grating sensor (3-D GFRP-FBG) is introduced for in-pavement vehicle counting. The 3D GFRP-FBG sensor was installed on I-94 freeway, at MnROAD facility, Minnesota. When a vehicle passes over the road, the pavement produces strain signals that are picked up by wavelength changes. These strain peaks can be tracked to achieve vehicle counting. The sensors were laid out 9 feet from the road centerline with 16 feet distance between them to detect all the vehicles travelling on the right side of the road. The feasibility tests show the ability of the sensors to detect vehicles from small cars to semi tractor-trailer. For a 250-second period, the sensor detected 23 vehicles, with a total of 69 axles.","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131714612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel Method for Assessing Moisture Damage in Asphalt Mixtures","authors":"M. Fakhreddine, G. Chehab, Z. A. B. A. Masri, Mohamad G. Abiad","doi":"10.29117/cic.2020.0061","DOIUrl":"https://doi.org/10.29117/cic.2020.0061","url":null,"abstract":"Moisture damage is a major cause of early pavement deterioration and often accelerates other distresses such as rutting, fatigue cracking, and raveling. Water infiltrates into the pavement structure through the cracks and air voids and weakens the adhesive bond between the binder and the aggregates as well as the cohesive bond between the binder particles. Several tests have been adopted to test for moisture susceptibility, most commonly the Modified Lottman (AASHTO, T283) and the Hamburg Wheel Tracking Device (AASHTO, T32404), however, these tests correlate poorly with field results and do not properly replicate the conditions which a pavement structure experiences in the field. Also, the mechanism which determines the mode of failure due to moisture damage, being either adhesive or cohesive, remains largely not understood, and the research tackling this issue is very scarce. The objective of this study is to introduce a new testing procedure based on the pull-off approach and study the factors which influence the mode of failure of the samples, such as the asphalt film thickness and loading rate.","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122132662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unique Structural Design and Construction Challenges for Al Bustan South Project in Qatar","authors":"Anshuman Ganguli, A. Kara","doi":"10.29117/cic.2020.0020","DOIUrl":"https://doi.org/10.29117/cic.2020.0020","url":null,"abstract":"The Al Bustan Street South (ABS) Expressway Project features the longest dual carriageway bridges in Qatar spanning 2.6 km each, with a minimum of four lanes in each direction from south of Al Waab Street to south of Rayyan Road. These twin mainline bridges carry the ABS Expressway forming a three-level interchange at Al Waab Street and two-level crossings at Al Rasheeda Street and Snay Bu Hasa. The Al Waab Interchange consists of multiple structures; namely, the mainline bridges at Level +1, the West-South directional ramp at Level +2, and the East-North directional ramp at Level +2. In addition, there are six other on/off ramp structures that tie into the mainline bridges at various locations. While the current construction maintains Al Waab Street at Level 0, in its ultimate configuration, Al Waab Street will contain an underpass at Level -1, resulting in Level +4 interchange. This underpass due to its proximity to the bridge supports requires unique design considering future constructability. The ABS Expressway is part of the prestigious Sabah Al Ahmad Corridor which once constructed will provide a separate north to south route from the Landmark Mall to Hamad International Airport. The appearance of the bridges along the Sabah Al Ahmad Corridor will contain aesthetically pleasing cladding attached to the parapets with artificial green walls running down select piers and MSE Walls. This paper summarizes recent developments in the design and build for the future underpass, which requires special attention in the bridge design while also considering aesthetic features.","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117208240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Vehicle Restraint Systems (VRSs) in the State of Qatar: A Case Study from Northern Roads","authors":"D. Muley, S. Tahmasseby, B. W. Wink, F. Tarlochan","doi":"10.29117/cic.2020.0058","DOIUrl":"https://doi.org/10.29117/cic.2020.0058","url":null,"abstract":"Recent developments within Infrastructural Road Safety and especially in the Sector of Vehicle Restraint Systems (VRS) have enabled Transport Authorities to significantly reduce road fatalities and severe injuries. Predominantly, two authorities have established leading guidelines for VRS installation and maintenance, the European Union (EU) and the United States. The guidelines for the State of Qatar are based on these two sources. This technical paper briefly reviews the aforementioned guidelines, highlights the additional items in the EU guidelines, and explains the evolution of the State of Qatar guidelines accordingly. Moreover, this paper explains the application of VRS guidelines to the road network of the State of Qatar by presenting evidences from a recent site visit to the highways/expressways in the Northern Part of the Qatari Road Network. The outcomes of the site visit mainly highlight the typical steel VRS applied alongside the road (lateral as well as in central reserve, median), crash cushions, and various terminal systems. The paper is aiming to support designers, planners, auditors, contractors and installers to improve road safety from the VRS point of view.","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128789660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Study of Four Bolts End-Plate Joint Behaviour for Robustness Assessment","authors":"Bashir Saleh","doi":"10.29117/cic.2020.0132","DOIUrl":"https://doi.org/10.29117/cic.2020.0132","url":null,"abstract":"The paper presents new studies on numerical modeling (FEM) for beam-to-column behavior under sagging and hogging bending moment when the framework exposed to service and unexpected loads that may cause a column loss scenario. This investigation is focused on four bolts end-plate joints with 10 mm thickness which proved experimentally that have more ductility behavior than other end-plates joints (6, 8 bolts), in spite of its weakness to transfer the unexpected loads from the initial state to a residual state of the stable equilibrium leads to a failure of limited floor area to adjacent joints that tested experimentally around time from now. FEM technique used in this research is an extension of the previous technique (B. SALEH thesis) and is characterized by the use of a more sophisticated technique than the previous, discovered from the result of continuous research and the use of all the options available in the new version of commercial ABAQUS/CAD software. The elements are designed using multiple layers of specific elements of brick arranged in such a way that the mesh nodes of the tiles should coincide with certain layers with the top of the shear inlay and in line with reinforcement. Not as the former study that used, thick shell elements to model the reinforced concrete slab, with total negligence of reinforcing steel and bolts between the slap and the beam. This investigation is very complex because of highly nonlinear effects associated with the prediction of joint performance, such as structural imperfections, huge displacements and large rotations, inelastic properties of steel and concrete, bonding effects between steel and concrete, friction between end-plate and column flange and focus on the slip between concrete and structural steel, among others which is the most difficult modelling application. The paper addresses all these problems in addition to an evaluation of the joint with four bolts end-plate and provides recommendations for new computer simulation techniques (FEM). With these satisfactory results, this technique can be used to solve many problems and difficulties facing the steel and steel-concrete composite frames and due to extraordinary events (explosions and hurricanes).","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124865589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Key Lessons Learnt from Stakeholder Management in Design and Build Projects in Qatar","authors":"Larno L. Meyer, A. Kara","doi":"10.29117/cic.2020.0019","DOIUrl":"https://doi.org/10.29117/cic.2020.0019","url":null,"abstract":"Stakeholders in the construction industry require accurate, reliable and timely information in order to streamline the design and construction of Projects. Design Bid Build or Design and Build contracts need a process for seeking the latest requirements, interests and existing assets of all the stakeholders involved. This to lead and guide the projects to deliver in a timely, cost-effective and safe manner. This paper summarizes the multi-discipline Stakeholder management challenges and their proactive approach during the execution of the Expressway Programme by Public Works Authority, Qatar illustrated by a case study and actual actions from the industry. Various internal surveys have been undertaken to assess the issues to be resolved. Key to managing the time and cost impacts on the construction projects are identifying the needs of stakeholders, stakeholder communication procedures, their requirements, identification of existing assets, expected future requirements and decisions among the stakeholder. Unique and innovation construction procedures are highlighted in order to overcome construction challenges.","PeriodicalId":392016,"journal":{"name":"Proceedings of the International Conference on Civil Infrastructure and Construction (CIC 2020)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114664749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}