Civil and Environmental Engineering Commons^™

Traffic Conflict Analysis Of Multila Neexpressway Based On Simulation, Ceng Yuekai, Zhou Tao, Chen Yazhen

Journal of China & Foreign Highway

In order to prevent traffic accidents on multi-lane expressways, the VISSIM traffic simulation model was established based on three types of multi-lane traffic conflicts: mixed passenger and cargo type, separated passenger and cargo type, and separated main and auxiliary type. SSAM software was used to obtain traffic conflict data, and the form, quantity, and location of the conflicts were analyzed. The results show that traffic conflicts are the most under the mixed passenger and cargo type, which are mainly distributed in the upper 100 m range of the innermost lane, outermost lane, and deceleration lane. The traffic conflicts under the …

Risk Analysis Of Highway Nighttime Maintenance Operation Based On Sem, Fan Jinhua, Zou Leping, Qi Shaoren, Tian Zhen

Journal of China & Foreign Highway

In order to analyze the factors affecting the risk of nighttime expressway maintenance operation and quantitatively assess the degree of influence of various factors on the risk of nighttime maintenance operation, this paper extracted five first-level indicators and 36 second-level indicators that affect the risk of operation through literature review, accident data, and questionnaire survey and built an evaluation system. The first-order and second-order confirmatory factor analysis models were constructed by using a structural equation model (SEM) based on 343 questionnaires of the nighttime maintenance operation risks. The results show that the driver factor has the greatest effect on the …

Study On Effectiveness Evaluation Method Of Expressway Drainage System In Rainy Area, Luo Datian, Li Jiayi, Zou Jingrong

Journal of China & Foreign Highway

In order to comprehensively evaluate the effectiveness of expressway drainage systems in rainy areas and comprehensively analyze the factors affecting the effectiveness of drainage systems, this paper took the perfection of drainage system, stability of drainage facilities, and road traffic safety as the first-level evaluation index and six kinds of influencing factors such as the degree of integrity as the second-level index, and it put forward the evaluation criteria of the effectiveness of expressway drainage system in rainy areas. The fuzzy comprehensive evaluation method was used to determine the membership degree of expert scoring through the trapezoid membership function, and …

Research On Crack And Permeability Characteristics Of Cement ⁃Modified Expansive Soil Under Dry ⁃Wet Cycles, Bao Guiyong, Xu Yangshaojun, Jiang Zhijie, Rong Hongliu, Wang Jinlong

Journal of China & Foreign Highway

In order to study the engineering permeability characteristics of cement-modified expansive soil under dry and wet cycles, the mix ratio of cement-modified expansive soil was designed, and the orthogonal design test method was adopted. Image analysis software PACS, unconfined compressive strength test, and laboratory permeability test were used to study the crack development, strength attenuation characteristics, and permeability changes of cement-modified expansive soil under dry and wet cycle conditions. The results show that soil permeability and strength are greatly affected by the number of dry and wet cycles. Under the condition of dry and wet cycles, the moisture content of …

Digital Challenges And Opportunities Of Addressing On-Site Productivity And Safety On Construction Job Sites: An International Perspective, Ahmed Hassan, Ankur Mitra, Mark Mulville, Alan Hore

Conference papers

The slow pace of digital transformation in construction remains an impediment to the industry’s evolution. Despite rapid developments in digital technologies, the vast bulk of data generated on construction job sites remains underutilised due to the limited use of real-time data capture. The diffusion of digital solutions in construction depends on successfully capturing critical real-time data that can inform and contribute to more productive work patterns and safer job sites. Nevertheless, the construction industry’s fragmented nature has segregated the digital solutions offered by technology providers from the volatile challenges facing on-site construction practitioners.

This paper will present the early development …

Public Sector Bim Adoption: Development And Evaluation Of Government Policy Interventions: A Systematic Literature Review, Shiyao Kuang, Alan Hore, Ahmed Hassan, Barry Mcauley, Roger West

Conference Papers

Rapid technological advancements in the Architecture, Engineering and Construction (AEC) sector have provided a significant opportunity for improving the industry's efficiency, performance and sustainability. Building Information Modelling (BIM) is an innovative approach to information management in construction that provides a structured methodology for storing and analysing building information exchanged between project stakeholders. However, successful interventions and supports introduced by the public sector in accelerating BIM adoption can be seen through BIM mandates, promotion of information management ISO standards, guidance, funding and procurement integration. In this study, a systematic literature review is adopted to identify BIM policy interventions. The study aims …

Residential Building Flood Risk Assessment And The Benefits Of Home Elevation, Ayat Al Assi

LSU Doctoral Dissertations

Evaluating flood risk is an essential component of understanding and increasing community resilience. A robust approach for quantifying flood risk in terms of average annual loss (AAL) in dollars is needed to provide valuable information for stakeholder decision-making inside and outside the special flood hazard area (SFHA, which corresponds to the 100-year floodplain). To further inform flood mitigation strategies, quantifying flood risk reduction with home elevation above an initial first-floor height (FFH₀) and the cost effectiveness of federal mitigation assistance for elevation are important steps to enhance awareness of the effect of elevation in reducing flood risk. …

Development Of Reduced Cementitious Materials Concrete (Rcmc) Mixtures For Bridge Decks And Rails, Soumitra Das

Department of Construction Engineering and Management: Dissertations, Theses, and Student Research

Right after construction, drying shrinkage of restrained concrete bridge decks and rails causes early-age cracking that eventually leads to delamination and spalling of concrete due to insertion of water and chemicals, and corrosion of reinforcing steel. The main objective of this research is to control early-age shrinkage cracking by reducing cementitious material content in the bridge deck and rail concrete mixtures. Several reduced cementitious materials concrete (RCMC) mixtures were developed by optimizing aggregate particle packing and conducting overall performance evaluation. This evaluation was carried out in three phases: The first phase investigated the feasibility of new RCMC mixtures by testing …

Construction Semantics And Generative Pre-Trained Transformer (Gpt) Language Models, Ankur Mitra, Ahmed Hassan, Mark Mulville

Articles

The article explores the impact of ChatGPT, a powerful language model developed by OpenAI, on the construction industry. ChatGPT, with its ability to provide contextually accurate responses to a wide range of queries, has the potential to enhance safety, scheduling, and knowledge dissemination in construction. While it shows promise in tasks like hazard recognition and project scheduling, the article emphasizes the need for cautious optimism and human oversight. The construction industry could benefit from ChatGPT's digital assistance to boost productivity and address skills shortages, but it is essential to recognize the value of human expertise alongside AI advancements.

Building Services Engineering July/August 2023

Building Services Engineering

No abstract provided.

Mechanical And Durability Properties Of Fly Ash Geopolymer Concrete – A Review, Ali Shebli, Jamal Khatib, Adel Elkordi

BAU Journal - Science and Technology

Geopolymers have emerged as a promising alternative for Ordinary portland cement (OPC) in construction industry, due to their potential to minimize the emissions of carbon dioxide (CO₂) and improve the efficiency of waste recycling. This paper aims to study the fresh and hardened properties of fly ash geopolymer concrete (GPC), as well as to review the raw materials used in the production of geopolymers. Several factors impact the mechanical and durability properties of fly ash GPC, including the specific type of fly ash utilized, the curing temperature, the alkaline activator (AA) concentration, and the type of AA used. …

Construction And Preliminary Application Of The Carbon-Based Spatial Governance Performance Evaluation System ——Taking Zhejiang Province As An Example, Lin Qu, Ganlin Xia, Cunkuan Bao Prof.

CSID Journal of Infrastructure Development

Carbon is generated through human socio-economic activities, with territorial space serving as the medium for these activities. Variations in spatial governance result in differences in the scale, intensity and efficiency of social and economic activities, as well as energy and resource consumption and carbon emissions across diverse functional spaces. Consequently, spatial governance performance should be evaluated using carbon-related indicators. This study initially established a theoretical model for assessing spatial governance performance based on carbon and an evaluation method encompassing three dimensions or indices "level-progress-gap". Zhejiang Province and its 11 prefecture-level cities were selected as the research area for preliminary application …

Optimizing Repayment Strategies For Egyptian Construction Companies With Multiple Loans, Moataz Elkady

Theses and Dissertations

Optimizing Repayment Strategies for Egyptian Construction Companies with Multiple Loans is of utmost importance to efficiently allocate monthly income for loan repayment. The conventional practice of paying the minimum balance due each month leads to increased interest charges and prolonged repayment periods. In response, this research proposes a model for multiple loan repayment that considers the computational complexity involved.

The model is built on the foundation of mixed integer linear programming and aims to establish an optimal repayment schedule by minimizing the total cash required to repay the loans, prioritizing the repayment of loans before personal expenses. The implementation of …

Developing Sustainable Smart Cities To Improve Citizen's Quality Of Life And Well-Being, Mohammed Ali Berawi, Mustika Sari, Perdana Miraj

CSID Journal of Infrastructure Development

In the wake of urbanization and environmental challenges, cities nowadays face multiple issues related to uncontrolled urban growth, insufficient public infrastructure, and inadequate citizen participation in the management of public affairs. Sustainable urban development cannot be achieved without addressing these challenges, necessitating a paradigm shift in urban space management. Therefore, urban development needs to shift traditional concepts and focus on incorporating smart and environmentally friendly practices that allow cities to adapt and implement intelligent solutions to meet the needs of their citizens while continuing to protect the environment.

To achieve sustainability, cities should prioritize a balance between economic activity, population …

Gender Analysis Of Sustainable Housing Choices Of Rental Household Heads In Abuja Municipal Council, Nigeria, Amos Chom Haruna, Stephen Mukiibi, Assumpta Nnaggenda-Musana

CSID Journal of Infrastructure Development

Households' income and other concerns constitute important sustainable housing choices factors that play vital roles in influencing rental housing affordability decisions. The study determined both male and female households can make economic, social, and environmental housing choices to meet their affordable rental needs. A cross-sectional survey was conducted, and a questionnaire was administered to a sample of 285 households obtained from a random sampling of 450 households living in private rental housing in Trademore estate in the Lugbe district of Abuja. Among the 285 households, 226 were household heads representing 79.3% of the respondents' households. The household heads consist of …

People-Centric And Inclusive Approach To Planning Of Smart Cities, Olli Jakonen

CSID Journal of Infrastructure Development

The smart city continues from intelligent, creative, and sustainable urban development imaginaries and started as a technologically oriented urban development framework. Since its conception, debates between academics, planning practitioners, and private firms have expanded and questioned original notions of ‘smart’ to consider people-centeredness, participation, and inclusion themes broadly. These discussions in smart cities have pointed to a need to question and revise many of the aims, approaches, and methods related to smart urban development. This review asks what elements and factors could be required for a city to be considered smart and people centric. The participatory design enabled by digital …

Evaluating Insurance Funds As A Financing Source For Infrastructure Development: A Case Study Of Indonesia, Mohammed Ali Berawi, Suyono Dikun, Ristu Bintoro, Mustika Sari, Suci Indah Susilowati

CSID Journal of Infrastructure Development

There is a funding deficit that cannot be covered by relying solely on government money to build Indonesia’s Infrastructure; consequently, additional sources of financing are engaging the private sector to fill the gap. Insurance funds are an alternative funding source in many countries, although their application is still at an early stage. By assessing the risks faced by insurance companies involved in infrastructure investment, this paper attempts to evaluate the use of insurance money as an alternative funding source for infrastructure investment in Indonesia. The analytical hierarchical process (AHP) technique was used in the quantitative methodology of this study to …

Empowerment Of Increasing Economic Resilience Post Covid-19 Janjang Wulung Village Community Through Creative Economic Village Planning, Alvian Wardhana, Muhammad Ramayuda, Faza Farhan Muhammad, Acyuta Putri Nariswari, Salsa Dwi Cahya Arifin, Garin Ardi Wicaksono, Dani Rizky Dianafi, Muhammad Ivan Riyandhika Saad Psf

CSID Journal of Infrastructure Development

Janjang Wulung Village is one of seven villages located at a highland of 593.73 meters above sea level in Puspo District, Pasuruan Regency, East Java. Janjang Wulung Village has natural resource potential from coffee, apples, avocados, and forest products supported by the plantation area, reaching 280.1 and farmers of 1,072 people. The livestock sector is also one of the superior productions in Janjang Wulung Village, with each household having 3-6 dairy cattle with a population of 602 people who work as breeders. However, the condition of COVID-19 limiting social activities resulted in a 20% to 40% decrease in income. So, …

An Assessment Of Urban Change And Its Drivers In Suleja Local Government Area Of Niger State, Nigeria, Bamiji Michael Adeleye, Kenneth Ssemwogerere, Paul Isolo Mukwaya, Amin Tamale Kiggundu, Fredrick Omolo-Okalebo, Lydia Mazzi Kayondo

CSID Journal of Infrastructure Development

The knowledge of urban change is critical to the management and planning of urban areas. Robust geospatial technologies have increasingly enhanced our understanding of urban change. This paper employs remote sensing and GIS data from the earth explorer data archive to assess the character and pattern of urban change in Suleja Local Government Area (Niger State in Nigeria) and its drives from 1987 to 2019. The nature and character of urban change are examined from the lens of the urban intensity index and the urban land use/cover change. Data from the geospatial techniques were corroborated with secondary data from the …

Automated Reinforcement In Construction 3d Printing: An Investigation Of Mechanical And Macrostructural Performance Of Reinforced 3d-Printed Structures, Hassan Ahmed

LSU Master's Theses

Conventional construction with steel reinforcement is widely accepted and utilized worldwide for its proven strength, durability, design flexibility, cost-effectiveness, and due to available standards and design codes. Integration of reinforcement in construction 3D printing, however, presents multi-faceted challenges that may influence the structural properties of printed components and have hindered the widespread adoption of reinforced 3D-printed structures. This study explored two complementary reinforcement techniques, namely, steel fibers and threaded reinforcement, to reinforce 3D-printed structures. This study explored both the fresh and hardened properties of 3D-printed mixtures that contain very high steel fiber dosages of up to 2.5% by volume. Additionally, …

Resources Based Planning Framework For Infrastructure Maintenance And Rehabilitation Projects, Heba Gad

Theses and Dissertations

Infrastructure maintenance and rehabilitation projects involve activities scattered over a large geographical area (e.g., scattered road segments maintenance, telecom towers maintenance program, etc.). Planning such projects require a resource-based approach that accounts for the implications of resource mobility between activities’ locations in terms of time & cost. Existing scheduling techniques fall short of addressing the unique challenges of the scattered nature of these projects in combination with organization's limited resources availability. To address this need, this research presents a resources-based planning framework for infrastructure maintenance and rehabilitation scattered projects with the objective of enhancing resources utilization achieving time and cost …

Influence Of Organizational Culture And Leadership Style On Disputes In Construction Projects – A Contractor’S Perspective, Omneya Nader Mekhaimer

Theses and Dissertations

Over the recent decades, studies on organizational culture and leadership practices have gained global attention across business management literature given their implicit influence on the organization’s success. However, very few studies tackled these practices in the construction industry research especially in Egypt. Unlike other industries, the construction industry is known to be a complex, dynamic, and adversarial industry sector due to its project-oriented nature where various stakeholders are involved and each have their own objectives. Consequently, construction disputes are inevitable to occur whereby previous studies revealed that the level of disputes have propagated throughout the years.

This research aims to …

Spatial Autocorrelation Analysis For Construction Sites, Raghda Moharram

Theses and Dissertations

This study investigates the usefulness of spatial autocorrelation analysis in construction sites. The objective is to provide construction managers with insights into the site's performance, identify potential areas for improvement, and ultimately lead to cost and time savings and improved project quality. To achieve this objective, the study identifies significant spatial autocorrelation variables for various applications in construction and analyzes their impact on the site's efficiency and potential problems.

The potential applications where spatial autocorrelation analysis could be useful were identified, including schedules, progress, earned value measures, safety incidents, workers' densities, equipment densities, energy expenditure, and quality non-conformity. A framework …

Recent Developments In Timber Design & Its Impact On Carbon Emissions, Raquel Jackson

Spectra Undergraduate Research Journal

This paper explores recent developments in timber building designs and its potential towards reducing carbon emissions. Carbon dioxide emissions are a growing issue worldwide as urbanization and industrialization continues to increase. The rising concentration of carbon dioxide emissions pose significant concerns towards public welfare and environmental health. Despite current methods to reduce greenhouse gasses, carbon emissions remain difficult to reduce from steel and concrete industries. Increasing timber use in building design is a possible solution. Increasing more timber in building design can help reduce carbon emissions due to the carbon-absorbing properties of the construction material. Timber as a construction material …

Toward Low Carbon Footprint And Lightweight Masonry Alkali-Activated Material, Zina Ebrahim, Mohammad Mastali, Marc Maguire

Durham School of Architectural Engineering and Construction: Faculty Publications

The portland cement concrete industry and the masonry industry are undergoing changes in response to skilled labor shortages and concerns over climate and pollution. There may be interest from parts of the industry in lower carbon footprint and lightweight masonry products. Toward this aim, the use of hemp shiv--the woody core of the hemp plant--in alkali-activated concrete was investigated herein and shown to have a wide range of impacts on the hardened state characteristics of a material suitable for structural concrete masonry units (CMUs) in accordance with ASTM C90 requirements. Hemp shiv is well known for its use in hempcrete, …

Developments In Construction Workers’ Compensation Insurance With The Use Of Biometrics, Kobe Tooch

Construction Management

Construction insurance, especially that of workers’ compensation, is vital for the protection of general contractors, but it comes at a high cost and limits their control over contract terms. Biometric devices, such as heart rate monitors and motion capture, have the potential to revolutionize the industry by reducing construction insurance premiums. Heart rate monitors can provide real-time data on workers' physical activity and health, while motion capture analyzes movements to identify unsafe movement patterns performed by workers. By monitoring workers' biometrics, construction companies can ensure their safety, prevent hazards, and implement targeted training programs. This personalized data can lead to …

French Drain Project At Woods Humane Society, Thomas Douglas Collins

Construction Management

The Woods Humane Society is a prominent animal care facility that aims to rehabilitate, rescue, and assist in the adoption of dogs and cats in the greater San Luis Obispo area. The property contains multiple dog playpen areas which consist of a concrete slab surrounded by a chain link fence, designed for the animals to have an open space to run around throughout the day. Employees are required to hose down the slab hourly to maintain a clean environment for the animals. When employees hose down the playpen areas, a considerable amount of water runs off the slab and into …

The Center For Centering Dome, Olek Piechaczek, Ryan M. Scharf

Architectural Engineering

The Center for Centering seeks to create a large-scale healing center, conducive to individual centering of the mind and body. This mobile installation provides a relaxing, enclosed space while still maintaining a connection to the outdoors. The clients liked the idea of having a pop-up installation that could be easily set up as a touring display. With a deadline for installation looming in June 2022, a team of students had five months to design and manufacture the structure.

In winter 2022, the students developed custom geometry to minimize the number of individual parts and built a ¼ scale model of …

Tandem Crane Lifts Of Long Span Ppcgs Case Study, Giovana Sousa

Construction Management

The goal of this research is to compile the data from tandem crane lifts, specifically of long span girders, to determine the proper configuration for this type of work. There have been numerous failed attempts at lifting long span girders, and these failures are all unique. Much of the findings until recently have tended to be job-specific and never became widely available for public knowledge. In learning about these cases and understanding the reasons for these failures, I hope to provide concise information so that future people can avoid repeating the same mistakes. The objective is to provide insight on …

Pcra-Icra Pre-Construction Risk Assessment/Infection Control Risk Assessment Course, Devin Alan Deiranieh

Construction Management

The Preconstruction Risk Assessment and Infection Control Risk Assessment (PCRA/ICRA) course is a collaboration between Cal Poly San Luis Obispo’s Construction Management Department, Cal Poly’s California Center for Construction Education, Green Advantage, LLC and Thomas Kommer, J.D. The goal is to create a certification course in which industry professionals become certified, signifying their knowledge and understanding of PCRA/ICRA practices associated with construction in the environment of patient care. The project began with the PCRA/ICRA manual authored by Stellar Performance, LLC. Working with Nicholas Schorno, the author developed the learning material for the course. The learning material consists of power point …