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Articles 241 - 249 of 249
Full-Text Articles in Construction Engineering and Management
Noise Induced Hearing Loss Accountability On Jobsites Within The Construction Industry, Joseph O. Lamphere
Noise Induced Hearing Loss Accountability On Jobsites Within The Construction Industry, Joseph O. Lamphere
Construction Management
Noise induced hearing loss is a major issue on jobsites within the construction industry. Every day workers are exposed to hazardous levels of noise, but they are not being properly managed to mitigate this issue. Workers have misconceptions about the topic, but more surprisingly are sometimes indifferent to the effects; believing hearing loss is inevitable, or it can be cured with a hearing aide. Construction has inherent dangers that workers have to deal with every day. Hearing loss might not be on the top of their lists, but the effects are permanent, and they cannot be cured with a hearing …
A Bim-Database-Integrated System For Evaluating Building Life-Cycle Costs Using A Multi-Parametric Model, Hang Thi Thu Le
A Bim-Database-Integrated System For Evaluating Building Life-Cycle Costs Using A Multi-Parametric Model, Hang Thi Thu Le
Chulalongkorn University Theses and Dissertations (Chula ETD)
Life-cycle cost analysis (LCCA) has become an essential requirement of the sustainable procurement for many construction projects. Conventional building LCCA methods are extremely complex and time-consuming due to repetitive works, numerous required data, scattered data inputs, and various regulatory requirements, which subsequently lead to inaccurate building life-cycle costs (LCC). Building information modeling (BIM) offers a revolutionary information technology, which can overcome the asperities of the conventional building LCCA. This research develops the BIM-database-integrated system for evaluating building life-cycle costs using a multi-parametric model (BIM-BLCC). The BIM-BLCC consists of four interrelated modules. The relational database management module collects and organizes the …
Methodology For Load Rating Double-Tee Girder Bridges, Sandip Rimal
Methodology For Load Rating Double-Tee Girder Bridges, Sandip Rimal
Electronic Theses and Dissertations
The most common type of bridge on South Dakota (SD) local roads is precast prestressed double-tee (DT) girders. More than 700 DT bridges are currently in-service in SD. Structural detailing, aging, traffic volume, and environmental conditions affect the structural performance, integrity, and capacity of DT bridges. When a bridge is affected by one or more of the aforementioned parameters, the estimation of the bridge safe live loads is necessary to ensure the safety of the traveling public and to prevent excessive bridge damage and collapse. Load rating of damaged bridges is challenging mainly because of a lack of information regarding …
การวิเคราะห์ชั้นดินโดยการวิเคราะห์คลื่นผิวดินหลายโหมดแบบย้อนกลับ, ถิรวัฒน์ ซิ้มเล่มกิม
การวิเคราะห์ชั้นดินโดยการวิเคราะห์คลื่นผิวดินหลายโหมดแบบย้อนกลับ, ถิรวัฒน์ ซิ้มเล่มกิม
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยนี้ได้เสนอวิธีการสำรวจชั้นดินด้วยวิธีการตรวจวัดคลื่นผิวดินแบบพาสซีฟแบบใหม่ใช้ชื่อว่า Power of Phase (POP) และการวิเคราะห์แบบย้อนกลับที่คำนึงถึงผลการสั่นไหวของโหมดที่สูงขึ้นของคลื่นผิวดิน การสร้างเส้นโค้งการกระจายของความเร็วคลื่นเฉือนด้วยวิธีการใหม่นี้ไม่จำเป็นต้องหารากของสมการเบสเซลจึงไม่จำเป็นต้องใช้ปริพันธ์เชิงเส้นรอบรูปวงกลมที่มีสมมติฐานว่าทุกจุดบนเส้นรอบรูปวงกลมต้องหาค่าได้ หรือในทางปฏิบัติคือ จำเป็นต้องมีจีโอโฟนเพื่อวัดการเคลื่อนที่ของผิวดินทุกจุดบนเส้นรอบรูปวงกลมเหมือนวิธีการที่ได้รับความนิยมในอดีต เช่น SPAC และ CCA เป็นต้น โดยหลักการการสร้างเส้นโค้งการกระจายด้วยวิธี POP คือการหาความสัมพันธ์ของเฟสของคลื่นผิวดินที่ได้จากการตรวจวัด จึงเป็นผลให้เส้นโค้งการกระจายที่คำนวณได้มีความซับซ้อนในการวิเคราะห์น้อยลงและมีความถูกต้องมากขึ้นในงานวิจัยนี้ผู้วิจัยยังได้พัฒนาวิธีการวิเคราะห์แบบย้อนกลับที่คำนึงถึงผลของการสั่นไหวในโหมดที่สูงขึ้นของคลื่นผิวดิน ซึ่งทำให้สามารถวิเคราะห์ชั้นดินที่ความเร็วคลื่นเฉือนไม่ได้เพิ่มขึ้นตามความลึก ทั้งนี้ผู้วิจัยได้ทำการทวนสอบกระบวนการที่ได้พัฒนาขึ้นกับสัญญาณคลื่นที่สร้างจากแบบจำลองชั้นดินตามระเบียบวิธีไฟไนต์เอลิเมนต์และผลตรวจวัดคลื่นผิวดินในสนามที่มีโครงสร้างพื้นดินแตกต่างกัน ซึ่งพบว่าวิธี POP สามารถคำนวณเส้นโค้งการกระจายได้ใกล้เคียงกับเส้นโค้งการกระจายทางทฤษฎีมากกว่าวิธี SPAC และการวิเคราะห์แบบย้อนกลับที่คำนึงโหมดการสั่นไหวของคลื่นผิวดินโหมดที่สูงขึ้นแสดงแยกแยะโครงสร้างชั้นดินได้ละเอียดกว่าการวิเคราะห์จากการสั่นไหวในโหมดพื้นฐานอย่างเดียว
Advanced Technologies For Efficient Transportation Construction Inspection, Clyde Wesley Newcomer Iv
Advanced Technologies For Efficient Transportation Construction Inspection, Clyde Wesley Newcomer Iv
Theses and Dissertations--Civil Engineering
Collecting load tickets is an example of an antiquated practice that puts inspectors in harm’s way either adjacent to traffic, in close proximity to moving or backing equipment, or at times requires climbing onto trucks to reach tickets. Technology exists to collect this information electronically allowing for safer, efficient inspection methods. Departments of Transportation are charged with inspecting an increasing work load with a diminishing number of inspection staff. Recently, doing more with less has led to the prioritization of inspection activities and resulted in less collection of data and visual inspection on projects. Technology advancements are available to improve …
Risk Management And Practice Alignment For Utility Coordination On Transportation Projects, Roy E. Sturgill Jr.
Risk Management And Practice Alignment For Utility Coordination On Transportation Projects, Roy E. Sturgill Jr.
Theses and Dissertations--Civil Engineering
Utility coordination is an exceedingly complex effort of managing, communicating, and facilitating the avoidance and relocation of utility facilities as needed for highway projects. Utility coordination occurs throughout the design and delivery of a project and best practices are used to make sure this occurs efficiently and in the best interest of the public, who are not only the taxpayers but also the ratepayers. Recent research has attempted to enhance utility location technology and procedures, instill frameworks and tools for utility coordination, and proceduralize risk management relative to utility coordination. However, research attempting to improve various aspects of utility coordination …
Manufacturing Applications Of The One-Dimensional Cutting Stock Problem As A Team Project, Hüseyin Sarper, Nebojsa I. Jaksic
Manufacturing Applications Of The One-Dimensional Cutting Stock Problem As A Team Project, Hüseyin Sarper, Nebojsa I. Jaksic
Electrical & Computer Engineering Faculty Publications
This paper explains the beneficial and practical impact of operations research in two real manufacturing settings. Two manufacturing examples used in student projects were (1) cutting rails (80‘ or 40‘) to manufacture railroad frogs of many sizes and (2) cutting round metal rolls (12‘ to 20‘) to meet customer demands for various lengths of cuts. Student teams in Engineering of Manufacturing Processes and Operations Research courses wrote computer programs. The program first identified all possible patterns that can be cut out of a given stock length. Next, the program created a mathematical model (a text file) as an output. This …
Designing And Testing 3-D Printed Wafer-Box With Embedded Pzt Sensors To Identify The Shape Effect On Energy Harvesting, Ahmad Jami Safayet
Designing And Testing 3-D Printed Wafer-Box With Embedded Pzt Sensors To Identify The Shape Effect On Energy Harvesting, Ahmad Jami Safayet
Electronic Theses and Dissertations
Piezoelectric energy has been recently paid attention in the field of alternative energy. Day by day the traditional energy sources including Coal tar and oils are becoming scarce. People are heading to an alternative energy source to meet the future energy demand. Piezoelectric energy is one of the competitive energy sources compared to the conventional renewable energy sources including solar, wind, and geothermal power and so on. This energy production method bears enormous research potential because it can be used as the roadway for a new method of power generation. This research project aimed to identify which shaped wafer-box produced …
Building Information Modeling (Bim) Impact On Construction Performance, David D. John
Building Information Modeling (Bim) Impact On Construction Performance, David D. John
Electronic Theses and Dissertations
This study is designed to address the need for having a measure for Construction Performance on BIM-assisted construction projects. Through this study a new Construction Key Performance Indicator (CKPI) matrix is identified and created by the author. The CKPI could be used to assess BIM-assisted projects. Utilizing a sequential mixed methodology approach, academic and practitioner perspectives are assessed. A qualitative content analysis and quantitative descriptive analysis based on demographics are conducted to establish a better understanding of BIM and Construction Performance. The academic perspective is used to assess the relevance of BIMM and CKPI indicators, and the practitioner perspective is …