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Cable-stayed Bridges: From Concept to Performance-based Design

為了解決Cable-stayed bridge的問題，作者Shama, Ayman 這樣論述：

Cable-Stayed Bridges: From Concept to Performance-based Design covers the advances in analysis, design, and construction of cable-stayed bridges. The vast development of cable-stayed bridges in the past two decades can be attributed to the advancement of computational methods, materials, and methods

of construction. Cable-stayed bridges have become a supplement of suspension bridges in spans that range from 500 meters to 1000 meters. This book devotes two chapters to the performance-based design method and its application to the seismic design of cable-stayed bridges. Other topics within the t

ext include bridge aerodynamics, cable vibrations, and soil-structure interaction. Dr. Ayman Shama is Director of Seismic Engineering for Louis Berger Long Span Division. He received his MSc and Ph.D. degrees from the State University of New York at Buffalo. He is a registered Professional Enginee

r in New York, California, Florida, Minnesota, Connecticut, and Maryland. He is Fellow of the American Society of Civil Engineers (ASCE) and member of the Earthquake Engineering Research Institute (EERI), Structural Engineering Institute (SEI), Seismological Society of America (SSA), Deep Foundation

Institute, American Segmental Bridge Institute, and International Association for Bridge and Structural Engineering (IABSE).He conducted research that emphasized fracture of steel moment frames during the Northridge earthquake; seismic vulnerability of bridge substructures; structural identificatio

n of long span bridges; ground motion simulation, probabilistic seismic hazard analysis, and soil-structure interaction. His research has been referred to in AASHTO LRFD Design Specifications and Caltrans Design Guidelines.

Cable-stayed bridge進入發燒排行的影片

Automated Vision-based Post-Earthquake Safety Assessment for Bridge Using STF-PointRend and EfficientNetB0

為了解決Cable-stayed bridge的問題，作者Kenneth Harsono 這樣論述：

Structural health monitoring (SHM) on the bridge is important to know the usability of the bridges. However, conventional inspection is labor-intensive and expensive. This method is not suitable for post-earthquake inspections that require speed and consistency. Therefore, this research aims to dev

elop an automated bridge inspection using STF-PointRend and EfficientNetB0. The STF-PointRend consists of two-part, namely symbiotic organism search as a hyper-parameter optimizer and PointRend as semantic segmentation. This model is used to recognize the component and the damage type which will be

used to get the percentage of the damaged component. On the other hand, the EfficientNetB0 uses as the image classifier. The output of this model is used to get the damage level from each component. As a base to determine the safety of the bridge, this study uses the degree of earthquake resistance.

This rating system is based on the DERU method but only considers the structural component. The result shows that STF-PointRend gets a good testing result with the mIoU of 82.67% and 71.42% for component and damage detection. Meanwhile, the EfficientNet got an average F1score of 0.85912 for the tes

ting dataset. For further evaluation, this research uses two minor bridges that suffered catastrophic earthquakes from Palu Earthquake in 2018. The evaluation shows that both bridges need maintenance as soon as possible.

Concrete Segmental Bridges: Theory, Design, and Construction to Aashto LRFD Specifications

為了解決Cable-stayed bridge的問題，作者Huang, Dongzhou,Hu, Bo 這樣論述：

Dongzhou Huang, Ph.D., P.E., isChief Engineer of Atkins North America and President of American Bridge Engineering Consultants, and has been a professor and visiting professor at Tongji University, Fuzhou University, and Florida International University for more than 20 years. He has been engaged i

n bridge engineering for over 40 years and has published numerous papers and books on bridge design, dynamic and stability analysis, practical analysis methods, and capacity evaluations of different types of bridges, including box girder, curved girder, cable-stayed, truss, and arch bridges.He has b

een extensively involved in the design, analysis, and construction of different types of long span and complex bridges, including span-by-span constructed, precast and cast-in-place cantilever segmental bridges, cable-stayed bridges, and arch bridges. He is an editor/board member of Journal of Struc

tural Engineering International, IABSE and former associate editor of Journal of Bridge Engineering, ASCE.Bo Hu, Ph.D., P.E., P.Eng., is an associate technical director in the Edmonton office of COWI. He obtained his Ph.D. in civil engineering from the University of Delaware in 2006. He has been eng

aged in bridge engineering for 20 years with research and design experiences in various bridge types, seismic behaviors of bridge structures, seismic design methodology for bridge structures, and development of innovative structures. He is a professional engineer in the United States and Canada and

has been playing leading technical and project roles in a variety of large bridge projects in North America, including segmental concrete girder bridges, extradosed concrete segmental bridges, and cable-stayed concrete segmental bridges.

混凝土斜張橋利用索力調整主梁拱度之可行性研究

為了解決Cable-stayed bridge的問題，作者林立邦 這樣論述：

本研究目的主要在於探討利用索力重施拉方式進行混凝土斜張橋主梁拱度調整的可行性以及影響拱度調整的關鍵因素，以集鹿斜張橋為對象進行模擬分析，基於有限元素模型建立各種影響矩陣配合進行最佳化分析，最佳化分析之目標函數為鋼纜應力及主梁應力，限制條件包含主梁拱度符合容許誤差要求、索力調整量的限制、鋼纜應力改變量的限制以及主梁斷面應力容許改變量。研究結果顯示，不同於前期研究高屏溪斜張橋的研究成果，無法以少量鋼纜重施拉完成拱度調整作業及滿足相關構件應力檢核，針對集鹿斜張橋最大拱度調整量為3cm之情境，至少需施拉16對以上的鋼纜，若增加6束外置預力，最大拱度調整量亦僅為5cm。若對比於相同跨徑鋼構斜張橋的分析

可發現，主梁材質並非影響拱度調整的關鍵因素，影響因素主要為跨徑長度。對於主梁應力最佳化迭代分析所得到的主梁拉應力明顯較小，可知分析結果應是收斂至全局最小值，未經迭代分析則是收斂至局部最小值，原因為拱度調整分析考量變量太多所造成，而不同的目標函數之設定結果對於本研究整體拱度調整作業分析影響亦有限。