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Chengquan Wang, Zheng Qu, Yun Zou, Chongli Yin, Yanwei Zong and Zexuan Sun
In order to develop a new type of prefabricated bridge structure system with green, efficient and recoverable function, which complies with the new requirements of rapid repair of pier function after earthquake, and improves the applicable performance of...
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Mahdi Esmaeili Varaki, Negar Tavazo and Alessio Radice
River bridge piers may collapse due to the local scour around their foundations. It is known that local scour is an effect of the three-dimensional flow field that develops near the pier and that the geometric complexity of a non-cylindrical pier may, co...
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Bouabdellah Guemou, Abdelali Seddini, Abderrahmane Nekkache Ghenim
Pág. 298 - 304
The flow pattern around a bridge pier and the scouring phenomenon are very complicated. The basic mechanism causing local scour is the down-flow at the upstream face of the pier. It is understood that the horseshoe vortex is the key mechanism that leads ...
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Wentao Xu, Li Cheng, Kailian Du, Lei Yu, Yi Ge and Jiali Zhang
In order to improve the flow state of a forebay, a contraction diversion pier is discovered, the geometric parameters of which affect the improvement of the flow state. In this paper, the standard k-e model in the computational fluid dynamics (CFD) numer...
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Xiangpeng Mu, Juan Bao and Yunfei Chen
Floating ice is easy to jam at the cross-sections contracted by bridge pier, gate pier, etc., in ice-water two-phase flow canals. To solve the problem, the critical hydraulic conditions of floating ice transport at the cross-sections between pier columns...
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Seung Oh Lee and Seung Ho Hong
Bridge pier scour is one of the main causes of bridge failure and a major factor that contributes to the total construction and maintenance costs of bridge. Recently, because of unexpected high water during extreme hydrologic events, the resilience and s...
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Abhijit Sharma Subedi, Suresh Sharma, Anwarul Islam and Niraj Lamichhane
The deterioration of bridge substructure is a serious concern across the United States. The pier encasement is one of the most common practices for repairing and strengthening the bridge substructure. It is a rehabilitation process of existing pile piers...
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Zhehan Cai, Zhijian Wang, Kaiqi Lin, Ying Sun and Weidong Zhuo
Currently, the seismic designs of reinforced concrete (RC) bridges with tall piers are often accomplished following the ductility-based seismic design method. Though the collapses of the RC bridges with tall piers can be avoided, they are likely to exper...
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Zhiqiang Wang, Chengjun Wu, Hongya Qu and Wei Xiao
In this study, finite element analysis (FEA) has been conducted for an improved grouted corrugated duct (GCD) connection design with a reserved recess in bridge footing. This study aims to understand the damage progression mechanism and to evaluate the c...
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Xiaolong Zhou, Taoxin Deng, Li Chen, Jie Chen, Ao Li, Qijie Yuan, Wei Fang and Jianfeng Gu
In the construction process of large-scale bridges, there are uncertainties and time-varying factors in the environment and construction loads. It is difficult to make accurate estimates of the theoretical calculation models of construction control in ad...
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Xiaobo Zheng, Pengli Zhang, Wenjing Zhang, Yue Yu and Yaping Zhao
The flow pattern of the forebay of the pumping station has a considerable effect on the operating efficiency and stability of the pump unit. A good forebay flow pattern can enable the pump unit to improve efficiency and operating conditions. This study t...
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Muhammad Kaleem Sarwar, Muhammad Atiq Ur Rehman Tariq, Rashid Farooq, Hafiz Kamran Jaleel Abbasi, Faraz Ul Haq, Ijaz Ahmad, Muhammad Izhar Shah, Anne. W. M. Ng and Nitin Muttil
Shock waves are generated downstream of spillways during flood operations, which have adverse effects on spillway operations. This paper presents the physical model study of shock waves at the Mohmand Dam Spillway project, Pakistan. In this study, hydrau...
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Peng Du, Abdellatif Ouahsine, Philippe Sergent, Yannick Hoarau and Haibao Hu
The average and unsteady hydrodynamics of an inland convoy passing bridge piers in a confined waterway were investigated using both numerical and experimental approaches. The numerical simulations are realized by solving the RANS (Reynolds-averaged Navie...
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Katsufumi Hashimoto, Tomoki Shiotani, Hiroyuki Mitsuya and Kai-Chun Chang
Micro energy harvesters (MEH) based on microelectromechanical systems (MEMS) are rapidly developing, providing a green and virtually infinite energy source. The electrostatic vibratory power generator outputs electric power when it vibrates, motivating u...
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T. Iori,S. Poretti
Pág. e282
Todos los trabajos de Nervi llevan el sello de sus cualidades únicas como ingeniero.Al mismo tiempo, siempre estuvieron estrechamente relacionados con las condiciones culturales y sociales, tanto a nivel nacional como mun-dial, que cambiaron considerable...
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Liangjin Xu, Xinzheng Lu, Qiaoshan Zou, Lieping Ye and Jin Di
A double-column self-centering pier fused with shear links is proposed as a novel structure, which can improve the seismic resilience of bridges. Corresponding simplified FE model and theoretical model are developed. The research outcome of this work can...
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Su-Chin Chen, Samkele Tfwala, Tsung-Yuan Wu, Hsun-Chuan Chan and Hsien-Ter Chou
A new type of collar, the hooked-collar, was studied through experiments and numerical methods. Tests were conducted using a hooked collar of a width of 1.25b and a height of 0.25b, where b is the bridge-pier width. The hooked-collar efficiency was evalu...
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Juan César Luna-Bahena, Oscar Pozos-Estrada, Víctor Manuel Ortiz-Martínez and Jesús Gracia-Sánchez
Crest piers placed on overflow spillways induce standing waves at the downstream end of them and the supercritical flow expands after flowing past the rear of the pier. The expanding flow from each side of a pier will intersect and form disturbances or s...
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Zhong Tian, Wei Wang, Ruidi Bai and Nan Li
The use of flaring gate piers (FGPs) along with finite crest-length weirs changes the shape of plunging jets and increases the efficiency of energy dissipation in some projects; however, the FGPs may affect the discharge capacity. In this study, the flow...
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Pol Bouratsis, Panayiotis Diplas, Clinton L. Dancey, Nikolaos Apsilidis
Pág. 1 - 17
The measurement of the morphologic characteristics of evolving sediment beds around hydraulic structures is crucial for the understanding of the physical processes that drive scour. Although there has been significant progress towards the experimental ch...
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