Transitions are provided in hydraulic structures for economy and efficiency. This book covers all types of flow transitions, namely, sub-critical to sub-critical; sub-critical to super critical, super-critical to sub-critical with hydraulic jump and super-critical to super-critical transitions. It initiates with introduction followed by characteristics of flow in different types of transitions and procedures for hydraulic design of transitions in different structures. Different types of appurtenances used to control flow separation and ensure uniform flow at exit of transition and diffusers are included. Examples of hydraulic design of a few typical hydraulic structures are given as well.
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Article/eBook Full Name: Urban Complexity and Spatial Strategies: Towards a Relational Planning for Our Times
Author(s): Patsy Healey
Publish Date: 2008
Published By: Routledge, London
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Concrete Segmental Bridges: Theory, Design, and Construction to AASHTO LRFD Specifications
Author(s):
Dongzhou Huang, Bo Hu
Edition:
1st Edition
Publish Date:
2020
ISBN:
9781498799003
Published By:
CRC
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The RAR archiver is the most common program after the operating system and browser, because most programs on the Internet and users are stored in compressed form in archives.
WinRAR is a powerful utility for creating and managing archives, containing a whole range of additional useful functions. WinRAR is used daily by millions of people around the world to save space on your PC and quickly transfer files.
WinRAR no longer supports Windows 98, Windows Me, Windows NT.
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Particle Damping Technology Based Structural Control
Author(s)/Editor(s): Xilin Lu Sami F. Masri Zheng Lu | Size: 20 MB | Format:PDF | Quality:Original preprint | Publisher: springer | Year: 2020 | pages: 375 | ISBN: 978-7-111-59964-7 - 978-981-15-3499-7 - 2366-2603 - 2366-259X
In recent years, natural disasters, such as earthquakes and typhoons, have occurred frequently, causing serious damage to the structure. In order to enhance the resistance of structures against natural catastrophes, especially to attenuate their structural response under earthquake and wind loads, vibration control technology is applied on structures as an effective method. Particle damping technology is a kind of vibration reduction technology which consumes the vibration energy of the system by friction and impact between tiny particles filled in a finite enclosed space of the vibration cavity. It has been widely used in mechanical engineering, aerospace engineering and other fields, and its application on civil engineering has been expanding.
The Chinese Book is funded by National Science and Technology Academic Monograph Publishing Fund (2017). The English version is the update version.
This book systematically introduces particle damping technology, which can be utilized to effectively mitigate the seismic-induced and wind-induced vibration of various structures. The research achievements pertaining to this technology are comprehensively presented in this book. The 9 chapters in the book can be divided into 3 main aspects, first of all, in Chaps. 1 and 2, the book gives a detailed introduction and comprehensive description of structural vibration control technology and particle damping technology utilized in civil engineering, and provides a newly efficacious approach for the mitigation of earthquake-induced and wind-induced vibrations generated in high-rise buildings. The second part is illustrated in Chaps. 3–7, systematically theoretical analysis and practical simulation method for particle impact dampers are proposed, as well as demonstrated the extensive shaking table test and wind tunnel test on particle impact dampers applied to civil structures, which are conducive to understanding the damping mechanisms and optimal working conditions of particle impact dampers. In Chaps. 8 and 9, profound discussions are carried out on the future perspectives of particle damping technology, especially emphasized on studying and developing semi-active particle damping technology, and established the guidelines for optimization design of particle impact dampers. Some distinct features of this book can be summarized as follows:
• The elaborated simulation model based on discrete element method and the simplified simulation model based on equivalent principles are demonstrated, the models are verified by corresponding experimental results.
• The steady-state responses of particle impact dampers under various scenarios are illustrated.
• The vibration attenuation effects of particle dampers subjected to different dynamic loads have been intensively studied, by which the damping mechanism and the “global” measures that are used to evaluate the damping performance are proposed.
• The shaking table test and wind tunnel test have been conducted to verify the proposed simulation methods, and the satisfactory damping performance of
particle dampers has been corroborated.
• The optimization design guidelines of particle impact dampers are provided.
• The semi-active particle damping technology in which the primary system is subjected to non-stationary excitations is preliminary explored.
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