Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Role of Damping in Response of Hammer Foundation
Hammer foundation is a system commonly used in engineering works and consists of a foundation system on which an anvil is housed and on the anvil a ram is allowed to fall from a specified height in controlled manner for stamping works. The present design procedure for hammer foundation (IS 2974-Part 2: Foundations for impact type machines (hammer foundations), Bureau of Indian Standards, New Delhi, 1980) assumes the hammer foundation to rest on semi-infinite, elastic soil body without any embedment. For industrial requirement, the amplitude of motion of the foundation is required to be maintained at a permissible limit value for the safe working condition and to keep propagation of vibration under control to adjoining structure. In the present design procedure, damping of foundation soil media has not been taken into account and since such damping has an influence on the response of foundation vibration in vertical mode, it is understood that the damping of foundation soil will effectively decrease the mass of needed foundation to cause specified vertical vibration amplitude. Furthermore, the damping factor at the site can be easily obtained from same block vibration test suggested for determining coefficient of uniform elastic compression (CU) of the soil at the site (IS 5249-Part 2: Determination of dynamic properties of soil—method of test, Bureau of Indian Standards, New Delhi, 1992). This paper analyses the effect of damping and compare the foundation masses required for a permissible value of amplitude of 1 mm set by IS: 2974, Part-2: 1980, for different possible foundation setup required for a particular fall and weight of ram. It is observed that the inclusion of damping characteristics of the foundation soil at the site would decrease the needed mass of the foundation for the hammer for chosen condition and thus lead to more cost effective design in practice.
Role of Damping in Response of Hammer Foundation
Hammer foundation is a system commonly used in engineering works and consists of a foundation system on which an anvil is housed and on the anvil a ram is allowed to fall from a specified height in controlled manner for stamping works. The present design procedure for hammer foundation (IS 2974-Part 2: Foundations for impact type machines (hammer foundations), Bureau of Indian Standards, New Delhi, 1980) assumes the hammer foundation to rest on semi-infinite, elastic soil body without any embedment. For industrial requirement, the amplitude of motion of the foundation is required to be maintained at a permissible limit value for the safe working condition and to keep propagation of vibration under control to adjoining structure. In the present design procedure, damping of foundation soil media has not been taken into account and since such damping has an influence on the response of foundation vibration in vertical mode, it is understood that the damping of foundation soil will effectively decrease the mass of needed foundation to cause specified vertical vibration amplitude. Furthermore, the damping factor at the site can be easily obtained from same block vibration test suggested for determining coefficient of uniform elastic compression (CU) of the soil at the site (IS 5249-Part 2: Determination of dynamic properties of soil—method of test, Bureau of Indian Standards, New Delhi, 1992). This paper analyses the effect of damping and compare the foundation masses required for a permissible value of amplitude of 1 mm set by IS: 2974, Part-2: 1980, for different possible foundation setup required for a particular fall and weight of ram. It is observed that the inclusion of damping characteristics of the foundation soil at the site would decrease the needed mass of the foundation for the hammer for chosen condition and thus lead to more cost effective design in practice.
Role of Damping in Response of Hammer Foundation
Lecture Notes in Civil Engineering
Muthukkumaran, Kasinathan (Herausgeber:in) / Ayothiraman, R. (Herausgeber:in) / Kolathayar, Sreevalsa (Herausgeber:in) / Gupta, Partha (Autor:in) / Bisoi, Swagata (Autor:in) / Chattopadhyay, B. C. (Autor:in)
Indian Geotechnical Conference ; 2021 ; Trichy, India
Soil Dynamics, Earthquake and Computational Geotechnical Engineering ; Kapitel: 48 ; 565-577
01.01.2023
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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