Live Load Effect on Dynamic Response of Structuresby A. R. Chandrasekaran,
S. S. Saini,
Serial Information: Journal of the Structural Division, 1969, Vol. 95, Issue 4, Pg. 649-660
Document Type: Journal Paper
For the aseismic design of structures, the dynamic forces are generally replaced by equivalent static forces which are usually given as a function of the effective weight of the structure. The effective weight of a structure consists of full dead weight and a fraction of live loads as these are invariably spring and dashpot mounted. This paper presents the effect of such a mounting on the response of structures subjected to horizontal ground motion caused by an earthquake. The primary system as well as live load system have been idealized as single degree of freedom systems. This study indicates that only a part of the live load is effective under horizontal vibrations and this depends on the ratio of live to dead load and the amount of damping present in the live load model. The effect of various other parameters, namely, the spring mounting, undamped natural period of vibration of the primary system and the ground motion has also been investigated.
Subject Headings: Dynamic loads | Live loads | Dead loads | Structural response | Dynamic response | Ground motion | Horizontal loads | Model analysis | Vibration | Structural design
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