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Dynamic Inelastic Analysis of Tall Buildings

by Won-Kee Hong, Samsung Engr. & Const. Co Ltd, Seoul, Republic of Korea,
Heecheul Kim, Samsung Engr. & Const. Co Ltd, Seoul, Republic of Korea,
George W. Yang, Samsung Engr. & Const. Co Ltd, Seoul, Republic of Korea,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

Members with undesirably early formed plastic hinges as well as excessive conservatism introduced in the preliminary design of tall buildings can be identified by the behavior state study in terms of inelastic force-displacement relationships. It has been common practice to design tall buildings in a way that the reserved strength available after the formation of plastic hinges is called on to resist strong ground motions, avoiding the collapse of structures. In this paper a practical way has been suggested to obtain dynamic inelastic behavior of tall buildings by successively altering structures to account for the plastic hinges formed in members. The dynamic characteristics are also considered by updating the distribution of lateral load based on the mode superposition technique as the natural period of the building is being shifted due to the inelastic deformation.

Subject Headings: Plastic hinges | Structural dynamics | High-rise buildings | Elasticity and Inelasticity | Dynamic loads | Ground motion | Dynamic structural analysis

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