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Stiffness identification of a tall building during construction period using ambient tests
Author(s) -
Torkamani Morteza A. M.,
Ahmadi Ahmad K.
Publication year - 1988
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290160806
Subject(s) - structural engineering , stiffening , diagonal , stiffness , normal mode , engineering , geometry , mathematics , acoustics , vibration , physics
Ambient response measurements were made on an eighteen‐storey building at three different stages of construction to detect any changes in the frequencies, mode shapes and stiffness with construction. The first nine frequencies and corresponding mode shapes for each stage of construction are found. A comparison is made among these mode shapes and frequencies and with the mode shapes and frequencies of an analytical model incorporating beams, columns, shear walls, panels and diagonal elements. The added effects, on frequencies and mode shapes, of non‐structural elements such as stairs, elevators, claddings and partition walls are studied. Using Improved Statistical Structural Identification, an attempt is made to study the stiffening effect of non‐structural elements by updating the stiffness matrix of the building.