AMPLIFICATION FACTOR OF VERTICAL DISTRIBUTION OF SHEAR FORCE COEFFICIENT FOR SEISMICALLY ISOLATED BUILDINGS CORRESPONDING TO INPUT LEVEL OF DESIGN LONG-PERIOD AND LONG-DURATION GROUND MOTIONS

2020 ◽  
Vol 85 (778) ◽  
pp. 1545-1553
Author(s):  
Masahito KOBAYASHI ◽  
Masataka GODA
Keyword(s):  
Vertical Distribution ◽  
Shear Force ◽  
Amplification Factor ◽  
Ground Motions ◽  
Force Coefficient ◽  
Long Period ◽  
Long Duration ◽  
Seismically Isolated ◽  
Input Level

scholarly journals A STUDY ON EFFECT OF CUSHIONS INSTALLED IN A SEISMICALLY ISOLATED HIGH-RISE STRUCTURE UNDER LONG-PERIOD GROUND MOTIONS

2017 ◽  
Vol 23 (55) ◽  
pp. 809-814 ◽  
Author(s):  
Shigeo MINEWAKI ◽  
Hiroki HAMAGUCHI ◽  
Takahiro KINOSHITA ◽  
Akira NISHIMURA ◽  
Shuya FUTATSUGI ◽  
...  
Keyword(s):  
Ground Motions ◽  
High Rise ◽  
Long Period ◽  
Seismically Isolated

The effect of element strength assignment on the torsional response of stiffness-eccentric systems

2013 ◽  
Vol 40 (7) ◽  
pp. 655-662
Author(s):  
George K. Georgoussis
Keyword(s):  
Structural Design ◽  
Shear Force ◽  
Ground Motions ◽  
Building Structures ◽  
Centre Of Mass ◽  
Base Shear ◽  
Structural Behaviour ◽  
Torsional Response ◽  
Building Models ◽  
Storey Building

Building structures of low or medium height are usually designed with a pseudostatic approach using a base shear much lower than that predicted from an elastic spectrum. Given this shear force, the objective of this paper is to evaluate the effect of the element strength assignment (as determined by several building codes) on the torsional response of inelastic single-storey eccentric structures and to provide guidelines for minimizing this structural behaviour. It is demonstrated that the expected torque about the centre of mass (CM) may be, with equal probability, positive (counterclockwise) or negative (clockwise). This result means that the torsional strength should also be provided in equal terms in both rotational directions, and therefore the base shear and torque (BST) surface of a given system must be symmetrical (or approximately symmetrical). In stiffness-eccentric systems, appropriate BST surfaces may be obtained when a structural design is based on a pair of design eccentricities in a symmetrical order about CM, and this is shown in representative single-storey building models under characteristic ground motions.

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