scholarly journals EVALUATION OF DESTRUCTIVENESS OF EARTHQUAKE MOTIONS BY COLLAPSE BASE SHEAR COEFFICIENT SPECTRA

2000 ◽  
Vol 65 (530) ◽  
pp. 71-76 ◽  
Author(s):  
Tetsuhiro ASARI ◽  
Keiichi INOUE ◽  
Yuji ISHIYAMA
Keyword(s):  
Base Shear ◽  
Shear Coefficient

scholarly journals A note about base shear

1969 ◽  
Vol 2 (2) ◽  
pp. 171-175
Author(s):  
A. L. Andrews
Keyword(s):  
New Zealand ◽  
Seismic Analysis ◽  
Rational Method ◽  
Base Shear ◽  
Vibration Period ◽  
Shear Coefficient ◽  
Mode Vibration

Californian and Japanese seismic analysis rules have in common with New Zealand seismic rules a relation between the base shear coefficient and the prime mode vibration period. The prime mode period may be assessed by a rational method or it may be approximated.

scholarly journals BASE SHEAR COEFFICIENT OF MEDIUM AND LOW-RISE STEEL STRUCTURE BASED ON ENERGY BALANCE FOR CONTINUOUS USE AFTER EARTHQUAKE

2021 ◽  
Vol 86 (784) ◽  
pp. 893-900
Author(s):  
Takuma HASHIMOTO ◽  
Tadashi TAMURA ◽  
Yuki FURUSHIMA ◽  
Shigenobu MORI ◽  
Taisuke MURAKI ◽  
...  
Keyword(s):  
Energy Balance ◽  
Steel Structure ◽  
Base Shear ◽  
Shear Coefficient ◽  
Continuous Use

Optimization of Yield Shear Coefficient for Parallel Base Isolation System

2012 ◽  
Vol 166-169 ◽  
pp. 363-366
Author(s):  
Qiang Rong ◽  
Yan Sheng
Keyword(s):  
Objective Function ◽  
Seismic Waves ◽  
Base Isolation ◽  
Energy Scale ◽  
Scale Factor ◽  
Base Shear ◽  
Optimal Range ◽  
Isolation System ◽  
Shear Coefficient ◽  
Base Isolation System

The optimization of yield shear coefficient for parallel base isolation system is investigated systematically. The maximum dissipative energy scale factor is used as the objective function, the maximum sliding displacement of a base-isolated layer, the residual displacement and the maximum base shear coefficient are considered the constraining factors. The optimal range of the yield shear coefficient is proposed by inputting the seismic waves of the different sites.

scholarly journals Comparison of Novel Seismic Protection Devices to Attenuate the Earthquake Induced Energy

Actuators ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 73
Author(s):  
Osman Hansu ◽  
Esra Mete Güneyisi
Keyword(s):  
Lateral Displacement ◽  
Time History ◽  
Seismic Protection ◽  
Base Shear ◽  
Seismic Demands ◽  
Nonlinear Time History Analyses ◽  
History Of ◽  
Protection Devices ◽  
Nonlinear Time History ◽  
Better Than

This study addresses an alternative use of viscous dampers (VDs) associated with buckling restrained braces (BRBs) as innovative seismic protection devices. For this purpose, 4-, 8- and 12-story steel bare frames were designed with 6.5 m equal span length and 4 m story height. Thereafter, they were seismically improved by mounting the VDs and BRBs in three patterns, namely outer bays, inner bays, and all bays over the frame heights. The structures were modeled using SAP 2000 software and evaluated by the nonlinear time history analyses subjected to the six natural ground motions. The seismic responses of the structures were investigated for the lateral displacement, interstory drift, absolute acceleration, maximum base shear, and time history of roof displacement. The results clearly indicated that the VDs and BRBs reduced seismic demands significantly compared to the bare frame. Moreover, the all-bay pattern performed better than the others.

scholarly journals Effect of Bottom Geometry on the Natural Sloshing Motion of Water Inside Tanks: An Experimental Analysis

2021 ◽  
Vol 11 (2) ◽  
pp. 605
Author(s):  
Antonio Agresta ◽  
Nicola Cavalagli ◽  
Chiara Biscarini ◽  
Filippo Ubertini
Keyword(s):  
Energy Dissipation ◽  
Water Depth ◽  
Shear Force ◽  
Experimental Tests ◽  
Shear Load ◽  
Damping Properties ◽  
Base Shear ◽  
Structure Interaction ◽  
Sloshing Phenomenon ◽  
Key Aspects

The present work aims at understanding and modelling some key aspects of the sloshing phenomenon, related to the motion of water inside a container and its effects on the substructure. In particular, the attention is focused on the effects of bottom shapes (flat, sloped and circular) and water depth ratio on the natural sloshing frequencies and damping properties of the inner fluid. To this aim, a series of experimental tests has been carried out on tanks characterised by different bottom shapes installed over a sliding table equipped with a shear load cell for the measurement of the dynamic base shear force. The results are useful for optimising the geometric characteristics of the tank and the fluid mass in order to obtain enhanced energy dissipation performances by exploiting fluid–structure interaction effects.

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