Critical Earthquake Loads for SDOF Inelastic Structures Considering Evolution of Seismic Waves

2012 ◽  
pp. 203-220
Author(s):  
Izuru Takewaki ◽  
Abbas Moustafa ◽  
Kohei Fujita
Keyword(s):  
Seismic Waves ◽  
Earthquake Loads ◽  
Inelastic Structures

Critical earthquake loads for SDOF inelastic structures considering evolution of seismic waves

2010 ◽  
Vol 1 (2) ◽  
pp. 147-162 ◽  
Author(s):  
Abbas Moustafa ◽  
Kohei Ueno ◽  
Izuru Takewaki
Keyword(s):  
Seismic Waves ◽  
Earthquake Loads ◽  
Inelastic Structures

scholarly journals A Bufferable Tuned-Mass Damper of an Offshore Platform against Stroke and Response Delay Problems under Earthquake Loads

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Qiong Wu ◽  
Xilu Zhao ◽  
Shuai He ◽  
Wenxian Tang ◽  
Rencheng Zheng
Keyword(s):  
Seismic Waves ◽  
Large Earthquake ◽  
Tuned Mass Damper ◽  
Offshore Platform ◽  
Offshore Platforms ◽  
Response Delay ◽  
Earthquake Loads ◽  
Response Characteristics ◽  
Mass Damper ◽  
Dynamic Performances

A tuned-mass damper (TMD) is applied to ensure the safety and stability of an offshore platform in practice; however, damper stroke and response delay problems always result in intractable performances of vibration control while exposed to large earthquake loads. Therefore, this paper proposes a bufferable TMD, a passive TMD with buffers on both sides, to improve the performance of offshore platforms subjected to large seismic waves. A comprehensive simulation and experimental study was executed to investigate the dynamic performances of the bufferable TMD, by application of a 1 : 200-scale offshore platform prototype. It is verified that the bufferable TMD can be effective in absorbing the stroke energy, while the damper exceeds limitations of motion. Meanwhile, the bufferable TMD can maintain high-response characteristics. In conclusion, the experimental results indicate that the displacement, acceleration, and frequency performances of an offshore platform can be significantly decreased, and the evaluation indices show that the method is effective in reducing overall vibration levels and maximum peak values, with the application of the bufferable damper system.

scholarly journals Base Shear Struktur Beton Bertulang Yang Menggunakan Base Isolator Akibat Beban Gempa Dengan Menggunakan Etabs

2021 ◽  
Vol 1 (1) ◽  
pp. 13-23
Author(s):  
Dicky N. Nggaba ◽  
Partogi H Simatupang ◽  
A. Hidayat Rizal
Keyword(s):  
Seismic Waves ◽  
Time History ◽  
Analysis Method ◽  
Reinforced Concrete Structure ◽  
Base Shear ◽  
Earthquake Loads ◽  
History Analysis ◽  
Base Isolator ◽  
Internal Forces ◽  
Sudden Release

The sudden release of energy within earth creates seismic waves on earth’s surface that is earthquake. This research was carried out using a base isolator type of HDR with  Certification Number MVBR-0516 (XO.3R) to reduce base shear, displacement and internal forces acting on the structure. This study uses time history analysis method with some earthquake loads in the form of acceleration acceleration. The objectives of the study were to determine the base shear of a reinforced concrete structure building using a base isolator and without using a base insulator. The results of this study indicate the use of base insulators reduces base shear by about 20% -67% and 14% -70.5% for earthquakes in the x direction to the east and west. Meanwhile, in the y direction earthquake, it was around 43% -70% and 43% -62% to the south and north

scholarly journals CRITICAL INPUT FOR INELASTIC STRUCTURES UNDER EVOLVING SEISMIC WAVES

2011 ◽  
Vol 76 (659) ◽  
pp. 79-87 ◽  
Author(s):  
Kohei UENO ◽  
Kohei FUJITA ◽  
Abbas MOUSTAFA ◽  
Izuru TAKEWAKI
Keyword(s):  
Seismic Waves ◽  
Inelastic Structures

Seismic stability of the underground main pipeline

2011 ◽  
Vol 8 (1) ◽  
pp. 275-286
Author(s):  
R.G. Yakupov ◽  
D.M. Zaripov
Keyword(s):  
Laplace Transformation ◽  
Seismic Waves ◽  
Generalized Functions ◽  
Seismic Stability ◽  
Main Pipeline ◽  
Motion Equations ◽  
Numerical Example ◽  
Earthquake Force ◽  
Deformed State

The stress-deformed state of the underground main pipeline under the action of seismic waves of an earthquake is considered. The generalized functions of seismic impulses are constructed. The pipeline motion equations are solved with used Laplace transformation by the time. Tensions and deformations of the pipeline have been determined. A numerical example is reviewed. Diagrams of change of the tension depending on earthquake force are provided in earthquake-points.

A mixed tetrahedral element with nodal rotations for large-displacement analysis of inelastic structures

2016 ◽  
Vol 108 (7) ◽  
pp. 722-749 ◽  
Author(s):  
Nicola A. Nodargi ◽  
Federica Caselli ◽  
Edoardo Artioli ◽  
Paolo Bisegna
Keyword(s):  
Large Displacement ◽  
Displacement Analysis ◽  
Tetrahedral Element ◽  
Inelastic Structures
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