Evaluation of seismic ground motion scaling procedures for linear time-history analysis of liquid storage tanks

2015 ◽  
Vol 102 ◽  
pp. 266-277 ◽  
Author(s):  
Miguel Ormeño ◽  
Tam Larkin ◽  
Nawawi Chouw
Keyword(s):  
Ground Motion ◽  
Linear Time ◽  
Time History ◽  
Time History Analysis ◽  
Storage Tanks ◽  
Seismic Ground Motion ◽  
Liquid Storage ◽  
History Analysis ◽  
Motion Scaling ◽  
Ground Motion Scaling

Performance of cylindrical liquid storage tanks in Silakhor, Iran earthquake of March 31, 2006

2007 ◽  
Vol 40 (4) ◽  
pp. 173-182 ◽  
Author(s):  
Sassan Eshghi ◽  
Mehran S. Razzaghi
Keyword(s):  
Linear Time ◽  
Time History ◽  
Storage Tanks ◽  
Liquid Storage ◽  
History Analysis ◽  
History Of ◽  
Flexible Foundation ◽  
Theoretical Results ◽  
Strong Ground ◽  
Good Agreement

Several on-ground cylindrical liquid storage tanks experienced strong ground motion during the “Silakhor” earthquake of March 31, 2006 in western Iran, and some of the tanks suffered minor to moderate damage. In this study two of the affected tanks that were located close to the station of recording the time history of the earthquake were investigated. Responses of these tanks to the earthquake were estimated using published methods and also non-linear time history analysis, for both rigid foundation and flexible foundation assumptions. Theoretical results were compared and were generally in good agreement with the observed performance of tanks during the earthquake. For the broad tank uplift displacements observed from the earthquake matched quite closely the predictions of numerical analysis and some of the published methods, although there was a significant variation in the predictions of various methods. It was also shown that axial stresses in tank shells uplifting under earthquake are very dependent on the rigidity of the foundation.

scholarly journals EVALUASI LEVEL KINERJA GEDUNG 6 LANTAI DENGAN METODE NON-LINEAR TIME HISTORY ANALYSIS

EXTRAPOLASI ◽  
2021 ◽  
Vol 18 (1) ◽  
pp. 33-41
Author(s):  
Nurul Rochmah ◽  
Michella Beatrix ◽  
Bantot Sutriono
Keyword(s):  
Ground Motion ◽  
Linear Time ◽  
Time History ◽  
Time History Analysis ◽  
Performance Level ◽  
Building Collapse ◽  
History Analysis ◽  
Non Linear ◽  
San Fernando ◽  
Immediate Occupancy

AbstractIndonesia is a ring of fire area where earthquakes frequently occur. By realizing this, buildings in Indonesia need to calculate earthquake loads based on SNI 03-1726-2019 to minimize victims due to building collapse when earthquakes occur.It is also necessary to evaluate the performance level of a building, in this case a 6-storey building located in the Malang area. For determining the level of performance, a method called Non-Linear Time History Analysis is used. In this calculation used San Fernando, Kobe and Landers ground motion.Based on the results from the evaluation using the Non-Linear Time History method got the maximum drift story 0.137 m that occurs in Kobe ground motion. So that the maximum total drift Dt / H is 0.137 / 21.95 = 0.0063 <0.01. Based on these results, the building performance level includes IO (Immediate Occupancy).  AbstrakIndonesia termasuk daerah ring of fire dimana suatu daerah yang sering terjadi gempa. Dengan menyadari hal tersebut, bangunan-bangunan yang ada di Indonesia perlu memperhitungkan beban gempa yang ada berdasarkan SNI 03-1726-2019 untuk meminimalisir korban akibat keruntuhan bangungan yang terjadi akibat gempa. Karena itu perlu juga untuk mengevaluasi level kinerja suatu gedung dalam hal ini gedung 6 lantai yang terletak di daerah Malang. Pada gedung ini untuk dapat diketahui level kinerjanya, maka, digunakan metode yang bernama Non-Linear Time History Analisis. Ground motion yang dipakai adalah San Fernando, Kobe dan LandersBerdasarkan hasil yang diperoleh dari evaluasi dengan metode Non-Linear Time History Analisis ini adalah maximum drift story terbesar adalah 0,137 m yang terjadi pada ground motion Kobe. Sehingga Maximum total driftnya Dt/H adalah 0,137/21,95 =0,0063<0,01. Berdasar hasil tersebut lever kinerja gedung termasuk IO (Immediate Occupancy).

scholarly journals Record-to-record variability and code-compatible seismic safety-checking with limited number of records

2021 ◽  
Author(s):  
Fatemeh Jalayer ◽  
Hossein Ebrahimian ◽  
Andrea Miano
Keyword(s):  
Seismic Hazard ◽  
Linear Time ◽  
Time History ◽  
Time History Analysis ◽  
Seismic Safety ◽  
Hazard Curve ◽  
History Analysis ◽  
Non Linear ◽  
Seismic Hazard Curve ◽  
Cloud Analysis

AbstractThe Italian code requires spectrum compatibility with mean spectrum for a suite of accelerograms selected for time-history analysis. Although these requirements define minimum acceptability criteria, it is likely that code-based non-linear dynamic analysis is going to be done based on limited number of records. Performance-based safety-checking provides formal basis for addressing the record-to-record variability and the epistemic uncertainties due to limited number of records and in the estimation of the seismic hazard curve. “Cloud Analysis” is a non-linear time-history analysis procedure that employs the structural response to un-scaled ground motion records and can be directly implemented in performance-based safety-checking. This paper interprets the code-based provisions in a performance-based key and applies further restrictions to spectrum-compatible record selection aiming to implement Cloud Analysis. It is shown that, by multiplying a closed-form coefficient, code-based safety ratio could be transformed into simplified performance-based safety ratio. It is shown that, as a proof of concept, if the partial safety factors in the code are set to unity, this coefficient is going to be on average slightly larger than unity. The paper provides the basis for propagating the epistemic uncertainties due to limited sample size and in the seismic hazard curve to the performance-based safety ratio both in a rigorous and simplified manner. If epistemic uncertainties are considered, the average code-based safety checking could end up being unconservative with respect to performance-based procedures when the number of records is small. However, it is shown that performance-based safety checking is possible with no extra structural analyses.

Seismic performance of Greater Jakarta LRT with added lead rubber bearing using non-linear time history analysis

2021 ◽  
Author(s):  
Iswandi Imran ◽  
Marie Hamidah ◽  
Tri Suryadi ◽  
Hasan Al-Harris ◽  
Syamsul Hidayat
Keyword(s):  
Linear Time ◽  
Time History ◽  
Time History Analysis ◽  
Performance Level ◽  
Structural Performance ◽  
Isolation System ◽  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
History Analysis ◽  
Seismic System

<p>In order to overcome stringent seismic requirement in the new Greater Jakarta Light Rail Transit Project, a breakthrough seismic system shall be chosen to obtain expected structural performance. This seismic system shall be designed to provide operational performance level after strong earthquake events. To achieve the criteria, seismic isolation system using Lead Rubber Bearings is chosen. With this isolation system, Greater Jakarta LRT has become the first seismically isolated infrastructure and apparently an infrastructure with the largest numbers of LRBs in one single project in Indonesia. More than 10.400 Pcs LRBs are used for the first phase of the construction and the numbers will be certainly increased in the next phase of the construction. To evaluate the structural performance, non-linear time history analysis is used. A total of 3 pair matched ground motions will be used as the input for the response history analysis. The ability of the lead rubber bearing to isolate and dissipate earthquake actions will determine its structural performance level. This will be represented by the nonlinear hysteretic curves obtained throughout the earthquake actions.</p>

Seismic Vulnerability Analysis of Mid-Story Isolation and Reduction Structures Based Stochastic Vibration

2011 ◽  
Vol 243-249 ◽  
pp. 3988-3991 ◽  
Author(s):  
Pei Ju Chang ◽  
Jian Zhu
Keyword(s):  
Ground Motion ◽  
Random Sample ◽  
Seismic Vulnerability ◽  
Fragility Curves ◽  
Response Spectrum ◽  
Time History ◽  
Time History Analysis ◽  
Good Effect ◽  
History Analysis ◽  
Reduction Effect

This study focus on derivation of such fragility curves using classic mid-story isolation and reduction structures (MIRS) in China metropolis. A set of stochastic earthquake waves compatible with the response spectrum of China seismic code selected to represent the variability in ground motion. Dynamic inelastic time history analysis was used to analyze the random sample of structures. The result reveal that good effect for superstructure and reduction effect for substructure of MIRS is favorable and obvious under major earthquake, Weak position of MIRS was be pointed out and fragility curves of typical MIRS of China was obtained finally.

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