A vector-valued ground motion intensity measure consisting of spectral acceleration and epsilon

2005 ◽  
Vol 34 (10) ◽  
pp. 1193-1217 ◽  
Author(s):  
Jack W. Baker ◽  
C. Allin Cornell
Keyword(s):  
Ground Motion ◽  
Spectral Acceleration ◽  
Intensity Measure ◽  
Vector Valued ◽  
Ground Motion Intensity Measure

scholarly journals A vector-valued ground motion intensity measure incorporating normalized spectral area

2016 ◽  
Vol 15 (1) ◽  
pp. 249-270 ◽  
Author(s):  
Aris-Artemis I. Theophilou ◽  
Marios K. Chryssanthopoulos ◽  
Andreas J. Kappos
Keyword(s):  
Ground Motion ◽  
Intensity Measure ◽  
Spectral Area ◽  
Normalized Spectral Area ◽  
Vector Valued ◽  
Ground Motion Intensity Measure

scholarly journals 70%-Damped Spectral Acceleration as a Ground Motion Intensity Measure for Predicting Highly Nonlinear Response of Structures

2019 ◽  
Vol 35 (2) ◽  
pp. 589-610 ◽  
Author(s):  
Kenny Buyco ◽  
Thomas H. Heaton
Keyword(s):  
Ground Motion ◽  
Nonlinear Response ◽  
Spectral Acceleration ◽  
Intensity Measure ◽  
Steel Moment Frame ◽  
Intensity Measures ◽  
Frame Building ◽  
Highly Nonlinear ◽  
Wide Range ◽  
Ground Motion Intensity Measure

We investigate 70%-damped spectral acceleration, Sa70%( T), as a ground motion intensity measure for predicting maximum interstory drift ratios of 0.03, 0.06, and 0.1 as well as collapse. We perform incremental dynamic analysis with 50 ground motions on 22 steel moment frame building models with heights of 3, 9, and 20 stories. We find that if T1 ≤ T ≤ 2 T1, Sa70%( T) is efficient and usually sufficient for the considered levels of highly nonlinear response. Sa70%(1.5 T1) is generally an efficient choice. We find that Sa70%( T) is similar to average spectral acceleration, Saavg, in many ways, as both intensity measures emphasize a wide range of periods in a ground motion when compared to Sa5%( T1). Sa70%( T) is equivalent to the peak of a ground motion's low-pass filtered acceleration, and this interpretation may be useful for estimating the potential of a ground motion to elicit a highly nonlinear response.

A spectral-acceleration-based combination-type earthquake intensity measure for high-rise stack-like structures

2019 ◽  
Vol 23 (7) ◽  
pp. 1350-1366 ◽  
Author(s):  
Yikun Qiu ◽  
Changdong Zhou ◽  
Siha A ◽  
Guangwei Zhang
Keyword(s):  
Ground Motion ◽  
Ground Motions ◽  
Spectral Acceleration ◽  
Intensity Measure ◽  
Earthquake Intensity ◽  
Intensity Measures ◽  
Higher Modes ◽  
High Rise ◽  
Near Fault ◽  
Period Elongation

Ground motion intensity measures are of great importance for the seismic design of structures. A well-chosen intensity measure will reduce the detailed ground motion record selection effort for the nonlinear dynamic structural analyses. In this article, a spectral-acceleration-based combination-type earthquake intensity measure is presented. This intensity measure considers the higher modes effect and period elongation effect due to nonlinear deformation at the same time. The modal mass participation factors are determined to take weighting coefficients and the product of elastic first-mode period T1 and a constant C is expressed to represent the elongated period. Therefore, the proposed intensity measure is a combination of earthquake ground motion characteristics, elastic structural responses, higher modes participation, and the period elongation effect due to inelastic structural behaviors. Four three-dimensional models of reinforced concrete stack-like structures including a 240 m-high chimney, a 180 m-high chimney, a 120 m-high chimney, and a 42.3 m-high water tower are established and analyzed in ABAQUS to investigate the correlation between the intensity measure and the maximum curvatures under 44 far-field ground motions and 28 near-fault ground motions with a pulse-like effect. With the optimal vibration modes and the proper period elongation coefficient, the efficiency of the introduced intensity measure is compared with the other 15 intensity measures. The results indicate that the proposed intensity measure is believed to be a good choice for high-rise stack-like structures, especially under the near-fault ground motions with pulse-like effect.

A new ground motion intensity measure I B

2017 ◽  
Vol 99 ◽  
pp. 97-107 ◽  
Author(s):  
Edén Bojórquez ◽  
Robespierre Chávez ◽  
Alfredo Reyes-Salazar ◽  
Sonia E. Ruiz ◽  
Juan Bojórquez
Keyword(s):  
Ground Motion ◽  
Intensity Measure ◽  
Ground Motion Intensity Measure

Study of Dispersion of the Ground Motion Intensity Measure of R/C Frame Minaret

2017 ◽  
Vol 1 (1) ◽  
pp. 24-33
Author(s):  
Mamdooh Ali Abdullah Al-baadani ◽  
Mohammed Al-Shameri
Keyword(s):  
Ground Motion ◽  
Intensity Measure ◽  
Ground Motion Intensity Measure

Simplified Method of Isolated Structure Collapse Capacity Part, (I): Ground Motion Intensity Measure

2013 ◽  
Vol 275-277 ◽  
pp. 1466-1470
Author(s):  
Yang Liu ◽  
Wen Guang Liu ◽  
Wen Fu He ◽  
Qiao Rong Yang
Keyword(s):  
Correlation Coefficient ◽  
Ground Motion ◽  
Ground Motions ◽  
Near Field ◽  
Far Field ◽  
Intensity Measure ◽  
Maximum Deformation ◽  
Average Value ◽  
Short Period ◽  
Ground Motion Intensity Measure

The equivalent velocity spectrum as a new ground motion intensity measure (IM) characterization parameter is proposed in this paper. 44 far field ground motions and 20 near-field high-speed pulse seismic waves were used for single-degree-freedom (SDOF) nonlinear time history analysis, respectively. The correlations between five IMs and maximum deformation for SDOF at various periods and different yield coefficients were analyzed. The results show that for the structures with medium-to-long period, the correlation coefficient average value of the proposed equivalent speed and maximum deformation is more than 0.6, and maximum of those is more than 0.9. The correlation coefficient average value by using the proposed equivalent speed under far field ground motions is more than those under near field ground motions. The P-delta effect on the correlation coefficients between proposed IM for the structures with medium-to-short period is significant

Sign in / Sign up

Export Citation Format

Share Document