A multi-stage-based nonlinear static procedure for estimating seismic demands of steel MRFs equipped with steel slit walls

2019 ◽  
Vol 183 ◽  
pp. 1091-1108
Author(s):  
Ke Ke ◽  
Fuming Wang ◽  
Michael C.H. Yam ◽  
Lu Deng ◽  
Yongjun He
Keyword(s):  
Seismic Demands ◽  
Multi Stage ◽  
Nonlinear Static Procedure ◽  
Nonlinear Static ◽  
Steel Mrfs

scholarly journals Application of Nonlinear Static Procedures for the Seismic Assessment of Regular RC Moment Frame Buildings

2014 ◽  
Vol 30 (2) ◽  
pp. 767-794 ◽  
Author(s):  
Michalis Fragiadakis ◽  
Dimitrios Vamvatsikos ◽  
Mark Aschheim
Keyword(s):  
Pushover Analysis ◽  
Nonlinear Dynamic Analysis ◽  
Single Mode ◽  
Moment Frame ◽  
Seismic Demands ◽  
Frame Buildings ◽  
Moment Resisting ◽  
Nonlinear Static ◽  
Global And Local ◽  
Modal Pushover

The applicability of nonlinear static procedures for estimating the seismic demands of typical regular RC moment-resisting frames is evaluated. This work, conducted within the framework of the ATC-76-6 project, shows the degree to which nonlinear static methods can characterize global and local response demands vis-à–vis those determined by nonlinear dynamic analysis for three RC moment-frame buildings. The response quantities (engineering demand parameters) considered are peak story displacements, story drifts, story shears, and floor overturning moments. The single-mode pushover methods evaluated include the N2 and the ASCE-41 coefficient methods. Multi-modal pushover methods, such as modal pushover analysis and the consecutive modal pushover method, were also evaluated. The results indicate that the relatively good performance of the single-mode methods observed for low-rise buildings rapidly deteriorates as the number of stories increases. The multi-modal techniques generally extend the range of applicability of pushover methods, but at the cost of additional computation and without ensuring the reliability of the results.

scholarly journals Accuracy of Advanced Methods for Nonlinear Static Analysis of Steel Moment-Resisting Frames

2014 ◽  
Vol 8 (1) ◽  
pp. 310-323 ◽  
Author(s):  
Massimiliano Ferraioli ◽  
Alberto M. Avossa ◽  
Angelo Lavino ◽  
Alberto Mandara
Keyword(s):  
Pushover Analysis ◽  
Nonlinear Static Analysis ◽  
Seismic Demands ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Capacity Spectrum ◽  
History Analysis ◽  
Moment Resisting ◽  
Response History Analysis ◽  
Nonlinear Static

The reliability of advanced nonlinear static procedures to estimate deformation demands of steel momentresisting frames under seismic loads is investigated. The advantages of refined adaptive and multimodal pushover procedures over conventional methods based on invariant lateral load patterns are evaluated. In particular, their computational attractiveness and capability of providing satisfactory predictions of seismic demands in comparison with those obtained by conventional force-based methods are examined. The results obtained by the static advanced methods, used in the form of different variants of the original Capacity Spectrum Method and Modal Pushover Analysis, are compared with the results of nonlinear response history analysis. Both effectiveness and accuracy of these approximated methods are verified through an extensive comparative study involving both regular and irregular steel moment resisting frames subjected to different acceleration records.

scholarly journals Evaluation of Modal and FEMA Pushover Procedures Using Strong-Motion Records of Buildings

2005 ◽  
Vol 21 (3) ◽  
pp. 653-684 ◽  
Author(s):  
Rakesh K. Goel
Keyword(s):  
Pushover Analysis ◽  
Strong Motion ◽  
Northridge Earthquake ◽  
Reasonable Estimate ◽  
Modal Pushover Analysis ◽  
Higher Mode Effects ◽  
Mode Effects ◽  
Nonlinear Static Procedure ◽  
Nonlinear Static ◽  
Fema 356

The objective of this investigation is to evaluate the FEMA-356 Nonlinear Static Procedure (NSP) and a recently developed Modal Pushover Analysis (MPA) procedure using recorded motions of four buildings that were damaged during the 1994 Northridge earthquake. For this purpose, displacements and drifts from the FEMA-356 NSP and the MPA procedures are compared with the values “derived” from the recorded motions. It is found that the FEMA-356 NSP typically underestimates the drifts in upper stories and overestimates them in lower stories when compared to the recorded motions. Among the four FEMA-356 distributions considered, the “Uniform” distribution led to the most excessive underestimation or overestimation indicating that the need to carefully reevaluate the usefulness of this distribution in the FEMA-356 NSP. Furthermore, FEMA-356 distributions failed to provide accurate estimates of story drifts for a building that satisfied the FEMA-356 criterion for detecting the presence of higher mode effects indicating the need to carefully re-examine this criterion. The MPA procedure, in general, provides estimates of the response that are much closer to the values from the recorded motion compared to those from the FEMA-356 NSP. In particular, the MPA procedure, unlike the FEMA-356 NSP, is able to capture the effects of higher modes. For a building that exhibits dominant effects of “soft” first story, however, neither the MPA procedure nor the FEMA-356 NSP led to reasonable estimate of the response.

New equivalent damping for the ATC nonlinear static procedure

2021 ◽  
Vol 374 ◽  
pp. 111044
Author(s):  
Thuong Anh Nguyen ◽  
Pierre Labbé ◽  
Guillaume Hervé-Secourgeon
Keyword(s):  
Equivalent Damping ◽  
Nonlinear Static Procedure ◽  
Nonlinear Static
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