Journal Article10.1007/S10518-021-01185-Y
A simplified normalized multi-mode nonlinear static procedure (NMP) for seismic performance evaluation of building structures
10
TL;DR: In this article, a simplified multi-mode nonlinear static procedure based on normalizing the deformation demands (called NMP) for estimating the seismic demands of structures with significant higher mode effects is presented.
read more
Abstract: The current work presents a simplified multi-mode nonlinear static procedure based on normalizing the deformation demands (called NMP) for estimating the seismic demands of structures with significant higher mode effects. The proposed procedure is conceptually based on the extended N2 (where N stands for nonlinear analysis and 2 for two mathematical models) method (Kreslin and Fajfar in Earthquake Engineering & Structural Dynamics 40:1571–89, 2011). However, the modal combination procedure used in the proposed method to take the higher mode effects into account is different. The NMP procedure generally encompasses two major steps. First, the structure is pushed using a conventional pushover procedure, namely the basic N2 method, the first-mode pushover analysis, or a pushover analysis with a triangular or a uniform load pattern, which mostly controls the responses at the lower part of the structures. Second, the modal story displacements and drifts computed based on the modal response analysis concept for all the modes of interest are algebraically added. These combined responses are normalized based on the predetermined target displacement. The final responses are the envelope of the results obtained from the two aforementioned steps. The approach used in the second step can preserve the signs of modal responses. Therefore, the effects of sign reversal due to the contribution of higher modes are included in the proposed method. Moreover, the NMP procedure mitigates the computational burden compared to nonlinear response history analysis or adaptive pushover procedures. In order to evaluate the accuracy of the proposed procedure in estimating the seismic demands of structures, it is applied to two sets of steel structures including three special moment frames (SMFs) with 6-, 12-, and 18-story heights, and a 12-story SMF with soft stories as the first set and the 9-, and 20-story SAC steel moment frames as the second set. Comparing the results of the NMP procedure with those obtained by the nonlinear response history analysis (NL-RHA) as the benchmark solution and two other pushover approaches, including a conventional first-mode-based pushover analysis and the extended N2 method, demonstrate the sufficiency of the NMP procedure in accurately estimating the global and local response quantities.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
FOSM-based updated consecutive modal pushover procedure (FUCMP) for seismic uncertainty quantification of jacket offshore platforms
TL;DR: In this article , an updated consecutive modal pushover (UCMP) procedure is implemented in the framework of the first-order-second-moment (FOSM) approach, called herein the FUCMP procedure, to quantify the effects of epistemic (modeling) uncertainties in jacket type offshore platforms (JTOPs).
4
Sensitivity of structural responses to the processing of near-fault ground motion records containing fling-step
TL;DR: In this paper , the sensitivity of the nonlinear structural responses to record processing was investigated, and the results indicated that even though the processing procedure does not preserve the static offsets of the ground motions, the seismic responses of the structures to the processed records may resemble those obtained under only the baseline-corrected ground motions (with static offsets preserved).
3
Assessing seismic performance of code-compliant steel special moment frames using ASCE 41-17
Aydin Daei,Mohamad Zarrin +1 more
TL;DR: In this paper , the authors performed a comprehensive quantitative investigation of the seismic performance of steel structures based on the component-level Tier 3 systematic evaluation procedure of ASCE 41-17, using both nonlinear static (conventional and enhanced pushover analyses) and dynamic analyses.
2
An Efficient Straightforward Pushover Method for Buildings with Two-Way Unsymmetric-Plan Subjected to Two Components of Ground Motions
TL;DR: In this paper , a straightforward pushover method is developed for unsymmetric-plan buildings under bidirectional seismic excitation, and a single innovative torsional-lateral load pattern is introduced based on the response spectrum analysis.
Displacement mitigation mechanism and parameters sensitivity analysis of steel moment frame retrofitted by self-centering braces
05 Apr 2022
TL;DR: In this paper , the authors investigated the impact of the self-centering brace (SCB) on the seismic responses of the steel moment frame (SMF) and showed that the SCB can not only successfully reduce the residual displacement of the structure, but also effectively reduce the maximum displacement.
References
Probabilistic Basis for 2000 SAC Federal Emergency Management Agency Steel Moment Frame Guidelines
TL;DR: In this paper, a formal probabilistic framework for seismic design and assessment of structures and its application to steel moment-resisting frame buildings is presented, based on realizing a performance objective expressed as the probability of exceeding a specified performance level.
A modal pushover analysis procedure for estimating seismic demands for buildings
Anil K. Chopra,Rakesh K. Goel +1 more
TL;DR: In this paper, an improved pushover analysis procedure based on structural dynamics theory, which retains the conceptual simplicity and computational attractiveness of current procedures with invariant force distribution, is presented. But, the MPA procedure is not accurate enough for practical application in building evaluation and design.
A Nonlinear Analysis Method for Performance‐Based Seismic Design
TL;DR: In this article, a relatively simple nonlinear method for the seismic analysis of structures (the N2 method) is presented, which combines the pushover analysis of a multi-degree-of-freedom (MDOF) model with the response spectrum analysis of an equivalent single degree-offreedom (SDOF) system.
1.2K
Deterioration Modeling of Steel Components in Support of Collapse Prediction of Steel Moment Frames under Earthquake Loading
TL;DR: In this article, the authors developed a database of experimental data of steel components and the use of this database for quantification of important parameters that affect the cyclic moment-rotation relationship at plastic hinge regions in beams.
913
Pros and cons of a pushover analysis of seismic performance evaluation
TL;DR: In this paper, the authors summarize basic concepts on which the pushover analysis can be based, assess the accuracy of pushover predictions, identify conditions under which pushover will provide adequate information and, perhaps more importantly, identify cases in which the prediction will be inadequate or even misleading.
788