Applying Adaptive Pushover Analysis to Estimate Incremental Dynamic Analysis Curve

Abstract

To estimate seismic demand and capacity of structures, it has been suggested by researchers that Incremental Dynamic Analysis (IDA) is one of the most accurate methods. Although this method shows the most accurate response of the structure, some problems, such as difficulty in modeling, time-consuming analysis and selection of the earthquake records, encourage researchers to find some ways to estimate the dynamic response of structures by using static nonlinear analysis. The simplicity of pushover analysis in evaluating structural nonlinear response serves well as an alternative to the time-history analysis method. In this paper, based on the concepts of the displacement-based adaptive pushover (DAP), a new approach is proposed to estimate the IDA curves. The performance of the proposed method has been investigated using 3- and 9-story moment-resisting frames. In addition, the results were compared with exact IDA curves and IDA curves developed by the modal pushover analysis (MPA) based method. For evaluation, IDA curves with 16%, 50% and 84% fractile were estimated. Using the results, [Formula: see text] capacities corresponding to Collapse Prevention (CP) limit state were calculated and assessed. Finite element modeling of the structures has been carried out by using ZEUS-NL software. Based on the achieved results, the proposed approach can estimate the capacity of the structure accurately. The significant advantage of the applied approach is the low computational cost and desirable accuracy. The proposed approach can be used to develop the approximate IDA curves.

Study on failure modes of a new staggered story isolated structure based on IDA method

“…Shoma Kitayama et al (Kitayama and Constantinou, 2019) employed Push over method to determine the collapse resistance of isolated structures. Through the study of different structural models, it is found that compared with the traditional push over method, the IDA method has higher accuracy in evaluating the seismic demand and capacity of the structure (Navideh et al, 2012;Ahmadi et al, 2020;Shafigh et al, 2021). On the basis of the IDA method, a vulnerability assessment of super high-rise structures is conducted, and a combined control scheme is developed to control the structural inter-story displacement (Zheng et al, 2015;He and Lu, 2019).…”

Numerical Analysis of Different Influencing Factors on the In-Plane Failure Mode of Unreinforced Masonry (URM) Structures

“…On the contrary, if the damage degree of spandrel exceeds that of pier, the failure mode is regarded as "strong pier and weak spandrel", which encourages spandrel to participate in the deformation and energy dissipation of masonry structures in advance [1,28]. Meanwhile, many theoretical analysis and experimental investigation have also been carried out [32][33][34][35][36][37].…”

A Probabilistic Framework for Robustness Quantification of Precast Concrete Frames under Seismic Loading

“…The quantification of structural robustness usually is associated with the determination of the scope of structure, the structural modelling and analysis, the selection of the robustness index, and the calculation and evaluation of structural robustness. To properly understand the influence of structural performances on structural robustness, widely used methods related to structural modelling and analysis, e.g., analytical method, pushdown and pushover methods can be adopted [5][6][7]. Furthermore, the results of other research work, e.g., those related to shear-flexural interaction [8,9] will also be very helpful to improve the modelling accuracy and thereafter the accuracy of the robustness in the process of structural robustness assessment.…”