Investigation of the Earthquake Performance Adequacy of Low-Rise RC Structures Designed According to the Simplified Design Rules in TBEC-2019

Abstract

In this study, earthquake performance of the structures was tested which were modeled according to the minimum criteria of simplified analysis approach proposed in TBEC-2019. For this purpose, 144 reinforced-concrete building models were designed according to parameters such as earthquake design class, building height (number of storey), number of spans, soil type and three different simplified formulas suggested in the code. The level of structural performance of buildings models was determined by the linear (L) and nonlinear performance analysis (NL) methods that given in TBEC-2019. The base shear force, top displacements and over-strength factor (Ω) of each structural model were obtained, and performance analysis was performed by comparatively. As a result of the structural analyses, it was seen that some of the buildings model designed according to minimum column sectional criteria given in simplified methods could not meet the suggested seismic performance level. While the number of structural models that provide the controlled damage (CD) level in the L analysis method is 44 (30.55%), it is 107 (74.3%) in the NL analysis method. The insufficient performance was obtained in both L and NL methods in models which have over-strength values below 3. It has been observed that multi-criteria of building performance are not met with the weakening of local soil conditions. It was also seen that the L method chosen in the performance analysis gave more conservative results with this study.

A Hybrid Artificial Neural Network—Particle Swarm Optimization Algorithm Model for the Determination of Target Displacements in Mid-Rise Regular Reinforced-Concrete Buildings

“…In Equation (3), f(P i ) represents the fitness value of the i-th particle, ANN i represents the ANN network structure established with the i-th particle, and MSE represents the mean squared error. After obtaining the pbest and gbest values of each particle, the velocities of the particles were updated, as shown in Equation (1), and the positions of the particles according to the calculated velocity values were updated, as shown in Equation (2).…”

“…The W value in the equation shows the momentum coefficient, and the C 1 and C 2 constants are the learning parameters used to find the best solution. The value of X n (t) given in Equation (2) shows the position of the n particle in the t iteration.…”

“…Major structural damages and loss of life due to these damages during earthquakes revealed the necessity and importance of performance-based design and evaluation of structures [1][2][3]. The first important product of these studies is the "Vision 2000 Report" published in 1995 by the California Society of Structural Engineers (SEAOC, 1995) [4].…”

Assessing the 3D structural behavior of RC library buildings with/without non-structural elements considering shake table tests and 3D numerical analyses

“…The 2018 TBEC is based on the "Italian Building Instruction for Construction in Earthquake Region" developed in 1940. Later, "Italian Building Instruction for Construction in Earthquake Region" was revised in 1944, 1949, 1953, 1962, 1968, 1975, 1998, 2007, and 2018, and finally, the 2018 TBEC Disaster and Emergency Management Presidency (2018) is used for modeling and analysis of structures in Turkey (Bilgin et al, 2022;Işık, 2022;Yel et al, 2022). Moreover, ASCE standards are updated or reaffirmed by the same process every 5-10 years.…”

Comparison of Performance Analysis Results with Developed Site-Specific Response Spectra and Turkish Seismic Design Code: A Case Study from the SW Türkiye Region

“…Compared to its predecessors, the latest map was made with more precise information by utilizing the most recent earthquake catalogs, mathematical models, and source parameters. The utilization of the TBEC-2018 [9] code involves the incorporation of this map for the purpose of developing a design spectrum that accounts for various levels of seismic ground motion and site classifications [10][11][12][13].…”