Studying the Impact of Near and Far Earthquakes on Concrete Buildings with Structural Light Concrete

Gudarzi, Mohammad Javad; Vajdian, Mahdi

doi:10.22034/cpj.2023.399201.1201

Studying the Impact of Near and Far Earthquakes on Concrete Buildings with Structural Light Concrete

https://doi.org/10.22034/cpj.2023.399201.1201

Volume 5, Issue 2 - Serial Number 48
May 2023

Pages 33-49

Document Type : Research Article

Authors

Mohammad Javad Gudarzi ¹

Mahdi Vajdian ²

¹ Masters Student, Faculty of Civil Engineering, Islamic Azad University, Aligudarz Branch, Aliguderz, Lorestan, Iran

² Assistant Professor, Faculty of Civil Engineering, Islamic Azad University, Aligudarz Branch, Aliguderz, Lorestan, Iran

Abstract

Concrete strength as an important parameter can play an important role in the behavior and performance of the structure. Therefore, the use of high-strength concrete can improve the performance of the structure, of course, this is an assumption that must be checked by testing and modeling. In this article, the effect of compressive strength on the behavior of concrete structures has been investigated. In this research, three frames with 5, 10, and 15 floors, which have a system, a medium-type bending frame according to the standard (2800) and the ninth topic of the national design regulations, finally, nonlinear dynamic analysis is applied to the model. The analysis and design of frames was done with the help of ETABS software. In this study, the compressive stress parameter of concrete is considered as the main variable, and two types of light concrete with a strength of 25 MPa and 55 MPa will be considered. After obtaining the sections of the desired structure, it is coded in OpenSees software. 10 records have been used to obtain fragility curves. By examining the results related to heavy and light concrete, it can be seen that in all three studied structures (five, ten and fifteen stories), the structure with heavy concrete has less drift in the same PGA as the structure with light concrete, with an averaging of the observation results. It has been found that the structure with heavy concrete has less relative displacement in the range of 15 to 24% than the structure with light concrete.

Keywords

High strength concrete

Nonlinear dynamic analysis

Medium bending frame

Concrete structure

Fragility curve

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