Effect of Vertical Elastic Design Spectral Obtained According to Different Soil Classes on Beam Behavior and Comparison of Vertical Component of K.Maras Earthquake with Beam Effect

Year 2023, , 110 - 122, 04.03.2024

Furkan Şahin , Ersen Araslı

https://doi.org/10.19072/ijet.1324111

Abstract

In practice and theory, many types of reinforced concrete slabs are used, such as beamed, beamless, and ribbed slabs. Beamed floors are connected to the columns by means of beams, and their vertical and horizontal loads are transferred to the columns through these beams. Therefore, beams are accepted as an important structural element by earthquake experts and many formulas and approaches have been developed in terms of horizontal and vertical load effects that occur in order to transfer the load transfer to the elements as desired. In this study, beam shear forces that occur under the influence of vertical earthquakes at the i and j ends of the beams of a fictional building whose floors are modeled according to the rigid diaphragm assumption in the ETABS were investigated. In this study, the shear forces that occur in the beams of a fictionally designed building under the effect of vertical earthquakes, and the floors carried by the beams are examined by designing with the assumption of a rigid diaphragm. The structure is designed with 3 openings in the X and Y directions and each opening is equal and 5 m. The 5-storey building has been designed to have equal floor heights of 3 m. The structure was obtained by using parameters belonging to 5 different soil classes as ZA, ZB, ZC, ZD, ZE, and 5 different vertical elastic design spectrums represented by the abbreviations EZ_ZA, EZ_ZB, EZ_ZC, EZ_ZD were activated in the ETABS. Seismic station coordinates numbered 4631 in K.Maras/Elbistan were used to obtain the parameters to be used in obtaining the vertical elastic design spectral of the structure. These coordinates were selected in order to compare the i and j end shear forces of the beam with the previously obtained beam i and j ends shear forces by influencing the Mw:7.6 Elbistan earthquake recorded by the seismic station to the building. Since the structure is symmetrical in both X and Y directions, the results obtained from beams B2, B3, B5, B19 represent the beam shear forces occurring at the i and j ends of all beams of the structure. As a result, it has been seen that the highest values of beam i and j end shear forces, obtained by affecting both the vertical elastic design spectral and the data of the vertical component of the Elbistan Mw:7.6 earthquake, were obtained on the 5th floor, which is the top floor of the building. The structure showed similar behavior among the different vertical elastic design spectral, and the highest value was obtained for each vertical elastic design spectrum at the 5th floor. Among these vertical elastic design spectral, the EZ_ZC spectrum gave the highest value at the 5th floor of the building. When the EZ_ZC vertical elastic design spectrum beam i and j end shear forces are compared with the beam i and j end shear forces of the vertical component data of the Elbistan Mw:7.6 earthquake, it is seen that the difference is not significant. It has been seen that the beam i and j end shear force value of the spectrum is higher than the shear force value.

Keywords

Shear force, TBER, Earthquake, Elbistan, vertical earthquake component

Farklı Zemin Sınıfına Göre Elde Edilmiş Düşey Elastik Tasarım Spektrumlarının Yapı Davranışına Etkisi ve K.Maraş Deprem Verileri ile Karşılaştırılması

Abstract

Bu çalışmada beş farklı zemin sınıfı ZA, ZB, ZC, ZD, ZE için sırasıyla EZ_ZA, EZ_ZB,EZ_ZC,EZ_ZD olarak temsil edilen dikey elastik tasarım spektrumları elde ettik. Binanın koordinatları Türkiye'nin Elbistan ilçesinde bulunan 4631 numaralı deprem sismik istasyonu dikkate alınarak seçilmiştir. Elde ettiğimiz spektrumları 3 açıklıklı 5 katlı yapıya atadık ve kirişlerin I ve J uçlarındaki kesme kuvvetlerini gözlemledik. Yapı simetrik olduğundan B2, B3, B5, B19 kirişlerinin i ve j uçlarının sonuçlarının bu çalışma kapsamında yapının özelliklerini tam olarak yansıttığı varsayılmıştır. Bu bağlamda, bu kirişler için en yüksek kesme kuvvetleri düşey elastik tasarım spektrumlarının etkisi altında 5. katta elde edilmiştir. Öte yandan, AFAD'ın 4631 numaralı sismik istasyonundan sağlanan K.Maraş deprem düşey bileşen verilerini binaya atadık ve ayrıca Elbistan deprem verilerini EZ_ZC sperktrum verileriyle karşılaştırdığımızda en yüksek kiriş kesme kuvvetlerini 5. katta elde ettik. Ancak gerçek deprem ve EZ_ZC spektrum verileri arasında i ve j ucundaki kesme kuvveti farkının düzeyinin önemli olmadığını gözlemledik. Ancak elde ettiğimiz kesme kuvveti değeri, analiz için kullandığımız diğerlerinden daha yüksekti.

Keywords

kiriş kesme kuvveti, düşey deprem bileşeni, Türkiye bina deprem yönetmeliği, Elbistan depremi

References

• [1] AFAD, «https://tdth.afad.gov.tr/,» AFAD. [Çevrimiçi].
• [2] TBER, Istanbul, 2018.
• [3] S. J. Kim, C. J. Holub ve A. S. Elnashai, «Analytical Assessment of the Effect of Vertical Earthquake Motion on RC Bridge Piers,» Journal of Structural Engineering, pp. 252-260, Şubat 2011.
• [4] Z. Jin, S. Pei, X. Li, H. Liu ve S. Qiang, «Effect of Vertical Ground Motion on Earthquake-Induced Derailment of railway vehicle over simply-supported bridges,» Journal of Sound and Vibration, pp. 277-294, Ağustos 2016.
• [5] R. Lİ ve C. Yao, «Effects of Vertical Earthquake Ground Motions on Seisminc Response of Steel-Concrete Plate Cosmosite Beam Bridgese,» %1 içinde 2020 International Conference on Intelligent Transportation, Big Data & Smart City (ICITBS), 2020.
• [6] S. Chen, H. Xia, W. An ve Y. Wen, «Theoretical Investigation on Multiple Separation of Bridge under Near-Fault Vertical Ground Motion,» Hindavi, Mathematical Problems in Engineering, pp. 1-15, 25 Ağustos 2021.
• [7] A. Talsimi ve M. Tehranizadeh, «The Effect of Vertical Near-Field Ground Motion on the Collapse Risk of High-Rise Reinforced Concrete Frame-Core Wall Structures,» Advances in Structrual Engineering, pp. 410-425, 2022.
• [8] M. Alizadeh, «The Effect of Vertical Earthquake Componenet on Structural Behaviour in Multi-Story Structures,» Istanbul, 2019.
• [9] E. Keskin, Effect of Vertical Ground Motion on the Performance of High-Rise Building, Ankara: Middle East Tecnical University, Naturaş and Applied Sciences Insitute, Published Master Degree Thesis, 2020.
• [10] S. Tamaddon, M. Hosseini ve A. Vasseghi, «Effect of Non-Uniform Vertical Exitation on Vertical Pounding Phenomenon in Continuous-Deck Curved Box Girder RC Bridges Subjected to Near-Source Earthquake,» Journal of Earthquake Engineering, pp. 5361-5383, February 2021.
• [11] TS498, Ankara: Institute of Turkish Standarts, 1997.
• [12] TS500, Ankara: Institute of Turkish Standarts, 2000.
• [13] E. Keskin, Effect of Vertical Ground Motion on the Performance of High-Rise Building, Ankara: Orta Doğu Teknik Üniversitesi. Yayınlanmış Yüksek Lisans Tezi, 2020.
• [14] S. Tamaddon, M. Hosseini ve A. Vasseghi, «Effect of Non-Uniform Vertical Exitation on Vertical Pounding Phenomenon in Continuous-Deck Curved Box Girder RC Bridges Subjected to Near-Source Earthquake,» Journal of Earthquake Engineering, pp. 5361-5383, 01 02 2021.