اعتبار،چابکی،پاسخگویی

آثار درصد نامنظمی جرمی در ارتفاع در ساختمان کوتاه مرتبه قاب خمشی با لحاظ اندرکنش خاک-سازه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد مهندسی عمران گرایش سازه، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشیار، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده
این مقاله به بررسی عملکرد لرزه‌ای ساختمان‌ قاب خمشی متوسط فولادی کوتاه مرتبه دارای درصدهای مختلف نامنظمی جرمی که مطابق با آیین‌نامه‌های ایران و معتبر خارجی طراحی‌شده، می‌پردازد. بدین منظور، سازه‌ای 3 طبقه که بر روی خاک نوع 2 استاندارد 2800 (نوع C آیین‌نامه ASCE7) و برای منطقه تهران که دارای منطقه با پهنه‌بندی خطر زلزله خیلی‌زیاد واقع‌شده، مورد مطالعه قرارگرفته است. سازه‌ مورد بررسی، تحت 22 رکورد دور از گسل با لحاظ اندرکنش خاک-سازه و نامنظمی‌های مختلف جرمی در ارتفاع تحت سطح خطر زلزله 1 (زلزله طرح) مورد مورد تحلیل تاریخچه-زمانی قرارگرفته است. این سازه در نرم‌افزار اجزای محدود OpenSees شبیه‌سازی که در آن رفتار غیرخطی هندسه و مصالح در نظر گرفته‌شده است. نتایج نشان داد که به‌طورکلی پاسخ‌های جابجایی نسبی و شتاب مطلق سازه‌های با پایه انعطاف‌پذیر در مقایسه با سازه‌های با پایه صلب الگوی یکسانی ندارند. شدت مختلف نامنظمی‌ها در بیشینه‌ترین حالت، مقادیر جابجایی نسبی را در حالت پایه صلب وقتی افزایش جرم در طبقه میانی اعمال‌شده، به صورت میانگین 30 درصد افزایش‌داده است. همچنین شدت مختلف نامنظمی‌ها در بیشینه‌ترین مقدار، در حالت پایه انعطاف‌پذیر وقتی افزایش جرم در طبقه میانی بوده، به صورت میانگین 40 درصد افزایش مقادیر شتاب را به‌همراه دارد. با لحاظ اثر اندرکنش خاک-سازه در بیشینه‌ترین حالت، مقدار شتاب با در نظر گرفتن افزایش جرم در طبقه میانی، به‌صورت میانگین 22 درصد افزایش‌یافته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله English

The effects of mass irregularity percentage in height in a Low rise building of flexural frame with regard to soil-structure interaction

نویسندگان English

Maryam Kiani 1
Houshyar Eimani Kalehsar 2
1 Masters degree in civil engineering-structure, Department of Civil Engineering, Technical and Engineering Faculty, University of Mohaghegh Ardabili, Ardabil, Iran
2 Associate Professor, Department of Civil Engineering, Technical and Engineering Faculty, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده English

This article investigated the seismic performance of low-rise steel intermediate moment resistance frame with different percentages of mass irregularity. The irregularity of structures considered according to Iranian standard code No.. 2800 and ASCE7. For this purpose, a 3-story structure that is located on soil type 2 of Iranian standard 2800 (soil type C of ASCE7) with the high-risk level hazard seismic category (region of Tehran), has been studied. The investigated structure had been subjected to nonlinear o time-history analysis under 22 records far-field ground motions considering soil-structure interaction and various mass irregularities at design basis earthquake level of Iranian standard No. 2800. This structure was simulated via OpenSees finite element software that the nonlinear behavior of geometry and materials is considered. The results showed that the drift and absolute acceleration responses of structures with flexible foundations did not have the same pattern compared to structures with rigid foundations. The considered irregularity of structures can be increased the drift value about 30 percent compared to rigid base structure. Also, the maximum absolute acceleration responses can increase about 40 percent with exciting irregularity compared to rigid base structure. In addition, the mean of absolute acceleration responses can increase about 22 percent with exciting irregularity compared to rigid base structure.

کلیدواژه‌ها English

  • Seismic performance
  • Mass irregularity
  • Soil-structure interaction
  • Nonlinear dynamic analysis
  • Steel moment-resistance frame
Akbari, P., Saberi, V.,Saberi, H.,Eslami, F., Sadeghi,A. (2020). Study the Seismic Behavior of Steel
Structures with Concentric Braces with Soil-Structure Interaction. Civil and project journal, 2(9), 11-
21. Persian.
Al-Ali, A. A. K. (1999). Effects of vertical irregularities on seismic behavior of building structures.
Stanford University.
ASCE7-10 Minimum Design Loads and Associated Criteria for Buildings and Other Structures,
(2010). Asce7-10.
Broujerdian,V., Mohammadi Dehcheshmeh, E., & Safari, P. (2023). Seismic performance
assessment of intermediate moment-resisting steel frames designed based on misidentified site soil
classes. Sci. Iran.
Chen, L. (2016). Dynamic interaction between rigid surface foundations on multi-layered half space.
Int. J. Struct. Stab. Dyn., 16(05), 1550004.
Eimani kalehsar, H., & Kiani, M. (2023). Investigating the effect of soil-structure interaction on the
seismic performance of buildings having medium flexural frame with mass irregularity. J. Struct.
Constr. Eng., doi: 10.22065/jsce.2023.404764.3162. Persian
El Ganainy, H., & El Naggar, M. H. (2009). Seismic performance of three-dimensional frame
structures with underground stories. Soil Dyn. Earthq. Eng., 29(9), 1249–1261.
FEMA, (2009). FEMA P695: Quantification of building seismic performance factors. US
Department of Homeland Security, FEMA.
Gajan,S., Hutchinson, T. C., Kutter, B. L., Raychowdhury, P., Ugalde, J. A., & Stewart, J. P. (2008).
Numerical models for analysis and performance-based design of shallow foundations subjected to
seismic loading. Pacific Earthquake Engineering Research Center.
Gazetas, G. (1998). Seismic soil-structure interaction: New evidence and emerging issues State of
the Art Paper. In Geotechnical Earthquake Engineering and Soil Dynamics Geo-Institute ASCE
Conference.
Gazetas, G., & Apostolou, M. (2004). Nonlinear soil–structure interaction: foundation uplifting and
soil yielding. In Proceedings Third UJNR Workshop on Soil-Structure Interaction, 29–30.
IBC Standard, (2013). Iranian Building Codes And Standards, Iranian Code Of Practice For Seismic
Resistant Design Of Buildings, Standard No.2800, 4th Edition.
INBC Part 6th, (2013). Iranian National Building Code, Part 6th , Design Loads for Buildings.
Kazemi, F., & Jankowski, R. (2023). Enhancing seismic performance of rigid and semi-rigid
connections equipped with SMA bolts incorporating nonlinear soil-structure interaction. Eng. Struct.,
274, 114896.
Kazemi, F., & Jankowski, R. (2023). Machine learning-based prediction of seismic limit-state
capacity of steel moment-resisting frames considering soil-structure interaction. Comput. Struct., 274,
106886.
Kazemi, F., Asgarkhani, N., & Jankowski, R. (2023). Probabilistic assessment of SMRFs with infill
masonry walls incorporating nonlinear soil-structure interaction. Bull. Earthq. Eng., 21(1), 503–534.
Le‐ Trung, K., Lee, K., Lee, J., & Lee, D. H. (2012). Evaluation of seismic behaviour of steel special
moment frame buildings with vertical irregularities. Struct. Des. Tall Spec. Build., 21, (3), 215–232.
M. Dehcheshmeh, E., Rashed, P., Broujerdian, V., Shakouri, A., & Aslani, F. (2023). Predicting
Seismic Collapse Safety of Post-Fire Steel Moment Frames. Buildings, 13(4), 1091.
Mazzoni, S., McKenna, F., Scott, M. H., & Fenves, G. L. (2006). OpenSees command language
manual. Pacific earthquake engineering research (PEER) center, 264(1), 137-158.
Michalis, F., Dimitrios,V., & Manolis, P. (2006). Evaluation of the influence of vertical irregularities
on the seismic performance of a nine‐ storey steel frame. Earthq. Eng. Struct. Dyn., 35(12), 1489–1509.
Naeim, F. (1989). The seismic design handbook. Springer Science & Business Media.
Pirizadeh, M., & Shakib, H. (2013). Probabilistic seismic performance evaluation of non-geometric
vertically irregular steel buildings. J. Constr. Steel Res., 82, 88–98.
Civil and Project Journal, 2024, 6(5),36-53
https://doi.org/10.22034/cpj.2024.456462.1289
53
Pouraminian, M., Pourbakhshian, S., Yousefzadeh, H., & Farsangi, E. N. (2021). Reliability-based
linear analysis of low-rise RC frames under earthquake excitation. Journal of Building Pathology and
Rehabilitation, 6(1), 32.
Rahgozar, N., Pouraminian, M., & Rahgozar, N. (2021). Reliability-based seismic assessment of
controlled rocking steel cores. Journal of Building Engineering, 44, 102623.
Raychowdhury, P. (2008). Nonlinear winkler-based shallow foundation model for performance
assessment of seismically loaded structures. UC San Diego.
Sabouniaghdam, M., Mohammadi Dehcheshmeh, E., Safari, P., & Broujerdian, V. (2022).
Probabilistic collapse assessment of steel frame structures considering the effects of soil-structure
interaction and height. Sci. Iran.
Sameti, A. R., & Ghannad, M. A. (2016). Equivalent linear model for existing soil-structure systems.
Int. J. Struct. Stab. Dyn., 16(02), 1450099.
Sbartai, B. (2016). Dynamic interaction of two adjacent foundations embedded in a viscoelastic soil.
Int. J. Struct. Stab. Dyn., 16(03), 1450110.
Scawthorn, C., & Chen, W.-F. (2002). Earthquake engineering handbook. CRC press.
Suita, K., Yamada, S., Tada, M., Kasai, K., Matsuoka, Y., & Shimada, Y. (2008). Collapse
experiment on 4-story steel moment frame: Part 2 detail of collapse behavior. In Proceedings of the 14th
world conference on earthquake engineering, Beijing, China, 1217.
  • تاریخ دریافت 20 فروردین 1403
  • تاریخ بازنگری 25 اردیبهشت 1403
  • تاریخ پذیرش 27 اردیبهشت 1403
  • تاریخ اولین انتشار 27 اردیبهشت 1403
  • تاریخ انتشار 01 مرداد 1403