دانلود رایگان مقاله انگلیسی یک اصل جدید برای طرح لرزه ای مبتنی بر انرژی قاب خمشی فولادی - اشپرینگر 2017

عنوان فارسی
یک اصل جدید برای طرح لرزه ای مبتنی بر انرژی قاب های خمشی فولادی
عنوان انگلیسی
A new methodology for energy-based seismic design of steel moment frames
صفحات مقاله فارسی
0
صفحات مقاله انگلیسی
22
سال انتشار
2017
نشریه
اشپرینگر - Springer
فرمت مقاله انگلیسی
PDF
کد محصول
E6756
رشته های مرتبط با این مقاله
مهندسی عمران
گرایش های مرتبط با این مقاله
سازه و زلزله
مجله
مهندسی زلزله و مهندسی لرزه - Earthquake Engineering and Engineering Vibration
دانشگاه
Michael Baker International - Hamilton - USA
کلمات کلیدی
طراحی لرزه ای مبتنی بر انرژی؛ توزیع انرژی هیسترتیک؛ سیستم های MDOF؛ قاب خمشی فولادی؛ طراحی بهینه سازی
چکیده

Abstract:


A procedure is proposed whereby input and hysteretic energy spectra developed for single-degree-of-freedom (SDOF) systems are applied to multi-degree-of-freedom (MDOF) steel moment resisting frames. The proposed procedure is verifi ed using four frames, viz., frame with three-, fi ve-, seven- and nine-stories, each of which is subjected to the faultnormal and fault-parallel components of three actual earthquakes. A very good estimate for the three- and fi ve-story frames, and a reasonably acceptable estimate for the seven-, and nine-story frames, have been obtained. A method for distributing the hysteretic energy over the frame height is also proposed. This distribution scheme allows for the determination of the energy demand component of a proposed energy-based seismic design (EBSD) procedure for each story. To address the capacity component of EBSD, a story-wise optimization design procedure is developed by utilizing the energy dissipating capacity from plastic hinge formation/rotation for these moment frames. The proposed EBSD procedure is demonstrated in the design of a three-story one-bay steel moment frame.

نتیجه گیری

10 Summary and conclusion


To apply energy-based seismic design procedures to MDOF systems, the input and hysteretic energy spectra developed for SDOF systems need to be extended. In this paper, a procedure for estimating input and hysteretic energies for MDOF systems from equivalent SDOF systems was proposed and verifi ed. Furthermore, a distribution scheme for distributing the hysteretic energy over the height of a multistory steel moment frame was proposed. The proposed scheme is based on work done by the modal forces as they act through the corresponding story displacements, and requires the designer to compute the modal forces for each mode using any existing procedure, apply these forces to the frame, and calculate the displacements due to these modal forces. A comparison of this proposed hysteretic equation with the actual hysteretic energy distribution from a pushover analysis showed that the proposed equation gave rather good results.


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