Mass Participation Factor in Defining Non-classical Range of Behavior for Mass Isolated Systems

نویسندگان

  • M. Ziyaeifar and M. Ghafory-Ashtiany
  • Sh. Tavousi
چکیده مقاله:

The new techniques in seismic design of structures are usually attributed to high damping ratios. In such systems, the assumption of classical (i.e. proportional) damping is not valid and in most cases they should be considered as Non-classical systems. Since the analytical tools for studying the behavior of such structures are not easily available, the present work attempts to find the limits, in which, a non-classical system can be approximated as a classical one. This is accomplished, first, by introducing the mass participation factor for non-classical systems. Subsequently, a relevant spectrum analysis technique such systems is developed. Using the spectrum analysis technique, the limitation of damping ratios in which two different types of Mass Isolated structures can be approximated as classical ones are determined. The results indicate that in the usual range of damping capacity for such structures, a well distribution of dashpots along the height of the system considerably reduces the non-classical characteristics of the structure.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

An Isolated Mass in the Palm, Starting Manifestation of Sarcoidosis

  Sarcoidosis is a systemic disease that is characterized with noncaseating granulomatous nodules which present in multiple organs specially lungs (90%) . Incidence of masses due to Sarcoidosis in upper extremity is low and most cases present in association with involvement of pulmonary hilary lymph nodes. In this article we present a rare case of Sarcoidosis which presented as a single soft ti...

متن کامل

Investigation of Vibrational Behavior of Perfect and Defective Carbon Nanotubes Using Non–Linear Mass–Spring Model

In the present study, the effects of arrangement and distribution of multifarious types of defects on fundamental frequency of carbon nanotubes are investigated with respect to different chirality and boundary conditions. Interatomic interactions between each pair of carbon atoms are modeled using two types of non–linear spring–like elements. To obtain more information about the influences of d...

متن کامل

Calculation of tunnel behavior in viscoelastic rock mass

Wall displacements and ground pressure acting on the lining of a tunnel increase with time. These time-dependent deformations are both due to face advance effect and to the time-dependent behavior of the rock mass.  Viscoelastic materials exhibit both viscous and elastic behaviors. Thorough this study, the effect of different linear viscoelastic models including Maxwell, Kelvin and Kelvin-Voigt...

متن کامل

The Role of Mass Media in the Development of Private Sector Participation in Sports

In the present research, the role of the mass media in the development of private sector participation in Mazandaran Province sports was studied. For this purpose, a sample of 130 individuals consisting of sports experts and managers and media executives participated in the survey. In the poll process, a researcher-made questionnaire was utilized after its content validity was confirmed by a nu...

متن کامل

Mass participation user trials

This thesis investigates how researchers can take advantage of the rapid adoption of mobile technology that has brought with it transformations in social and cultural practice; the expectations of what computers are, what they can do, and the role of digital objects in everyday life. In particular this thesis presents and discuses the use of new App Store style software distribution methods to ...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


عنوان ژورنال

دوره 24  شماره 2

صفحات  29- 49

تاریخ انتشار 2006-01

با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.

کلمات کلیدی

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023