سبد خرید

Ductility Demand Distribution of Asymmetric Multi-Story R/C Buildings

تومان

موجودی: در انبار

To evaluate the influences of the number of stories on the torsional response and ductility demand distribution in the plan and the  height of plan asymmetric RC dual lateral load resistant multi-story buildings, three categories of structural models that contain 8-, 14-  nd 20-stories buildings (with the wide range of eccentricity values) are subjected to an assemblage of ordinary and near-fault  ground motions. The approach of modeling has been used, is more accurate for multi-storey R/C structures, because it redefines the  stiffness from the strength in each time step. According to the findings, the torsional effects, decreases for high-rise structures where  the lateral natural period increases

تعداد:
مقایسه

ABSTRACT

To evaluate the influences of the number of stories on the torsional response and ductility demand distribution in the plan and the  height of plan asymmetric RC dual lateral load resistant multi-story buildings, three categories of structural models that contain 8-, 14-  nd 20-stories buildings (with the wide range of eccentricity values) are subjected to an assemblage of ordinary and near-fault  ground motions. The approach of modeling has been used, is more accurate for multi-storey R/C structures, because it redefines the  stiffness from the strength in each time step. According to the findings, the torsional effects, decreases for high-rise structures where  the lateral natural period increases.

INTRODUCTION

In many buildings, the centers of resistance do not coincide with the centers of mass, resulting even for a purely translational  excitation; the resultants of the stories resisting forces do not pass through the stories centers of mass. When these structures, so- called asymmetric buildings, are subjected to earthquake ground motion, they undergo both translational and rotational motion even though the earthquake excitation is purely uni-direction translational. Most of the conducted work on inelastic seismic response of  asymmetric buildings are performed on simplified, highly idealized, one-storey models, with simple shear-beam elements (mostly three)  esigned for lateral load resistance. Tso and Sadek (1985)  employing such a models resulted that while the inelastic response  s not mainly translational, the ductility demand of the edge lateral resisting elements could be increased up to twice of similar  lements in the symmetric building. Effect of torsion on the stiff and flexible sides is a serious discrepancy in the pervious  studies; some researches such as Tso and Ying (1990)  and Mittal and Jain (1995)  stated the inelastic torsional effects could  lead to critical response in the flexible edge and are not important in the stiff edge, while Chandler and Duan (1991)  explained that  for the models they studied, a critical circumstance would occur in the stiff edge. Tso and Zhu (1992)  in a separate study showed  that these contradictory conclusions could be upon the type of models and assumptions used for their design and the type of  eccentricity.

Year: 2011

Publisher : Sixth National Congress on Civil Engineering

By :  Amir M. Halabian , Mohammad S. Birzhandi

File Information: English Language/ 8 Page / size: 539 KB

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سال : 1390

ناشر : ششمین کنـگره ملی مهنـدسی عمـران

کاری از : امیر محمد خلبان ، محمد سید بیرگندی

اطلاعات فایل : زبان انگلیسی / 8 صفحه / حجم : KB 539

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