سال انتشار: ۱۳۹۱

محل انتشار: دهمین همایش بین المللی سواحل، بنادر و سازه های دریایی

تعداد صفحات: ۱۰

نویسنده(ها):

Seyed Amin Vakili – Member Of Organization For Engineering Order Of Building North Khorasan Province
Seyed Ehsan Vakili – Member Of Organization For Engineering Order Of Building North Khorasan Province
Nader Abdoli Yazdi – Department Of Civil Engineering Univrsity Of Yazd, Yazd, Iran
Hasan Azad Beygi – Department Of Civil Engineering Eshragh Higher Education Institute, Nors Khorasan

چکیده:

The aim of this Paper is to treat the elastic stability of reinforced and composite concrete piles. The object of this study is to verify the ability of the Modified Newmark Method to include geometric non-linearity in addition to the non-linearity due to cracking, and also to show the advantage of the established method to reconsider an ignored minor parameter in mathematical modelling, such as the effect of the cracking by extra geometric bending moment(Ny) on cross-section properties. The purpose of this investigation is not to present some new results for the instability of reinforced or composite concrete columns. Therefore, all kinds of non-linearities involved in the problem are not considered here. Only as mentioned, it is a part of the verification of the new established method to solve two kinds of non-linearities ( effect and cracking) together simultaneously. However, the Modified Newmark Method can be used to solve the non-linearity of materials and the time-dependent behaviour of concrete. But since it is out of the scope of this dissertation, it is not considered here, and the review given in the previous section was merely for the