A S T U D Y O F T H E I N T E R A C T I O N O F S O I L-U N R E I N F O R C E D B A S E M E N T W A L L S
Author(s):
Abstract:
Fundamentally, the stability of masonry structures is dependent on the soil-basement wall interaction. Due to the ease of calculation and design of retaining walls by the quasi-static method of Mononobe-Okabe (M-O), this method has been widely used. However, the results of numerical models and experimental data have shown that this method is not very accurate, and the design is either very conservative or is unsafe. Since, in Iran, the use of masonry structures without reinforcement is predominant, in this study, the dynamic interaction between soil and masonry walls has been evaluated. This study has been conducted utilizing a 2D Plane Strain Finite Element Model. The behavior of the wall before cracking is idealized as elastic plate. After cracking, the strength of the wall drops very quickly, and, in this case, the remaining strength can be ignored, which can be assumed as having collapsed. Considering the geotechnical aspects that normally occur in practice, they have been simulated to produce the state of rest ($k_{o}$) in backfill soil for a static situation. This state of stress has been selected for the initial condition in dynamic analysis. Dynamic displacement excitation is applied in a sinusoidal form at bed rock level by three cycles with different frequencies, but with the same peak acceleration in each case equal to 0.3g. The effect of excitation frequency, soil type, height, and the ratio of height to thickness in the wall was evaluated using the maximum bending moment of the wall ($M_{max}$) as a criterion for the wall performance. The numerical results show that the effect of the shear wave velocity of the soil and excitation frequency on the dynamic response of the basement wall cannot be ignored. However, these factors are overlooked in the M-O method. This study has also demonstrated that the dynamic interaction of the soil and basement walls is necessary to consider parameters, such as: dynamic excitation frequency, soil type, and geometry of the wall.
Keywords:
Language:
Persian
Published:
Sharif Journal Civil Engineering, Volume:31 Issue: 2, 2015
Pages:
79 to 86
magiran.com/p1454644
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!