Seismic analysis of beam-type bridges in Sudan

مقدم أطروحة جامعية

Maglad, Ahmad Mustafa Mahmud

مشرف أطروحة جامعية

Husayn, Ahmad Qasim Mahmud
Shaban, Ibrahim Jalal

الجامعة

جامعة أم درمان الإسلامية

الكلية

كلية العلوم الهندسية

القسم الأكاديمي

قسم الهندسة المدنية

دولة الجامعة

السودان

الدرجة العلمية

دكتوراه

تاريخ الدرجة العلمية

2012

الملخص الإنجليزي

In this thesis seismic analysis of beam-type bridges in Sudan was studied. Burri, al Manshia and al Damer Bridges were taken as case studies to investigate seismic effects.

The first two bridges were constructed at Khartoum State in the years 1972 and 2001 respectively.

The third bridge was constructed at River Nile State in the year 2008.

The selected bridges represent prestressed concrete box and I-Girder beam-type bridges. Finite Element models for the three bridges were built. The seismic analysis was performed by two methods, direct integration time history analysis and response spectrum analysis. The Response Spectrum for Central Khartoum, Sudan proposed by Y.

Mohamedzein, et al.

[7] was considered for the analysis. A SIMQKE [6] program was used to artificially simulate earthquake motions compatible with the prescribed response spectra. A computer program has been developed in MATLAB and was used to analyze the problem under research.

The Commercial Structural Analysis SAP2000 program [11] was also used for the comparative study and it was found that it gave typical results.

The developed software has been found to be efficient, reliable and easy to apply. It was found that bridge response in terms of displacements, shear and moments was directly proportioned to the peak ground acceleration (PGA). Also it was found that time history analysis and response spectrum analysis almost gave the same results. Due to the ease of implementation, the response spectrum method is recommended for the evaluation of seismic effects on the studied bridge types. Where nonliterary may exist such in piers and abutments it is recommended to use nonlinear time history analysis to evaluate seismic effects. For future research it is recommend to design response spectra for other areas of Sudan.

Also it is recommended to make use of the developed software for other types of bridges.

التخصصات الرئيسية

الهندسة المدنية

الموضوعات

• الجسور
• السودان

عدد الصفحات

209

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-366253