الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The main purpose of this report is to study the seismic behaviour of reinforced concrete structures with regularity provided with shear walls as a lateral load resisting system.
The study uses the Drift Control Concept to ensure that the Inter-Story Drift is within the allowable limits of the Egyptian code 2003, (ECP-201). The minimum required shear walls Inertia is obtained to ensure Drift Limits.
Two methods were used according to the Egyptian code:
A- The Equivalent Static Load Analysis Method (E.S.L.A.M); [Simple modal method].
B- The Response Spectrum Analysis Method (R.S.A.M); [Multi modal method].
A relation between the Total Height of the building and the required wall section was obtained by satisfying the Egyptian code drift limits for both the two mentioned methods. All the different soil classes are included in the study.
A study was prepared to check the obtained sections using the Response Spectrum Analysis Method if the building is exposed to a real earthquake record using the Linear Time History Analysis Method (T.H.A.M).
The study considers the inelastic behavior of the shear wall using The Non linear Static Pushover Analysis. The Response Modification factor (R) was calculated and compared to the code values.
From the results of the analytical work presented in this study, conclusions are obtained:
1- A parametric study was performed to obtain a general relation between the Total Height of the building and the required minimum shear wall sections satisfying the code Inter-story Drift limits using the Equivalent Static Load Method of Analysis and the Response Spectrum Method of Analysis.
2 - The results of the two methods of analysis show that the minimum required shear wall inertia obtained using the response spectrum method of analysis is less than those obtained using the equivalent static load method of analysis by a remarkable percentage.
3- The study proves that the minimum required shear wall inertia satisfying the code drift limits obtained using the Response Spectrum Analysis Method is also satisfying the Egyptian code 2003 (ECP-201) when these sections checked using the Time History Method of Analysis.
4- The study clears that the confinement of shear walls by closely spaced transverse reinforcement in the form of closed stirrups improves greatly the ductility of the reinforced concrete shear walls.
5- The Response Modification factor (R) was obtained and compared to the Egyptian code values using the Non linear Static Pushover Analysis.