الفهرس | Only 14 pages are availabe for public view |
Abstract Reinforced Concrete (RC) shear wall, is an effective primary earthquake resisting system in tall buildings due to strong stiffness and large shear-force resisting capacity. Shear walls may be provided with openings due to the functional requirements of the building. The size and location of openings may play a significant role in the response of shear walls. Though it is a well-known fact that the size of openings affects the structural response of shear walls significantly, there is no clear consensus on the behavior of shear walls under different opening locations. The work presented in this thesis aims to study the dynamic behavior of shear walls under various opening locations and distributions by performing an experimental program on four reinforced concrete walls subjected to lateral concentered load 100 mm from the top of the wall. The shear wall specimens have dimensions of 1000 mm width, 150mm thickness, and 2000mm height. The Specimens were titled as follows: (Wall1) for solid wall, (Wall2) for wall with a central opening (500mm× 500mm), (Wall3) for wall with two vertical central openings (250mm×500mm), and (Wall4) for wall with two horizontal central openings (250mm×500mm). All walls have the same flexural longitudinal reinforcement. The ultimate failure load, cracking pattern, load-displacement, and load-strain were recorded for each of the wall specimens and a comparison between the results of different walls was conducted. from the results obtained, it was observed that the use of two horizontal openings are an effective approach to enhance the stiffness of reinforced concrete shear wall when an opening is required. Abstract Another approach was used to analyze the tested walls specimens and verify their results using the nonlinear finite element method. ANSYS19 was used as it gives the insight to understanding the parameter that affects the results; predicting the cracking and failure modes properly. The program was used to verify the tested specimens as well as proposing different openings in shear walls for additional possible design requirements. The finite element models were divided into three groups of similar possible design requirements a comparison between the test result and ANSYS outputs was also presented. The groups were made to simulate and choose the optimum area, positioning, and orientation for window, ducts, and door-sized openings. Outputs include the ultimate failure load, cracking pattern, load-displacement graphs. The ANSYS program showed good agreement with the experimentally tested walls as the difference between both the analytical and the theoretical model did not exceed 20%. |