TY - JOUR N2 - This investigation is carried out to evaluate the repair and strengthening the techniques of elliptical paraboloid reinforced concrete shells with openings. An experimental program of several different techniques in repair and strengthening is executed. The materials, which are considered for strengthening, are; Glass fiber reinforced polymers GFRP at different position of the shell bottom surface, steel strip and external tie. They loaded by four concentrated loads affected on the corners of the opening. The initial and failure loads as well as the crack propagation for the tested shells at different loading stages, defl ections and failure load for repaired and shells are recorded. A non-linear computer program based on finite element techniques is used to study the behavior of these types of shells. Geometric and materials nonlinearities are considered in the analysis. The efficiency and accuracy of computer program are verified by comparing the program results with those obtained experimentally for the control shell with opening and strengthened shells. L1 - http://www.journals.pan.pl/Content/83894/mainfile.pdf L2 - http://www.journals.pan.pl/Content/83894 PY - 2013 IS - No 3 EP - 420 KW - Shell KW - Opening KW - Repair KW - strengthening KW - Reinforced KW - Concrete A1 - Meleka, N.N. A1 - Safan, M.A. A1 - Bashandy, A.A. A1 - Abd-Elrazek, A.S. PB - WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES DA - 30.09.2013 T1 - Repairing and Strengthening of Elliptical Paraboloid Reinforced Concrete Shells with Openings SP - 401 UR - http://www.journals.pan.pl/dlibra/publication/edition/83894 T2 - Archives of Civil Engineering ER -