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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Engineered cementitious composites for strengthening masonry infilled reinforced concrete frames
Highlights Engineered cementitious composite (ECC) is used to strengthen infilled RC frames. Seismic behavior of the un-retrofitted and retrofitted infilled frames is compared. Effect of ECC layers on the seismic parameters of infilled frame is analyzed. ECC increases the lateral strength and energy absorption capacity of infilled frame. Examining drift levels shows some damages can be postponed to higher drifts.
Abstract The results of the second part of a comprehensive experimental program, aimed at investigating the behavior of masonry infilled reinforced concrete (RC) frames strengthened with fiber reinforced engineered cementitious composites (ECC) used as an overlay on the masonry wall, are presented in this paper. The proposed strengthening technique aims at increasing the lateral strength of infilled RC frames and maintaining the integrity of masonry infills during loading, which is an important seismic parameter for these elements. Material tests were conducted first for ECC in order to assess its distinctive mechanical properties such as tensile stress–strain behavior and multiple cracking. Thereafter, three 1/2 scaled one bay, one story RC specimens were constructed and tested under quasi-static lateral loading. The obtained results are presented and discussed in terms of the strength, stiffness, and the cumulative absorption capacity of the tested specimens. Furthermore, the obtained backbone curves are idealized and the drift limits usually considered in seismic design are specified. The obtained results indicate that the proposed ECC-strengthening technique can effectively increase the lateral strength and energy absorption capacity of the infilled frame, prevent brittle failure modes in the infill wall, and provide a reasonable system overstrength.
Engineered cementitious composites for strengthening masonry infilled reinforced concrete frames
Highlights Engineered cementitious composite (ECC) is used to strengthen infilled RC frames. Seismic behavior of the un-retrofitted and retrofitted infilled frames is compared. Effect of ECC layers on the seismic parameters of infilled frame is analyzed. ECC increases the lateral strength and energy absorption capacity of infilled frame. Examining drift levels shows some damages can be postponed to higher drifts.
Abstract The results of the second part of a comprehensive experimental program, aimed at investigating the behavior of masonry infilled reinforced concrete (RC) frames strengthened with fiber reinforced engineered cementitious composites (ECC) used as an overlay on the masonry wall, are presented in this paper. The proposed strengthening technique aims at increasing the lateral strength of infilled RC frames and maintaining the integrity of masonry infills during loading, which is an important seismic parameter for these elements. Material tests were conducted first for ECC in order to assess its distinctive mechanical properties such as tensile stress–strain behavior and multiple cracking. Thereafter, three 1/2 scaled one bay, one story RC specimens were constructed and tested under quasi-static lateral loading. The obtained results are presented and discussed in terms of the strength, stiffness, and the cumulative absorption capacity of the tested specimens. Furthermore, the obtained backbone curves are idealized and the drift limits usually considered in seismic design are specified. The obtained results indicate that the proposed ECC-strengthening technique can effectively increase the lateral strength and energy absorption capacity of the infilled frame, prevent brittle failure modes in the infill wall, and provide a reasonable system overstrength.
Engineered cementitious composites for strengthening masonry infilled reinforced concrete frames
Dehghani, Ayoub (Autor:in) / Nateghi-Alahi, Fariborz (Autor:in) / Fischer, Gregor (Autor:in)
Engineering Structures ; 105 ; 197-208
09.10.2015
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Behavior of Masonry-Infilled Nonductile Reinforced Concrete Frames
| British Library Online Contents | 2002
Behavior of Masonry-Infilled Nonductile Reinforced Concrete Frames
| Online Contents | 2002