A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Anchors to Masonry in Seismic Conditions: Cracked vs. Uncracked Locations
https://orcid.org/http://orcid.org/0000-0002-4891-7091
The structural use of metallic anchors to masonry is increasing world-wide. Interventions to existing masonry structures in seismic areas is a field of interest, as in several applications anchors are needed, e.g., to connect a diaphragm to walls, to improve the connection between bearing walls, etc. In seismic applications, there is a high probability for occurrence of cracks in the substrate, crossing the anchor or in its vicinity. To investigate the effect of cracks on the maximum resistance of anchors in tension and in shear, as well as their effect on the response degradation due to simulated seismic loading, an experimental campaign was performed at NTUA.
In this paper, the specimen, the experimental setup and the investigated parameters are briefly presented, along with relevant experimental results. A commercially available metal injection anchor system using steel anchor rods, 12 mm in diameter, and a hybrid mortar was post-installed to solid brick masonry in mortar joint locations. The embedment length was equal to either 100 mm or 180 mm. The wall specimens were either free of cracks or deliberately cracked before load application to the anchors. Monotonic and quasi-static displacement-controlled tests under load variation were performed in tension or in shear. The experiments have shown significant effect of cracking under monotonic loading. Further reduction was recorded in case of repeated loading for tension and cyclic loading for shear. The two adverse conditions, namely, seismic cracking and loading, lead to a reduction of the anchor capacity to be accounted for in seismic design.
Anchors to Masonry in Seismic Conditions: Cracked vs. Uncracked Locations
https://orcid.org/http://orcid.org/0000-0002-4891-7091
The structural use of metallic anchors to masonry is increasing world-wide. Interventions to existing masonry structures in seismic areas is a field of interest, as in several applications anchors are needed, e.g., to connect a diaphragm to walls, to improve the connection between bearing walls, etc. In seismic applications, there is a high probability for occurrence of cracks in the substrate, crossing the anchor or in its vicinity. To investigate the effect of cracks on the maximum resistance of anchors in tension and in shear, as well as their effect on the response degradation due to simulated seismic loading, an experimental campaign was performed at NTUA.
In this paper, the specimen, the experimental setup and the investigated parameters are briefly presented, along with relevant experimental results. A commercially available metal injection anchor system using steel anchor rods, 12 mm in diameter, and a hybrid mortar was post-installed to solid brick masonry in mortar joint locations. The embedment length was equal to either 100 mm or 180 mm. The wall specimens were either free of cracks or deliberately cracked before load application to the anchors. Monotonic and quasi-static displacement-controlled tests under load variation were performed in tension or in shear. The experiments have shown significant effect of cracking under monotonic loading. Further reduction was recorded in case of repeated loading for tension and cyclic loading for shear. The two adverse conditions, namely, seismic cracking and loading, lead to a reduction of the anchor capacity to be accounted for in seismic design.
Anchors to Masonry in Seismic Conditions: Cracked vs. Uncracked Locations
https://orcid.org/http://orcid.org/0000-0002-4891-7091
The structural use of metallic anchors to masonry is increasing world-wide. Interventions to existing masonry structures in seismic areas is a field of interest, as in several applications anchors are needed, e.g., to connect a diaphragm to walls, to improve the connection between bearing walls, etc. In seismic applications, there is a high probability for occurrence of cracks in the substrate, crossing the anchor or in its vicinity. To investigate the effect of cracks on the maximum resistance of anchors in tension and in shear, as well as their effect on the response degradation due to simulated seismic loading, an experimental campaign was performed at NTUA.
In this paper, the specimen, the experimental setup and the investigated parameters are briefly presented, along with relevant experimental results. A commercially available metal injection anchor system using steel anchor rods, 12 mm in diameter, and a hybrid mortar was post-installed to solid brick masonry in mortar joint locations. The embedment length was equal to either 100 mm or 180 mm. The wall specimens were either free of cracks or deliberately cracked before load application to the anchors. Monotonic and quasi-static displacement-controlled tests under load variation were performed in tension or in shear. The experiments have shown significant effect of cracking under monotonic loading. Further reduction was recorded in case of repeated loading for tension and cyclic loading for shear. The two adverse conditions, namely, seismic cracking and loading, lead to a reduction of the anchor capacity to be accounted for in seismic design.
Anchors to Masonry in Seismic Conditions: Cracked vs. Uncracked Locations
Lecture Notes in Civil Engineering
Ilki, Alper (editor) / Çavunt, Derya (editor) / Çavunt, Yavuz Selim (editor) / Vintzileou, Elizabeth (author) / Tselios, Ioulios (author) / Welz, Georg (author) / Karagiannaki, Despoina (author)
International Symposium of the International Federation for Structural Concrete ; 2023 ; Istanbul, Türkiye
2023-06-03
10 pages
Article/Chapter (Book)
Electronic Resource
English
Behaviour of plastic anchors in cracked and uncracked concrete
| British Library Conference Proceedings | 2001
Constitution of cracked and uncracked asphalts
| Engineering Index Backfile | 1937
Pullout Strength Models for FRP Anchors in Uncracked Concrete
| Online Contents | 2010
FRP Adhesion in Uncracked and Cracked Concrete Zones
| British Library Conference Proceedings | 2003