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Two promising retrofit techniques, external wrapping of CFRP and grouted jacket, were adopted here.
Carbon fiber reinforced polymer (CFRP) composite external wrapping has become an increasing popular strengthening and confining method for deteriorated or damaged concrete structures.
The pretension of the external wrapping achieved in this study, resulted in the prolongation of the elastic response of the column by 40% in terms of load.
Special mechanical devices were constructed in order to apply pretension on the external wrapping and compare their response with the columns without pretension.
External wrapping of fiber reinforced polymer (FRP) materials is a widely applied method for the seismic retrofit of reinforced concrete (RC) columns.
The novel pretension technique showed a satisfactory performance throughout loading while high pretension levels could be achieved without friction between the external wrapping and the concrete column.
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Coordinate laparoscopic external aortic wrapping and stent-grafting is feasible in a porcine model.
Moreover, stiffness of the strengthened columns is increased significantly due to the restraint offered by the external CFRP wrapping on hoop deformations during compressive loading.
This $60 external battery wraps around the iPhone and stays adhered to it, thanks to mini-suction cups.
The purpose of this study is to evaluate the feasibility of using an external aortic wrap in conjunction with an endovascular graft and to examine the histological response.
Furthermore, confining the FSRC column with external CFRP wraps was effective in delaying the crushing of internal CFRP bars and reducing the post-earthquake residual displacement.
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