The electron microscopy images of the NCS that strengthened layer of the steel 45 from a depth of 10 and 15 μm are presented in Fig. 2a, b.
A nonlinear finite element model of the reinforced structure is developed in order to quantify the effectiveness of the GFRCM strengthening layer and to derive the convenient position of the optic fibers for a correct monitoring of the reinforced vault.
This paper presented a experimental investigation into the advantage of RC member with shear strengthening using strain hardening cementitious composites (SHCC), focused on the crack pattern of SHCC strengthening layer and its obvious advantage for increasing the shear load carrying capacity of the strengthened RC member.
A preliminary study on the mechanical performances of the strengthening layer is performed by selecting three different mortar grades for the FRCM and testing these under flexure and compression.
In the present study, ten specimens were tested experimentally, which divided into two major groups, each group contains five specimens, one as a control and four strengthened with constant UHP-SHCC layer thickness having variable reinforcement ratios embedded in the middle of the strengthening layer.
It has been successfully coated on the surface of stainless steel as the strengthening layer.
The investigated parameters were: (a) the strengthening material, namely TRM versus FRP, (b) the number of strengthening layers, (c) the textile surface condition (dry and coated), (d) the textile material (carbon, basalt or glass fibres) and (e) the end-anchorage of the flexural reinforcement.
Some reference is made to approaches in considering the load-carrying capacity of the strengthening layers made of HPFRCCs.
"While there is no specific threat at this time," according to the statement, the agency has instituted the new screening measure "to enhance our existing explosives detection capabilities and further strengthen our layers of security".
The parameters considered were the number of strengthening layers (one or two layers, applied on both sides), the type of grid (open mesh structures comprising carbon, glass or basalt fibers and polypropylene or polyester), the type of bonding agent (mortars of different compositions or epoxy resin) and the compressive stress level applied to specimens undergoing in-plane loading.
