Steel fiber reinforced concrete (SFRC) has many good dynamic performances such as toughness and ductility. However, few studies have focused on SFRC’s application in bearing member of bridge structures. In this paper, pseudo-static cyclic tests of eight pier specimens are carried out to investigate seismic behavior of piers using SFRC. The main variables in the testing are the steel fiber content (volume fraction of 0.0%, 0.5%, 1.0% and 1.5%), the length of SFRC region and the stirrup ratio of piers. Seismic behavior of the test specimens, like the failure pattern, the hysteretic characteristics, the skeleton curves, the ductility and the energy dissipation are investigated experimentally. The results show that, 1) the SFRC pier with the steel fiber volume fraction of 1.0% has much better performance than that with other fiber volume contents, particularly for bearing capacity, hysteretic energy dissipation and ductility; 2) the pier specimen can keep sufficient seismic capacity, in which some stirrups are replaced by steel fibers; and 3) compared with specimen with application of SFRC in entire pier, the specimen with appropriate local application of SFRC in potential plastic hinge region can sustain almost the same seismic properties, such as the ultimate bearing capacity, the stiffness, the ductility and the energy dissipation capacity.

Molecular dynamics simulation has been employed to investigate the adsorption behavior of glutamic acid and aspartic acid on Cu (001) surface, and the inhibition mechanism was also discussed. The results indicated that the two corrosion inhibitors could both adsorb on the Cu surface firmly due to the interaction between polar groups and surface. The two inhibitors both have excellent corrosion inhibition performance. However, the inhibition performance of glutamic acid is better than aspartic acid.

A systematic synthesis approach for floating gyrators employing single z-copy current-controlled current conveyor trans-conductance amplifier (CCCCTA) is presented in this work. Initially, the pathological models of two types of the CCCCTA, namely z-copy z +-output CCCCTA (CCCCTA+) and z-copy z −-output CCCCTA (z-copy CCCCTA−), are derived by virtue of the nodal admittance matrix (NAM) expansion method. Moreover, these models are then used in the synthesis of floating gyrator using single z-copy CCCCTA. Two floating gyrators are acquired by expanding the NAM of floating gyrator. The synthesised gyrators employ one z-copy CCCCTA and a grounded admittance. Adjusting bias currents of the CCCCTA can tune the parameter of the gyrators. The hand analysis and PSPICE simulation show that the used synthesis method is simple, systematic and valid.