An Experimental Study of Seismic Retrofit on the Viaduct Bridge of Rail Transit

Abstract

Earthquake damage of viaduct bridge of railroad may give rise to social loss due to transport restrictions greater than cost of structural recovery. Therefore, viaduct bridge of railroad should have ensure adequate seismic performance. But, results of seismic performance evaluation, many of seismic retrofit was required. In this study, five scale models of columns were made and four of them were reinforced by HT-A(HyperTex & perforate Aluminum) which is improved than existing method. Testing the columns by constant axial load and cyclic lateral displacements, seismic performance of columns has been verified from the result of evaluating the stiffness, ductility and energy dissipation capacity.

Influences of Ca Doping and Oxygen Vacancy upon Adsorption of CO on the LaFeO3 (010) Surface: A First-Principles Study

“…The change of the electrical conductivity upon exposure to reducing gases of semiconducting materials has been used for gas detection. The metal oxide semiconductors such as SnO 2 and ZnO have been studied for a long time for detecting CO gas. , Recently, for CO sensor development, several metal oxides with the perovskite structure such as LaFeO 3 have been found to show gas-sensing properties to CO. − The sensitivity of this kind of sensor can be significantly improved by selecting suitable doping materials such as Ca, , Sr, − and Pb. , …”

Adsorption of CO on M-doped(M = Ca, Ce and Pr) Monoclinic Zirconia(111) Surface: A First-Principles Study

“…And it is found that the adsorption capacity of carbon monoxide on pure zirconia is very poor, doping is an effective way to improve the adsorption capacity of carbon monoxide on the zirconia [4]. There are theoretical researchs show that the adsorption capacity of carbon monoxide improved by using Ca doping LaFeO 3 [5]. Experimental studies show that Ce doping zirconia can also increase the adsorption capacity of carbon monoxide on the zirconia [6].…”