This study presents the results of an experimental campaign aimed at testing effectiveness carbon fiber reinforced cementitious matrix (CFRCM) confinement as a repair technique for severely damaged concrete (RC) columns. To evaluate shape effect and transverse steel reinforcement (TSR) – interaction, two different cross-section shapes, TSR rates were investigated. Nine full-scale specimens anal...

Strong vertical ground motions can significantly alter axial forces in a bridge column. Axial force variations also affect the concrete contribution to the shear capacity of a reinforced concrete (RC) member. However, the effect of axial force demands on shear capacity is a fairly complex issue since the shear demand in an RC bridge column is affected by variations in the axial force. A combine...

Hoxc family transcription factors are expressed in different domains along the rostrocaudal (RC) axis of the developing spinal cord and they define RC identities of spinal neurons. Our previous study using an in vitro assay system demonstrated that Fgf and Gdf11 signals located around Hensen's node of chick embryos have the ability to induce profiled Hoxc protein expression. To investigate the ...

Reinforced concrete (RC) columns can be effectively rehabilitated or strengthened by externally bonded fiber-reinforced polymer (FRP) wraps, which improve the axial load capacity and ductility of these through a confinement effect. Modern design codes require that seismically designed RC have significant minimum amounts both longitudinal transverse steel. This steel apply considerable confining...

The aim of this study is to analytically assess the seismic performance reinforced concrete (RC) columns with interlocking hoops using a novel damage index, and provide data for developing next generation design criteria. Interlocking are used in rectangular or non-circular columns, splices shall be located column interior. Seismic RC controlled by level confinement provided transverse steel. c...

Bridges are often built in locations susceptible to multiple extreme hazards. Meeting some or all of these constraints drives the development of innovative multi-hazard design concepts. This paper presents the results of research conducted to develop and experimentally validate such multi-hazard bridge pier concepts. The first concept is a pier-bent made of concrete filled steel tube columns. F...

Modeling parameters (MP) of reinforced concrete columns are a critical component performance-based seismic assessment methodologies because in these approaches damage is estimated based on element deformations calculated using non-linear models. To ensure model fidelity and consistency results, methods ASCE 41, ACI 369.1, 374.3R prescribe modeling calibrated experimental data. This paper introd...