Seismic performance of bridges with high strength concrete columns reinforced with SMA-FRP jackets

Abstract

Despite its great potential, the use of high strength concrete (HSC) in bridge columns raises concerns associated with the intrinsic brittleness of the material and the insufficient lateral deformation capacity of the columns under seismic loading. To ensure the ductile response of HSC columns, this paper proposes and studies an innovative hybrid confinement method which provides traditional passive confinement combined with thermally triggered active confinement by using fiber-reinforced polymer (FRP) sheets and shape memory alloy (SMA) spirals together. The compressive behavior of HSC confined with the hybrid (SMA-FRP) jackets are experimentally investigated at the material level, and implemented in seismic analysis of a bridge system with HSC columns within a new simulation framework, named material testing integrated simulation. The hybrid confinement jackets show greater performance in improving the compressive behavior of HSC, compared to conventional FRP jackets. The simulation results indicate that the hybrid jackets can effectively protect the plastic hinge regions of HSC columns, and significantly enhanced the capability of the bridge to accommodate strong ground motions as well as large lateral deformations.

Review on seismic resilient bridge structures

“…(as shown in Figure 9(f)). Many researchers have conducted a lot of theoretical and experimental studies on the behavior hysteretic of the SMA or the different types of SMA components for the application in the bridge engineering (Choi et al, 2020; Fang et al, 2021; Jung et al, 2019; Li et al, 2012; Schranz et al, 2021; Sza et al, 2021; Zhang et al, 2021). Structural vibration control using SMA is mainly divided into two groups: active control and passive control.…”

Efficiency of shape memory alloy seismic restrainers for several conditions of bridge joints

“…SMA has been widely used in mechanical, aerospace, and electrical engineering in addition to medical applications. A lot of research has also been done recently on their investigation within civil structural systems [7,8,9]. Some experimental advancements are as follows:…”

“… When seismic occurrences cause vibrations in the structures, SMA can be used as a tension/compression device in a building's bracing system for advantageous stiffness properties [14];  Using SMA as a concrete-wire-jacket to enhance concrete confinement [7,15]. The main goal of this study is to shed some light on the advantages and efficiency of the aforementioned energy dissipation devices (SMAs) for restraining joint-opening in several cases of bridges and different conditions of seismic excitation using verified software programs that were prepared using MATLAB.…”

Enhancing Mechanical Behavior and Energy Dissipation in Fiber-Reinforced Polymers through Shape Memory Alloy Integration: A Numerical Study on SMA-FRP Composites under Cyclic Tensile Loading

“…SMAs are applied in different fields such as biomedical, aerospace, and civil structures [ 15 ]. In civil structures, different shapes of SMAs are used for the retrofitting and strengthening of structures, such as application in seismic isolators [ 16 , 17 , 18 , 19 ], steel beam–column connections [ 20 , 21 , 22 ], bracing systems [ 23 , 24 , 25 , 26 , 27 ], different types of dampers [ 28 , 29 , 30 , 31 ], reinforced concrete beams [ 32 , 33 , 34 ], reinforced concrete columns [ 35 , 36 , 37 , 38 , 39 , 40 , 41 ], reinforced concrete slabs [ 42 ], reinforced concrete beam–column connections [ 43 , 44 , 45 , 46 ], and wood structures [ 47 , 48 ].…”