The Use of Bolted Side Plates for Shear Strengthening of RC Beams: A Review

Liu, Xin; Lu, Zheng; Li, Ling‐Zhi

doi:10.3390/su10124658

Cited by 15 publications

(8 citation statements)

References 34 publications

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“…These campaigns are developed by replacing damaged structural elements depending on the damage degree, wrapping of elements with fiber reinforced polymers of carbon (CFRP) and other retrofitting materials/techniques (e.g. Rossetto et al 2014;Wang et al 2017;Rodrigues et al 2018;Liu et al 2018;Gkournelos et al 2021). One significant limitation on the seismic design of MRFs is their flexible behavior under seismic conditions and peak story drifts.…”

Section: A) B)mentioning

confidence: 99%

Seismic floor acceleration and energy absorption comparison on residential framed buildings with typical retrofitting and combined with nonlinear dampers

Preciado

2023

Preprint

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Here is analyzed the seismic performance of typical 15-story framed buildings of reinforced concrete in original state and retrofitted with different stiff solutions and combined with passive dampers by fast nonlinear time-history analyses. The investigated conventional retrofitting solutions are infill masonry panels, diagonal/Chevron braces, rigid cores and passive dampers (fluid viscous and solid viscoelastic). It is compared the floor shear/bending distribution, peak floor acceleration, seismic energy dissipation and device’s hysteretic performance. The flexible behavior of the unretrofitted building was corrected with stiff retrofitting solutions, but, conversely, the peak floor accelerations were amplified (25–64%). Compared to conventional stiff solutions, the dampers allowed a reduction of distortions (floors 2–12), where the original building showed excessive flexibility. Viscoelastic dampers exhibited acceleration reductions on floors 4–12 (43%) and amplifications on top floors (15%). Conversely, fluid viscous dampers showed more acceleration reductions on almost all floors of 55% and less amplifications on top floors. The energy absorption effectiveness of the devices depended on the location, number of devices, shear forces and peak floor accelerations flow, especially when analyzed without dampers (only with stiff retrofitting). Fluid viscous dampers showed a better performance in terms of seismic energy absorption if compared to the combinations with viscoelastic dampers.

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Section: A) B)mentioning

confidence: 99%

Seismic floor acceleration and energy absorption comparison on residential framed buildings with typical retrofitting and combined with nonlinear dampers

Preciado

2023

Preprint

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“…In steel jacketing, the RC section is enlarged by welding or bolting it with a steel section [15], where the gap between the concrete and steel is filled with grout. The method is effective in enhancing the seismic performance of the column but is generally costly, labor intensive and involves antirust work.…”

Section: Steel Jacketingmentioning

confidence: 99%

Strengthening and Repair of Reinforced Concrete Columns by Jacketing: State-of-the-Art Review

et al. 2019

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Sustainability necessitates the protection of infrastructure from any kind of deterioration over the life cycle of the asset. Deterioration in the capacity of reinforced concrete (RC) infrastructure (e.g., bridges, buildings, etc.) may result from localised damage sustained during extreme loading scenarios, such as earthquakes, hurricanes or tsunamis. In addition, factors such as the corrosion of rebars or ageing may also deteriorate or degrade the capacity of an RC column, thereby necessitating immediate strengthening to either extend or ensure its design life is not limited. The aim of this paper is to provide a state-of-the-art review of various strengthening and repair methods for RC columns proposed by different researchers in the last two decades. The scope of this review paper is limited to jacketing techniques for strengthening and/or repairing both normal- and high-strength RC columns. The paper also identifies potential research gaps and outlines the future direction of research into the strengthening and repair of RC columns.

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“…The aforementioned literature review reveals that the majority of the conducted research is focused on the application of nonconventional jackets in strengthening methods of original RC structural members [17][18][19]21,22,24,[26][27][28][30][31][32][33][34]36,[38][39][40][41][42][43][44][45][48][49][50]56]. Significantly fewer studies investigate such jackets for the repair of preloaded and slightly damaged RC specimens [20,23,25,29,35,37,46,47,[51][52][53][54][55].…”

Section: Research Significancementioning

confidence: 99%

“…These reasons have led researchers to switch to new jacketing techniques with alternative materials such as steel [17][18][19], advanced materials such as fiber reinforced polymer (FRP) [20][21][22][23][24][25], textile reinforced concrete or mortar [26][27][28][29] and shape memory alloys [30][31][32], cement-based materials such as ferrocement [33][34][35][36], steel fibrous concrete or mortar [37][38][39][40], high-performance fiber reinforced concrete [41][42][43][44][45][46][47][48], self-compacting concrete (SCC) [49][50][51][52][53][54], and thin slightly reinforced flowable mortar [55,56]. Many of these jacketing techniques have been proved successful substitutes to common RC jacketing.…”

Section: Introductionmentioning

confidence: 99%

Repair of Heavily Damaged RC Beams Failing in Shear Using U-Shaped Mortar Jackets

et al. 2019

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The effectiveness of slightly reinforced thin U-shaped cementitious mortar jacketing for the repair of damaged shear-critical reinforced concrete beams is experimentally investigated. The test project includes two parts. In the first one, five concrete beams over-reinforced against flexure and under-reinforced against shear with different ratio of closed stirrups were initially subjected to monotonic loading until failure. The initially tested beams have been designed to fail in shear after wide diagonal cracking and to exhibit various strength and deformation capacities along with different levels of damages. In the second experimental part, the heavily damaged beams were jacketed with mild steel small diameter U-shaped transverse stirrups and longitudinal reinforcing bars. The retrofitted specimens using the proposed jacketing technique were tested again following the same four-point-bending load scheme. Based on the overall performance of the beams, it is deduced that the shear strength and deformation capability of the jacketed beams were substantially increased compared to the corresponding capacities of the initial beams. Further, although all beams failed in a shear abrupt manner, the retrofitted ones exhibited reduced brittleness and higher deflections at failure up to six times with respect to the initially tested specimens. The level of the initial damage influences the efficiency of the jacketing. Additional test data derived from relative shear-damaged beam specimens and retrofitted with similar thin jackets is also presented herein in order to establish the effectiveness of this repair system and to clarify the parameters affecting its structural reliability. Comparisons indicated that jacketed beams can alter the failure mode from brittle shear to ductile flexural under certain circumstances.

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The Use of Bolted Side Plates for Shear Strengthening of RC Beams: A Review

Cited by 15 publications

References 34 publications

Seismic floor acceleration and energy absorption comparison on residential framed buildings with typical retrofitting and combined with nonlinear dampers

Seismic floor acceleration and energy absorption comparison on residential framed buildings with typical retrofitting and combined with nonlinear dampers

Strengthening and Repair of Reinforced Concrete Columns by Jacketing: State-of-the-Art Review

Repair of Heavily Damaged RC Beams Failing in Shear Using U-Shaped Mortar Jackets

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