Seismic performance of R.C buildings with Beam-Column joints upgraded using FRP laminates

Alhaddad, Mohammd S.; Binyahya, Abobaker S.; Alrubaidi, Mohammed; Abadel, Aref A.

doi:10.1016/j.jksues.2020.05.008

Cited by 8 publications

(6 citation statements)

References 11 publications

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“…This conforms to an approach for capacity design. Here in the considered case, the initial yielding of the specimen corresponds to the beam yielding matching to the v d jh = 7.53 MPa joint shear stress calculated with Equation (8). Due to the shear strength (3.97 Where p c = v c jh = 0.5(f c ) and is equivalent to v c jh = 19.5 MPa, it is significantly greater than v jh (= 14.81 MPa).…”

mentioning

confidence: 90%

“…Consequently, numerous strengthening strategies were reported to enhance the capability of contemporary beam-column joints (BCJs) during seismic events [2]. Among the materials utilized by the researchers for this purpose, there are steel fibers [3], RC jackets [4], RC chamfers [5], fiber-reinforced composites ( [6], hybrid fiber reinforced concrete with ultra-high performance [7], FRP laminates [8], CFRP ropes [9], geosynthetic materials [10], and sheets and strips of fiber-reinforced polymers (FRP) [11][12][13]. Compared to other techniques, FRP systems are more popular as a strengthening solution because of their light weight [14], durability, ductility, significant resistance to corrosion, and easy handling [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Development of an Analytical Model for the FRP Retrofitted Deficient Interior Reinforced Concrete Beam-Column Joints

et al. 2022

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Beam-column joints (BCJs) constructed until the 1970s carry a low shear capability due to the absence of shear reinforcement. Fiber-reinforced polymers (FRP) are more reliable than other materials to strengthen a weak BCJ. To date, plenty of analytical models have been developed to analyze the actual contribution of the FRP to the shear strength of RC BCJs. However, the models developed are either too complex in computational efforts or based on empirical coefficients that result in compromised results. The models that formulate the contribution of FRP to the shear strength of the FRP-strengthened deficient interior BCJ are very limited, and such models are too complex. An adequate BCJs’ FRP strain equation must still be developed to address these issues. Therefore, the FRP effective strain equation and contribution of FRP to RC BCJs are derived in this research work using an updated database of the appropriate BCJs. The initial analytical model of Bousselham, which Del Vecchio later improved, is further extended to FRP-strengthened deficient interior BCJs. For this purpose, an updated database of the 32 tests around the world of FRP-strengthened interior BCJs deficient in seismic reinforcement is prepared. Firstly, the experimental effective FRP strain is derived using the experimental database. Then, a power-type equation is derived for the effective FRP strain by considering the crucial parameters of the FRP-strengthened interior BCJs. Finally, the experimental shear strengths and those determined with the proposed equation of the FRP-strengthened joints are compared. The average ratio between the experimental and analytical (proposed model) joint shear strengths of the considered specimens ensured the accuracy of the suggested model. The suggested approach makes computing the FRP enhancements required to avoid shear failure in interior joints easy and reliable for researchers and field engineers interested in seismically reinforcing existing structures.

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confidence: 90%

Section: Introductionmentioning

confidence: 99%

Development of an Analytical Model for the FRP Retrofitted Deficient Interior Reinforced Concrete Beam-Column Joints

et al. 2022

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“…FRP sheets can improve the flexural capacity of the connections and decrease joint rotation [56]. Many studies have been conducted to evaluate the effectiveness of FRP composites as a beam-column joint strengthening technique [57,58]. Ghobarah et al [59] showed that using GFRP jacketing in column-beam connections can enhance energy dissipation, shear resistance, and ductility and change shear brittle failure to flexural failure in joints.…”

Section: Columnsmentioning

confidence: 99%

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Abbaszadeh

Chaallal

2022

J. Compos. Sci.

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The primary seismic force-resisting system (SFRS) in middle- to high-rise reinforced concrete (RC) building structures often includes coupled shear walls (CSWs) and single shear walls (SSWs). These walls are designed to transfer lateral forces to the foundation and dissipate energy through the development of plastic hinges. The latter lead to residual displacement in these structural components. On the other hand, self-centering systems enable the structures to return to their initial position after severe loading or at least reduce residual displacement. The objectives of this study were, therefore, as follows: (i) to review the state of the art on shear wall self-centering techniques and retrofitting methods based on externally bonded fiber-reinforced polymer (EB-FRP); (ii) to evaluate research needs to improve the self-centering ability of shear walls using EB-FRP.

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“…Reinforced concrete element has been developed into high-strength material and combined with normal-strength material and fiber steel. Alhaddad et al [3] reported that using carbon fiber on normal-strength reinforced concrete numerically improves the seismic performance of the beam-column joint of the building. Meanwhile, using high-strength steel on normal-strength concrete in a special moment frame system might lead to a drift ratio higher than 4% in cyclic loading during an earthquake [4].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of earthquake design variables on middle-low rise building with varied concrete-steel strength

Kimsan,

Papalangi,

Perceka

2023

E3S Web Conf.

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Technological developments in material strength and earthquake-resistant reinforced concrete design still need to be implemented in areas with economic growth at the national average or below. The areas have a highly typical building design with a low to moderate category and will inevitably apply code requirements in line with the technology acceleration. Thus, it is necessary to provide a transition scheme of structure with normal to high-strength materials regarding their effectivity in construction, especially for middle-low rise buildings. This research examines earthquake design variables, i.e., response modification factor (R) and base shear design of some typical stories. We analyzed the structure with mixed concrete and steel reinforcement grades to 4-,6-,8-, and 10-story done in Midas Gen with pushover analysis. The data from the result analysis was then scrutinized to capture the structural performance. The analysis of the transition scheme of structure from normal to high-strength materials shows an increase in the strength of the structure to withstand shear forces. The structure ductility and drift differences for each approach scheme differ from the differences in the R-value representing structure ductility. Normal concrete and high-strength steel deliver better performance than other combinations. Normal Concrete-High Strength Steel's transition scheme demonstrates an adequate structure performance.

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Seismic performance of R.C buildings with Beam-Column joints upgraded using FRP laminates

Cited by 8 publications

References 11 publications

Development of an Analytical Model for the FRP Retrofitted Deficient Interior Reinforced Concrete Beam-Column Joints

Development of an Analytical Model for the FRP Retrofitted Deficient Interior Reinforced Concrete Beam-Column Joints

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Evaluation of earthquake design variables on middle-low rise building with varied concrete-steel strength

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