Development and Application of Spring Hinge Models to Simulate Reinforced Ductile Concrete Structural Components under Cyclic Loading

Tariq, Hasan; Jampole, Ezra; Bandelt, Matthew J.

doi:10.1061/(asce)st.1943-541x.0002891

Cited by 10 publications

(5 citation statements)

References 42 publications

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“…Because the design ensured a beam-sway mechanism under the design level input motions, a caution for numerical modeling technique [33] is to consider material/section overstrength for beam/column members, as the beam provided enough hardening to cause significant damage to the joint panel at large deformation demand. The development of severe damage in the joint core confirms hardening in the joint force-deformation behavior, which is critical for joint nonlinear modeling [34].…”

Section: Discussionmentioning

confidence: 99%

Shaking Table Testing of a Low-Rise Reinforced Concrete Intermediate Moment Resisting Frame

et al. 2022

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Multi-level shaking table tests were performed on a 1:3 reduced scale two-story reinforced concrete (RC) intermediate moment resisting frame (IMRF) conforming to the requirements given in the ACI-318-19. The exterior joints lacked shear reinforcement to assess the viability of the ACI model recommended for determining the design shear strength of the beam–column joint panel. One of the horizontal components of the 1994 Northridge earthquake accelerogram (090 CDMG Station 24278, Source: PEER strong motion database) was input to the frame for multi-level shaking table testing. Plastic hinges developed in beams under base input motion with a maximum acceleration equal to 0.40 g. The exterior joints incurred extensive damage under base input motion with a maximum acceleration equal to 0.70 g. The frame achieved displacement ductility and overstrength factors (determined as the ratio of the maximum resistance of the frame to the design base share force) equal to 2.40 and 2.50, respectively. This gives a response modification factor equal to 6. The satisfactory performance of the frame is attributed to the high efficiency of the beam–column joint, which was confined by spandrel beams on two faces and the high strength of the concrete. The inherent minimal confinement is sufficient to ensure satisfactory seismic behavior. The analysis confirmed overstrength equal to 1.58 for joint shear strength in comparison to the design strength determined using the ACI model. The data might serve as a reference for calibrating and validating numerical modeling techniques for performance evaluation, which are crucial in the context of performance-based engineering.

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Section: Discussionmentioning

confidence: 99%

Shaking Table Testing of a Low-Rise Reinforced Concrete Intermediate Moment Resisting Frame

et al. 2022

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“…The focus of this task is to numerically investigate the structural performance of the prefabricated barrier systems using the recessed connection subjected to transverse static loading at their free end (Figure 2 c ). The numerical investigation of nonlinear effects in concrete materials has been the subject of many recent studies ( 29 ). Detailed non-linear finite element analyses were performed and the numerical models were calibrated against the results of the experimental component testing.…”

Section: Finite Element Analysismentioning

confidence: 99%

Experimental and Numerical Investigation of Prefabricated Concrete Barrier Systems Using Ultra-High-Performance Concrete

Khodayari

Mantawy

Azizinamini

2023

Transportation Research Record: Journal of the Transportation R

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The functionality and crashworthiness of concrete barriers in bridge systems can be affected by the deterioration of the connection between bridge decks and concrete barriers. A set of details for barrier-to-deck connections for accelerated bridge construction (ABC) applications are proposed. Component-level testing was carried out on a conventional cast-in-place (CIP) detail and two versions of connections using ultra-high-performance concrete (UHPC). The use of UHPC allows for shorter development length and lap splice length for dowel bars and the material characteristics provide strength and durability to the connection. Two connection details were proposed: (1) UHPC connection within the barrier segment (U-shape connection) and (2) UHPC connection in a recess inside the bridge deck (recessed connection). Besides simplified details, the construction sequence of the proposed recessed connection is suitable for ABC applications. It is observed that the proposed U-shape connection detail is emulative of the equivalent CIP concrete barrier system. However, the recessed connection system can undergo significantly larger deflections at ultimate load compared with the CIP barrier system and exhibits a preferred mode of failure while the deck does not undergo significant damage. The results of the component testing were used to calibrate non-linear finite element models. Using validated models, numerical analyses were performed to investigate the structural performance of conventional 15 ft long barrier modules connected to the deck overhang using the recessed connection. The model was subjected to the end-loading configuration and it was found that the proposed barrier system meets the strength requirement for the corresponding test level.

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“…In order to investigate how damage or deterioration of RC deficient B-C joints affects the seismic response of existing RC frames with such joints, Ahmad N. et al (2022) [21] conducted nonlinear modelling of the joints. Tariq H. et al (2022) [22] constructed and utilized spring-hinge models to archetypal frame structures in order to comprehend the influence of ductile concrete materials at the potential plastic hinge area of beams and its effect at structural level seismic performance. Keeping in view the flexural over strength in RC beam and slab systems as suggested/highlighted/investigated by Masoudi Two FFHR RC beam-column junctions with transverse beams and slab were evaluated by M, et al (2020) [23], Marchisella A, et al (2021) [24], and resulted in an increase in the joint as well as beam flexural strength.…”

Section: Introductionmentioning

confidence: 99%

In-Plane Quasi-Static Cyclic Testing of Rc Frames Retrofitted With Rigid/Dissipating Steel Haunches

Ilyas,

Jan,

Khedher

et al. 2024

Preprint

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This research assessed the reliability of haunch retrofitting technique for seismic upgrade of critically damaged frames. Two 1:3 reduced scale two-story RC frames were taken under considered, which were tested previously till the near collapse state. The haunches are employed to strengthen the joint shear strength of the badly damaged joints, which are indicative of old, non-seismic, or defective joints. Damaged concrete was replaced with new high-strength concrete, and haunch-retrofitting technique was adopted to strengthen beam-column connections, in order to avoid shear hinging at joints under lateral loads. The retrofitted frames were tested through quasi-static cyclic loads in a displacement-control condition for multiple-levels of roof drifts. In order to assess the following seismic response factors: stiffness, strength, ductility, and response modification factors—lateral force-displacement capacity curves were created and examined. Hysteretic responses of tested models were analyzed to quantify hysteretic damping. The seismic performance assessment of the retrofitted frames was conducted utilizing a code-based static force approach in multiple seismic zones. The rigid haunches contributed to the over strength factor while the dissipating haunch has major contribution in energy dissipation of the retrofitted frames.

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Development and Application of Spring Hinge Models to Simulate Reinforced Ductile Concrete Structural Components under Cyclic Loading

Cited by 10 publications

References 42 publications

Shaking Table Testing of a Low-Rise Reinforced Concrete Intermediate Moment Resisting Frame

Shaking Table Testing of a Low-Rise Reinforced Concrete Intermediate Moment Resisting Frame

Experimental and Numerical Investigation of Prefabricated Concrete Barrier Systems Using Ultra-High-Performance Concrete

In-Plane Quasi-Static Cyclic Testing of Rc Frames Retrofitted With Rigid/Dissipating Steel Haunches

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