Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams

Zheng, Kaiqi; Ni, Siwen; Zhang, Yaohui; Gu, Junxuan; Gao, Mingming; Wei, Yang

doi:10.3390/buildings13112814

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…P-delta trans formation was used to convert the geometrical coordinates of the columns to take into account the p-delta effect caused by the lateral displacement of the structure. The concrete for the beams and columns was simulated using the Uniaxial Material Concrete 02 consti tutive model, which can consider the tension of concrete [36][37][38][39][40]; Longitudinal reinforced steel bars in beams and columns were modeled using a Steel 02 constitutive model, which was able to capture the hardening effect [41,42]. Prestressed strands were simulated by two Truss elements, which were parallel to the beam.…”

Section: Mechanism Of the Interaction Between Axial And Bending Defor...mentioning

confidence: 99%

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Huang,

Qian,

Meng

et al. 2023

Buildings

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To enhance the structural stiffness and energy-dissipating capacity after the decompression of beam-to-column connections for self-centering prestressed concrete (SCPC) frames, this study presents the seismic performance of a new type of SCPC frame with variable friction dampers (VFDs). The structure is characterized by a third stiffness and a variable energy-dissipating capacity. A 5-story and an 8-story VFD-SCPC frame were selected as the analytical cases, and their numerical models were built based on OpenSees 3.3.0 finite-element software. Sixteen ground-motion records were selected as excitations for the analyses, and the influence of the second stiffness and the third stiffness for the VFD-SCPC connections, as well as the second activation for VFD, on the seismic performance of the structures, was studied. The results showed that increasing the stiffness (number) of prestressed strands and their distance to the center of the beam section can obviously increase the second stiffness of the structures, thus decreasing their displacement, while the distribution mode of inter-story drift along the building’s height cannot be changed. Increasing the third stiffness of the connections (the angle of slope sliding parts and the stiffness for the combination of disc springs) can effectively reduce the deformation of the structures under MCE (maximum-considered earthquakes) seismic levels and improve the energy-dissipation capacity of structures significantly. The premature secondary activation of VFD can enhance the loading capacity and energy-dissipation capacity of structures under both DBE (design-basis earthquakes) and MCE seismic levels, and reduce the inter-story drift of structures effectively.

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Section: Mechanism Of the Interaction Between Axial And Bending Defor...mentioning

confidence: 99%

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Huang,

Qian,

Meng

et al. 2023

Buildings

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Advanced Structural Technologies Implementation in Designing and Constructing RC Elements with C-FRP Bars, Protected Through SHM Assessment

Angeli,

Naoum,

Papadopoulos

et al. 2024

Fibers

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The need to strengthen the existing reinforced concrete (RC) elements is becoming increasingly crucial for modern cities as they strive to develop resilient and sustainable structures and infrastructures. In recent years, various solutions have been proposed to limit the undesirable effects of corrosion in RC elements. While C-FRP has shown promise in corrosion-prone environments, its use in structural applications is limited by cost, bonding, and anchorage challenges with concrete. To address these, the present research investigates the structural performance of RC beams reinforced with C-FRP bars under static loading using Structural Health Monitoring (SHM) with an Electro-Mechanical Impedance (EMI) system employing Lead Zirconate Titanate (PZT) piezoelectric transducers which are applied to detect damage development and enhance the protection of RC elements and overall, RC structures. This study underscores the potential of C-FRP bars for durable tensile reinforcement in RC structures, particularly in hybrid designs that leverage steel for compression strength. The study focuses on critical factors such as stiffness, maximum load capacity, deflection at each loading stage, and the development of crack widths, all analyzed through voltage responses recorded by the PZT sensors. Particular emphasis is placed on the bond conditions and anchorage lengths of the tensile C-FRP bars, exploring how local confinement conditions along the anchorage length influence the overall behavior of the beams.

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Post-Cracking Shear Stiffness Model of Reinforced Concrete Beams

Cited by 2 publications

References 24 publications

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Parametric Investigation of Self-Centering Prestressed Concrete Frame Structures with Variable Friction Dampers

Advanced Structural Technologies Implementation in Designing and Constructing RC Elements with C-FRP Bars, Protected Through SHM Assessment

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