Seismic Performance of Interior Reinforced Concrete Beam–Column Joint with Corroded Reinforcement

Zhang, Xinchen; Li, Bing

doi:10.1061/(asce)st.1943-541x.0003255

Cited by 14 publications

(3 citation statements)

References 25 publications

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“…Ding Kewei [9,10] et al conducted full-scale seismic tests on the proposed new beamcolumn joints and compared the results with existing cast-in-place concrete joints, and found that the new type of joints with bolted connections was equivalent to cast-in-place in seismic performance and energy dissipation. On this basis, it was proposed that new materials (such as cell metal materials) be filled in the beam ends and columns [11][12][13] in the core zone of the joint, and their theoretical research and numerical simulation be carried out. The results showed that filling with a certain amount of new materials can improve the ductility and toughness of the whole structure and enhance its seismic energy dissipation performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies on the Seismic Performance of New Assembled Concrete Frame Beam–Column Joints

Liu

2023

Buildings

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A new type of assembled concrete beam–column joint based on a bolted connection was proposed, aiming to complete the post-earthquake node repair work by replacing precast beams and bolts. To study the seismic performance of the new beam–column joints, two full-scale components of the new joints were fabricated and subjected to low cyclic loading. The whole process from crack generation to component failure was investigated in detail, and seismic performance indicators such as the hysteresis curve, skeleton curve and stiffness degradation curve were compared and analyzed. Based on the experimental results, ABAQUS finite element software was applied to numerically simulate cast-in-place joints and test joints. Based on the failure mechanism of the new assembled beam–column semi-rigid joints, a stress analysis of semi-rigid joints was carried out. The research results show that the two new joints have good seismic performance and energy dissipation performance. Bolts and precast beams are the main stress components, and the repair of new joints can be completed by replacing bolts, which meets the seismic design concepts of “strong columns and weak beams” and “strong joints and weak components”. The larger the diameter of the bolts, the higher the load capacity and the lower the stiffness degradation rate. The finite element simulation results are high-accuracy and can well reflect the seismic performance of the components. It is found that cast-in-place joints are better in energy dissipation capacity than test joints, but the ultimate bearing capacity of test joints is better than that of cast-in-place joints. Based on the experimental stress characteristics of the nodal core zone, a mechanical analysis model of the nodal core zone of the new assembled concrete beam–column joints is proposed, and shear force calculation equations for the core zone of the new assembled concrete beam–column rigid joints and semi-rigid joints are derived.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies on the Seismic Performance of New Assembled Concrete Frame Beam–Column Joints

Liu

2023

Buildings

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“…In the current circumstances, precast concrete elements have provided a solution to the conventional challenges associated with steel structures. Many scholars have concentrated on the seismic performance of various precast concrete elements and have demonstrated their various mechanical qualities [5][6][7][8]. The cross-application of different panels has developed a new type of enclosure system [9].…”

Section: Introductionmentioning

confidence: 99%

Cyclic Behavior of Autoclaved Aerated Concrete External Panel with New Connector

Cui

Ding

et al. 2022

Materials

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In this paper, a new slip-type crossing connector is proposed for autoclaved aerated concrete (ALC) panels with steel frames, and the proposed connector is also studied deeply in terms of seismic performance. The research included pseudo-static tests and finite element simulations. First, the seismic performance of slip-type crossing connectors and standard L-hooked bolts was studied comparatively, including the stability, bearing capacity, stiffness, energy dissipation, and hysteresis performance. ABAQUS 2020 software was used to establish finite element models, and the results of the experiments were verified with simulations on the basis. According to the simulations, a parameter analysis of connector optimization was carried out. The effects of connector thickness and connector plate length on the seismic performance were further investigated. From the experimental and simulation results, the slip-type crossing connector has excellent performance and good assembly efficiency, it can improve the deficiencies of the existing connectors. The comparison demonstrated that the slip-type crossing connector has a complete hysteresis curve, a high energy dissipation capacity, and a 9.7% increase in bearing capacity. The appropriate reduction in connector thickness and plate length can ensure superior seismic performance while saving resources. The finite analysis method can guide the design and implementation of new external ALC panel connectors.

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“…3 Material properties of joint specimens tested in literatures [Z6], [D1] Table 7. 4 Parameters for Pinching4 model Figure 2.7 Relationship between corrosion level and ratio of yield point, tensile strength, elongation and elastic modulus [L2] Figure 2.8 Load-deformation curves of corroded rebars with various corrosion levels [Z3] Figure 2.9 Stress-strain curve of cover concrete under different corrosion levels [O7] Figure 2.10 Stress-strain curve of confined concrete under different corrosion levels [O7] Figure 2.11 Experimental stress-strain curve of confined concrete with different corrosion levels and stirrups volumetric ratio (left: 2.51%, right: 0.97%) [V7] List of Figures…”

Section: Authorship Attribution Statementmentioning

confidence: 99%

Seismic behaviour and damage characteristics of corroded reinforced concrete beam-column joint

Zhang¹

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Seismic Performance of Interior Reinforced Concrete Beam–Column Joint with Corroded Reinforcement

Cited by 14 publications

References 25 publications

Experimental and Numerical Studies on the Seismic Performance of New Assembled Concrete Frame Beam–Column Joints

Experimental and Numerical Studies on the Seismic Performance of New Assembled Concrete Frame Beam–Column Joints

Cyclic Behavior of Autoclaved Aerated Concrete External Panel with New Connector

Seismic behaviour and damage characteristics of corroded reinforced concrete beam-column joint

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