Experimental and Finite Element Analysis of External ALC Panel Steel Frames with New Semi-Rigid Connector

Ding, Kaihua; Zong, Da; Liu, Yunling; He, Shulin; Shen, Wanyu

doi:10.3390/app112210990

Cited by 9 publications

(7 citation statements)

References 21 publications

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“…e FEM simplifies the complex boundary conditions in the experiment (slippage of the ground beam, small gaps between specimens, etc.) [36]. Moreover, the steel mesh slippage on the ALC panel was not considered.…”

Section: Verification Of Finite Element Resultsmentioning

confidence: 99%

“…All welding processes were replaced by the "Tie" constraint (between beams and columns, between connectors and beams, etc.). By considering the relationship between reinforcement and concrete, the embed command (built-in command) was used to embed the reinforcement directly into ALC panels [36]. Because ALC is only about 1/8-1/10 of the strength of ordinary concrete, it is easy to crush and make the friction effect smaller.…”

Section: Finite Element Analysis Models Abaqus Finite Elementmentioning

confidence: 99%

See 1 more Smart Citation

Hysteresis Behavior and Design of the New Autoclaved Lightweight Concrete (ALC) External Panel Connector with the Steel Frame

Ding

Zhang

et al. 2022

Advances in Materials Science and Engineering

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This paper proposes a new flexible connector for the autoclaved lightweight concrete (ALC) panel with the steel beam. It is a universal upper and lower crossing connector, with load-bearing and limitation holes; then, the seismic capacity of this connector is investigated in the simulations and full-scale tests. Firstly, the finite element simulations of the new connector and traditional connector (L-hooked bolt) were made by ABAQUS, which proved the reliability of the new connector by comparing them in low-cyclic loading. Secondly, in order to analyze the phenomenon and data of the two connectors which are in the same test conditions of simulation, the full-scale tests of the steel frame were conducted. The damage of the ALC panel at different connectors and at different test load displacements is described in detail. The contribution of the connectors to the steel frame and the ALC panel is investigated in depth during the elastic, elastoplastic, and plastic stages of the steel frames. The test result is similar to the simulation result roughly, in which the new connector has better seismic capability. In minor earthquakes, the ALC panel frame with the new connector has better synergistic capacity of panels, while in large earthquakes, it can provide certain stiffness to the structure. Compared with the L-hooked bolt, the maximum bearing capacity of the structure with the new connector increases by 5.2%, and the yield displacement delays by 27.5%, which results in the increase of ductility by 9.8%. In terms of energy consumption capacity, the equivalent damping factor of the new connector increases by 10.2% and 35.3% at the yield and ultimate state, respectively. The FEM simulation results can represent the actual test results well. To summarize, the new ALC panel connector in this paper has excellent seismic capacity and good synergistic, which can provide a reference for the development and application of new types of the ALC connector.

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Section: Verification Of Finite Element Resultsmentioning

confidence: 99%

Section: Finite Element Analysis Models Abaqus Finite Elementmentioning

confidence: 99%

Hysteresis Behavior and Design of the New Autoclaved Lightweight Concrete (ALC) External Panel Connector with the Steel Frame

Ding

Zhang

et al. 2022

Advances in Materials Science and Engineering

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“…Conversely, point-supported connection nodes are convenient to construct and exhibit simple mechanical characteristics. Despite being considered as non-load-bearing components in structural design, exterior wall panels significantly affect the seismic performance of the main structure [2][3][4][5][6][7][8]. If a dependable connection is not established between the main structure and the exterior wall panels, they could easily detach under earthquake activity, thus leading to additional casualties and damages due to falling wall panels.…”

Section: Introductionmentioning

confidence: 99%

Full Size Two-Layer Steel Frame–Exterior Wall Panel Shaking-Table Test

Yang,

Li,

Liu

et al. 2024

Buildings

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A cantilever block wall-panel attachment strip (CBW) flexible connection node was designed to connect precast concrete (PC) exterior wall panels to steel frames. To investigate the performance of the CBW flexible connection node and PC exterior wall panels during earthquakes, a partial two-storey steel frame was extracted from an actual engineering structure, and a full-scale steel frame–exterior wall panel shaking-table model was designed. Two sets of shaking-table tests were conducted under seismic intensity 7, 8, and 9 (Chinese Seismic Intensity Scale) earthquakes. The acceleration and displacement responses of the composite wall panel, open window panel, and integral wall panel along the in-plane and out-of-plane motions were analysed. The acceleration amplification factors of the PC exterior wall panels ranged from 0.753 to 1.400 (in-plane) and from 0.998 to 2.199 (out-of-plane). The CBW flexible connection node had a deformation capacity that could coordinate the deformation of the exterior wall panel and prevent severe damage. The surfaces of the PC exterior wall panels remained intact during a very strong seismic intensity 9 earthquake.

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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

Self Cite

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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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Experimental and Finite Element Analysis of External ALC Panel Steel Frames with New Semi-Rigid Connector

Cited by 9 publications

References 21 publications

Hysteresis Behavior and Design of the New Autoclaved Lightweight Concrete (ALC) External Panel Connector with the Steel Frame

Hysteresis Behavior and Design of the New Autoclaved Lightweight Concrete (ALC) External Panel Connector with the Steel Frame

Full Size Two-Layer Steel Frame–Exterior Wall Panel Shaking-Table Test

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

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