Seismic Strength and Stiffness for Recycled Aggregate Concrete‐Filled Steel Tube Frame

Zhang, Xianggang; Yang, Jinbao; Zhang, Yaozong; Gao, Xiaona

doi:10.1155/2019/4680672

Cited by 4 publications

(4 citation statements)

References 43 publications

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“…In order to reduce computational efforts, the modulus of elasticity is set to 10 12 MPa, and Poisson's ratio is set to 0.0001 [19]. The performance of recycled concrete was simulated using the concrete damage plasticity model (CDPM) provided in ABAQUS [20], and the compressive principal relationships are expressed as follows [21] :…”

Section: Steel Tube/boltmentioning

confidence: 99%

Experimental Investigation of H-beam to Recycled Aggregate Concrete Column Edge Connections under Cyclic Loading

yang,

Liu

2024

Preprint

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This paper aims to investigate the cyclic performance of the connections between the recycled aggregate concrete (RAC) column and steel H-beam. In this connection system, the steel beam is welded to the end plate to form an integral unit, which is bolted to the column. The differences in seismic performance between the novel casing-type one-side bolted end-plate connection and the conventional all-welded joint with external diaphragm and top-seat angle connection were investigated. Three types of joints with different connection details were designed and fabricated at a reduced scale of 1:2, following the principle of strong columns and weak beams. The low cyclic lateral loading test was performed by beam-end loading to observe the loading process and failure morphology of the joint model. The load-beam end displacement hysteresis curve and the skeleton curve were obtained to analyze the joint load eigenvalues, ductility, energy dissipation, and stiffness degradation. The experimental results showed that all three specimens exhibited beam-end failure and demonstrated good ductility. Furthermore, a finite element model was established. The effects of axial compression ratio, steel tube width-to-thickness ratio, outer tube, and end-plate thickness on the bearing performance of the outer tube one-side bolted end-plate joint under lateral loading were analyzed. It was found that the bearing capacity and stiffness of the specimens increased with increasing steel tube width-to-thickness ratio, outer tube thickness, and end-plate thickness. Changes in the axial compression ratio had little effect on the bearing capacity and stiffness of the specimens.

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Section: Steel Tube/boltmentioning

confidence: 99%

Experimental Investigation of H-beam to Recycled Aggregate Concrete Column Edge Connections under Cyclic Loading

yang,

Liu

2024

Preprint

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“…They found that the columns filled with waste concrete blocks and fresh concrete met the seismic design requirements [13]. Zhang et al studied the seismic strength and stiffness of the RACFST frame under low-cycle repeated loading [14].…”

Section: State Of the Artmentioning

confidence: 99%

Seismic Behavior Analysis of Recycled Aggregate Concrete-filled Steel Tube Column

Zhang¹,

Wang²,

Gao³

2019

JESTR

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To investigate the seismic behavior of recycled aggregate concrete-filled circular steel tube (C-RACFST), twenty-three full-scale specimens were tested by changing the design parameters. Seismic behavior indices, such as hysteresis curve, skeleton curve, ductility coefficient, and energy dissipation capacity were analyzed and the influence rules of design parameters on seismic behavior index were revealed. Results show that it is feasible to apply C-RACFST to the actual load-bearing structure based on the seismic behavior index requirements. With the increase of the steel ratio, the hysteresis curve become plumper, and the peak-bearing capacity and displacement ductility coefficient increase. With the increase of the axial compression ratio, the peak-bearing capacity and ductility decrease and the energy dissipation coefficient of each specimen increases gradually under the same cycle displacement. The conclusions obtained in the study are of reference value to direct the similar engineering.

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“…Li et al 14 studied the impact performances of RACFST after exposure to high temperatures and found that the fire‐damaged RACFST can maintain its integrity during impact load, but the bearing strength, impact secant modulus and residual impact strength of RACFST obviously decreased after 500° C and 700° C. Generally speaking, the reported research studies on RACFST show that this kind of composite structures has similar mechanical properties to those of CFST structures and has a good prospect in engineering application. However, most of the studies on RACFST structures are from the component level, 12–16 and the studies from the structural level are relatively rare 17,18 . In addition, deep‐bending beams are often formed in practical frame structures, such as transfer beams in high‐rise buildings, short beams formed when columns are arranged on both sides of the longitudinal inner corridor, etc.…”

Section: Introductionmentioning

confidence: 99%

Seismic experiment and performance index studies on recycled aggregate concrete filled steel tube frames infilled with recycled hollow block filler walls

Meng

Zhang

et al. 2020

Structural Concrete

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To study the seismic behavior of recycled aggregate concrete filled steel tube (RACFST) frames infilled with recycled hollow block filler walls (RHBFW), four frame specimens were designed subjected to low cycle loading experiments. Through the test, the failure process and pattern of specimens were observed and the seismic performance indexes were obtained. The results show that the hysteretic curves of RACFST frames infilled with RHBFW are full; the equivalent viscous damping coefficients he of specimens when destroyed both exceed 0.2, and the interlayer displacement angle is between 1/34 and 1/33 when destroyed, meaning the frame structures having good energy dissipation and good collapse resistance abilities. The RAC beam section height has little effect on the ductility and stiffness degradation of specimens; however, the bearing capacities of specimens increase gradually with the increase of beam section height. The existence of RHBFW can be the first seismic defense line of RACFST frames, and they can improve the ductility of specimens, as well as the bearing capacities and initial elastic stiffness. Before RHBFW failed, the specimens with filler wall have better energy dissipation abilities than those without filler wall. After RHBFW failed, the specimens without filler wall have better energy dissipation abilities than those with filler wall.

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Seismic Strength and Stiffness for Recycled Aggregate Concrete‐Filled Steel Tube Frame

Cited by 4 publications

References 43 publications

Experimental Investigation of H-beam to Recycled Aggregate Concrete Column Edge Connections under Cyclic Loading

Experimental Investigation of H-beam to Recycled Aggregate Concrete Column Edge Connections under Cyclic Loading

Seismic Behavior Analysis of Recycled Aggregate Concrete-filled Steel Tube Column

Seismic experiment and performance index studies on recycled aggregate concrete filled steel tube frames infilled with recycled hollow block filler walls

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