Effects of loading regimes on the structural behavior of RC beam-column sub-assemblages against disproportionate collapse

Qian, Kai; Geng, Songyuan; Liang, Shi-Lin; Fu, Feng; Yu, Jun

doi:10.1016/j.engstruct.2021.113470

Cited by 42 publications

(6 citation statements)

References 31 publications

(1 reference statement)

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“…6. This setup was commonly used for pushdown tests of disproportionate collapse resilience of structures [23][24][25][26][27]. As mentioned above, the specimens were was pin supported with a roller installed horizontally at the top of the side column and overhanging beam end to represent the horizontal restraints from adjacent members.…”

Section: Test Setup With Instrumentation Layoutmentioning

confidence: 99%

Resilience of prefabricated concrete frames using hybrid steel-concrete composite connections

Deng

Dong

et al. 2022

Journal of Building Engineering

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Section: Test Setup With Instrumentation Layoutmentioning

confidence: 99%

Resilience of prefabricated concrete frames using hybrid steel-concrete composite connections

Deng

Dong

et al. 2022

Journal of Building Engineering

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“…Numerous experimental and numerical studies have been conducted over the last two decades to understand the progressive collapse behavior of reinforced concrete (RC) building structures at different levels, including beam-column sub-assemblages (Qian et al, 2018, 2022; Valipour et al, 2016; Yang et al, 2021; Yu and Tan, 2013a, 2013b), beam-slab sub-assemblages (Lu et al, 2017; Qian et al, 2016; Ren et al, 2016; Yu et al, 2018; Yu, Luo, et al, 2020; Yu, Tang, et al, 2020), planar frames (Li et al, 2021; Lim et al, 2017; Yu and Tan, 2017; Zhou et al, 2019) and overall structures (Brunesi et al, 2015; Feng et al, 2022; Petrone et al, 2020; Praxedes and Yuan, 2021; Shan et al, 2019) etc. In previous researches (Baghi et al, 2018; Brodsky and Yankelevsky, 2017; Li et al, 2016; Qian and Li, 2017; Shan et al, 2016), masonry infill walls have been proven to have a substantial impact on the resistance of RC frames to progressive collapse.…”

Section: Introductionmentioning

confidence: 99%

Effect of tie column on the progressive collapse performance of infilled reinforced concrete frames

Yu,

Ahmad,

Gan

et al. 2023

Advances in Structural Engineering

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In practice, reinforced concrete (RC) infilled frames having longer span are provided with tie columns to improve structural integrity but previous work ignored tie columns in studying the effect of masonry infills on progressive collapse resistance of RC frames. Therefore, aim of this study is to explore the effect of tie columns on the progressive collapse resistance of RC infilled frames under column removal scenarios. The high-fidelity-based finite element model of RC infilled frames were first developed and validated with published experimental results. The validated model was then further evolved to an RC infilled frame having tie columns to evaluate the influence of tie columns on the load transfer mechanism and the resistance of the RC infilled frame against progressive collapse. Thereafter, the numerical model was further utilized to study the effects of the pertinent parameters, including the number of stories, the span length of the frame and the longitudinal reinforcement ratio of the tie columns. Finally, equivalent strut model was suggested for macro-modeling of RC infilled frames having tie columns in engineering practice. The results showed that incorporating tie columns makes truss mechanism more fully mobilized in masonry infill walls and the inclined angles of primary struts in each sub-panel of the infill wall are increased, improving the vertical components of diagonal compression in resisting the gravity load. Consequently, introducing tie columns at middle span of infill wall panels helped to increase the initial stiffness (about 19%), peak resistance (about 26%) and post-peak resistance of RC infilled frame under a middle column removal scenario. Such beneficial effect of tie columns becomes more significant for infilled frames with larger spans, and the longitudinal reinforcement ratio of tie columns should be ≤ 0.24%.

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“…UHPC with addition of steel fibers has been widely used in certain projects required higher strength, 6 better seismic performance, and desirable blast resistance. 7,8 Therefore, it has attracted considerable attention from engineering and academic communities. In addition, Due to its high compressive strength, it is more suitable for prestressed concrete, which can further reduce the weight of the structure components and costs.…”

Section: Introductionmentioning

confidence: 99%

“…Structural members using UHPC exhibit better durability, energy dissipation, and fatigue performance compared to conventional concrete members. UHPC with addition of steel fibers has been widely used in certain projects required higher strength, 6 better seismic performance, and desirable blast resistance 7,8 . Therefore, it has attracted considerable attention from engineering and academic communities.…”

Section: Introductionmentioning

confidence: 99%

Shear behavior of glass FRP bars‐reinforced ultra‐high performance concrete I‐shaped beams

Cao

Qian

et al. 2022

Structural Concrete

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In this paper, the shear behavior of glass fiber reinforced polymer (GFRP) bars reinforced ultra-high-performance concrete (UHPC) beams was investigated through experimental tests. Eight GFRP bars reinforced UHPC I-beams were tested until shear failure with various stirrup ratio, reinforcement ratio, and shear span to depth ratio. The shear capacity, load-deflection relationship, cracking pattern, and failure mode were investigated in detail. The results show that the shear span to depth ratio has the greatest influence on the shear capacity of the beam among the three parameters, followed by the stirrup ratio and reinforcement ratio. The stirrup configuration can significantly improve the shear capacity and deformation resistance of the beam and can effectively reduce the stress concentration caused by the uneven distribution of steel fibers, which affects the failure mode of the beam. Increasing the stirrup ratio and reinforcement rate can improve the stiffness of the beam after cracking, and the larger the shear span to depth ratio is, the more significant the improvement effect is. Moreover, the stirrup enables the full development of the tensile capacity of GFRP bars. The existing equations of shear strength from five design codes and seven literatures are compared to the experimental results of 54 UHPC beams. It showed that the formula from the codes AFGC-2013 and JSCE-2006 codes is more accurate. The equations by Kwak, Jin, and Thiemicke's provide the best predictions.glass fiber reinforced polymer rebar, shear behavior, shear span to depth ratio, stirrup ratio, ultra-high-performance concrete Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.

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Effects of loading regimes on the structural behavior of RC beam-column sub-assemblages against disproportionate collapse

Cited by 42 publications

References 31 publications

Resilience of prefabricated concrete frames using hybrid steel-concrete composite connections

Resilience of prefabricated concrete frames using hybrid steel-concrete composite connections

Effect of tie column on the progressive collapse performance of infilled reinforced concrete frames

Shear behavior of glass FRP bars‐reinforced ultra‐high performance concrete I‐shaped beams

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