Progressive Collapse Resistance Demand of RC Frames under Catenary Mechanism

Li, Yang; Lu, Xinzheng; Guan, Hong; Ye, Lieping

doi:10.14359/51687029

Cited by 45 publications

(6 citation statements)

References 16 publications

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“…Defining k = c s/2, the movement equation for the falling tile in the y-direction can be given as (3) After solving Equation 3, the trace of the tile in the y-direction can be calculated with Equation 4ln cosh /…”

Section: Physical Model Of Falling Tilesmentioning

confidence: 99%

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Virtual Scene Construction for Seismic Damage of Building Ceilings and Furniture

Zhang

Wei

et al. 2019

Applied Sciences

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A valid seismic damage scene for indoor nonstructural components is critical for virtual earthquake safety drills which can teach occupants how to survive in earthquakes. A virtual scene construction method for the seismic damage of suspended ceilings and moveable furniture is proposed based on FEMA P-58 and a physics engine. First, a modeling framework is designed based on building information modeling (BIM) to create consistent structural and scene models for the subsequent structural time-history analysis (THA) and scene construction. Subsequently, FEMA P-58 is employed to determine the damage states of nonstructural components based on the results of the THA. Finally, the physical models on the movements of the damaged components are designed using a physics engine and are also validated through the experiments such as an existing shaking table test. Considering a six-story building as a case study, a virtual earthquake scene of the indoor nonstructural components is constructed and applied in an earthquake safety drill. The outcome of this study provides well-founded scenes of the seismic damage to indoor nonstructural components for performing virtual earthquake safety drills.

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Section: Physical Model Of Falling Tilesmentioning

confidence: 99%

“…With the development of earthquake engineering, the earthquake-induced collapse of building structures has been effectively controlled in recent years [1][2][3][4][5][6]. However, seismic damage of indoor nonstructural components remains a serious issue, leading to possible occupant casualties.…”

Section: Introductionmentioning

confidence: 99%

Virtual Scene Construction for Seismic Damage of Building Ceilings and Furniture

Zhang

Wei

et al. 2019

Applied Sciences

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“…As defined in this work, the beam or column sectional failure was reached upon the fracturing of all the steel fibers or the crushing of all the concrete fibers within that section, respectively. The RC beams exhibited bending and tensile capacities under small and large deformations, respectively, which contributed to the collapse resistance of the building [42][43][44]. Similarly, bending and compressive mechanisms also existed in the columns under small and large deformations, respectively.…”

Section: Component Failure Criteriamentioning

confidence: 93%

A Case Study on a Fire-Induced Collapse Accident of a Reinforced Concrete Frame-Supported Masonry Structure

Guan

et al. 2015

Fire Technol

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In 2003, an 8-storey reinforced concrete (RC) frame-supported masonry structure, located in Hengyang City, China, underwent a severe fire-induced collapse accident. Information on the structure and the fire scenario is presented. It includes the design data, the site observation record of the fire incident, and the laboratory material test results. Preliminary investigation reveals that about 45.9% of the bottom storey of the RC frame experienced temperatures in excess of 800°C, and its central area reached 1300°C. Such a severe fire load, of fairly high temperature and large area, is thought to be the primary cause of the progressive collapse of the entire building structure. To better understand the collapse mechanism, this study presents a coupled thermo-mechanical numerical simulation of the building collapse. The actual collapse area is well reproduced by the proposed numerical model. The simulation further demonstrates that the initial damage happened to two interior columns exposed to temperature of 1300°C. Such damage was also attributable to the large gravity load they carried, and the complicated nature of the local structural arrangements. The adjacent structural members were subsequently damaged, because they were also weakened by the fire, and were over-loaded by the redistributed load. Failure of the two interior columns and adjacent area eventually triggered a progressive collapse. Further, the effect of some critical factors on the collapse mechanism is discussed. On the basis of this numerical case study, practical design considerations on the key structural components, the fire compartments, and the structural robustness are given for the prevention of the fire-induced progressive collapse of RC frame structures.

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“…2. Based on a column removal scenario, Li et al 28 revealed that the progressive collapse resistance of an RC frame is largely dependent on the catenary mechanism of the frame beam. Further studies by Yu and Tan, 14 Qian et al, 15 Ren et al, 16 and Lu et al, 29 and indicated that the resistance of an RC beam under the catenary mechanism is dominated by the area of the continuously arranged longitudinal reinforcement.…”

Section: B the Proposed Detailing Techniquementioning

confidence: 99%

A novel structural detailing for the improvement of seismic and progressive collapse performances of RC frames

Lin

et al. 2019

Earthq Engng Struct Dyn

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Summary Earthquake‐induced building collapse and progressive collapse due to accidental local failure of vertical components are the two most common failure modes of reinforced concrete (RC) frame structures. Conventional design methods usually focus on the design requirements of a specific hazard but neglect the interactions between different designs. For example, the progressive collapse design of an RC frame often yields increased reinforcement and flexural strength of the beams. As a result, the seismic design principle of “strong‐column‐weak‐beam” may be violated, which may lead to unfavorable failure modes and weaken the seismic performance. To avoid these adverse effects of the progressive collapse design on the seismic resistance of RC frames, a novel structural detailing is proposed in this study. The proposed detailing technique intends to concurrently improve the seismic and progressive collapse performances of an RC frame by changing the layout of the newly added longitudinal reinforcement against progressive collapse without introducing any additional reinforcement. A six‐story RC frame is used as the prototype building for this investigation. Both cyclic and progressive collapse tests are conducted to validate the performance of the proposed structural detailing. Based on the experimental results, detailed finite element (FE) models of the RC frame with different reinforcement layouts are established. The seismic and progressive collapse resistances of different models are compared based on the incremental dynamic analysis (IDA) and nonlinear dynamic alternate path (AP) methods, respectively. The results indicate that the proposed structural detailing can effectively resolve the conflict between the seismic and progressive collapse designs.

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Progressive Collapse Resistance Demand of RC Frames under Catenary Mechanism

Cited by 45 publications

References 16 publications

Virtual Scene Construction for Seismic Damage of Building Ceilings and Furniture

Virtual Scene Construction for Seismic Damage of Building Ceilings and Furniture

A Case Study on a Fire-Induced Collapse Accident of a Reinforced Concrete Frame-Supported Masonry Structure

A novel structural detailing for the improvement of seismic and progressive collapse performances of RC frames

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