Shake-Table Test of a 4-Story Frame-Wall Rc Structure to Investigate the Collapse Mechanism and Safety Limit

Miura, Kota; Fujita, Kisho; Tabata, Yu; Maeda, Masaki; SHEGAY, Alex; Yonezawa, Kenji

doi:10.3130/aijs.86.247

Cited by 5 publications

(6 citation statements)

References 1 publication

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“…For details, the reader is referred to. 18 Examples of final damage observed at the end of the testing (and after correction of residual drift) is shown in Figure 6. Cracking throughout the structure was observed following Run 1.…”

Section: Results Of Testing Of the Original Structurementioning

confidence: 99%

Section: Original Structure Experimental Program Overviewmentioning

confidence: 99%

“…In this study, a ¼‐scale 4‐storey RC frame‐wall structure tested in a previous study (hereinafter referred to as the “Original” structure) 18 was repaired and re‐tested on a shake‐table (hereinafter referred to as the “Repaired” structure). The details of the Original test structure and its seismic performance are revisited briefly in this section (details can be found in a previous publication 18 ). The test structure's overall dimensions are shown in Figure 1 and details of the member cross‐sections of the structure (denoted CW1/CW2 for walls, C1 for columns, and G1/G2/G3 for beams) are shown in Table 1.…”

Section: Original Structure Experimental Program Overviewmentioning

confidence: 99%

“…In this section, a brief explanation of the loading sequence and damage progression of the Original structure is provided. For details, the reader is referred to 18 . Examples of final damage observed at the end of the testing (and after correction of residual drift) is shown in Figure 6.…”

Section: Original Structure Experimental Program Overviewmentioning

confidence: 99%

“…With exception of, 17 which will be referred to in subsequent discussions, research on system‐level performance recovery of repaired structures is highly limited. In this paper, the effectiveness of repair on the system‐level structural performance recovery is investigated by shake‐table testing of a previously damaged ¼‐scale 4‐storey RC structure that exhibited flexural damage characteristics (flexural cracks, spalling of concrete, buckling of reinforcement) 18 . As performance is thought to depend on the level of initial damage, the research presented herein takes a “limiting‐case” approach by considering the effect of repairs on a severely damaged structure.…”

Section: Introductionmentioning

confidence: 99%

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Performance recovery of a repaired 4‐storey reinforced concrete structure subjected to shake‐table testing

SHEGAY

Miura

Akira

et al. 2023

Earthq Engng Struct Dyn

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Understanding the effects of repair on reinforced concrete (RC) structures is critical to evaluating their performance in future earthquakes. In this research, a system‐level approach is taken by repairing a previously damaged ¼ scale 4‐storey RC structure and subjecting it to a series of dynamic excitations via shake table testing. The repair was undertaken using common construction materials with the primary motivation of restoring original performance. The performance of the repaired structure was compared to that of the original structure prior to repairs. It was found that overall initial stiffness of the structure was recovered to 66% of the original initial stiffness and was generally higher in floors where more intensive repair works were undertaken. Damping capacity was quantified via equivalent viscous damping ratio using three different methods. Regardless of the calculation method, the damping capacity recovery was around 80% for low‐moderate drifts and 100% for high drifts. While collapse was not induced in the structure, drift ratio demands of over 5% could be achieved both before and after repairs, suggesting a full practical recovery of deformation capacity. Structural strength of the repaired structure was found to be 17% higher than that of the original structure.

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Section: Results Of Testing Of the Original Structurementioning

confidence: 99%

Section: Original Structure Experimental Program Overviewmentioning

confidence: 99%

Section: Original Structure Experimental Program Overviewmentioning

confidence: 99%

Section: Original Structure Experimental Program Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Performance recovery of a repaired 4‐storey reinforced concrete structure subjected to shake‐table testing

SHEGAY

Miura

Akira

et al. 2023

Earthq Engng Struct Dyn

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Evaluation of seismic residual capacity ratio for reinforced concrete structures

SHEGAY¹,

Miura²,

Fujita³

et al. 2023

Resilient Cities and Structures

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Updating of Performance Curve of an Equivalent Single-Degree-of-Freedom System and Damage Level Classification Based on Seismic Response Observation

YI,

OONO,

MONICAL

et al. 2024

Journal of Structural Engineering B

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After a severe earthquake, a practical disaster relief strategy requires accurate information related to the damage level of buildings [1][2]. To properly carry out such a strategy while maintaining urban resilience, it is necessary to determine damage levels of affected buildings as soon as possible [3].According to Japan Building Disaster Prevention Association [4], the most common method for damage evaluation is conducted through visual inspection. This method provides an accurate evaluation of the damage level of a building. However, an accurate visual-based assessment requires highly skilled engineers and is time-consuming. [5][6]. Additionally, in cases of severe damage, some buildings might become inaccessible, reducing the usefulness of the visual method. To overcome this, automatic processes for damage evaluation have been researched [7].A structural health monitoring (SHM) system is a viable alternative to visual inspections because the former can automatically and immediately record the structural response using output measurements such as floor acceleration [8][9]. Although it is not difficult to estimate structural response, the way to evaluate damage using said response remains unclear [10].Hence, the evaluation of the performance curve and the classification of the current damage level requires a detailed investigation. and proposed the implementation of the scaling and characteristic point method for updating the performance curve based on analytical models and observed data (introduced in Sec. 2), and a damage classification method based on the identification of characteristic points corresponding to the following limit states: cracking, yielding, flexural mechanism, and ultimate conditions. Nevertheless, these methods were applied for one case only, and therefore, a range of applications and its effect on the accuracy of the method must be verified.The limitations of the described procedure include the following: 1) For typical buildings, the response to low-intensity earthquakes is available but it is less common to obtain observations after yielding, and 2) differences between analytical model and observation tend to decrease the accuracy of the updating procedure and damage evaluation method.

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Shake-Table Test of a 4-Story Frame-Wall Rc Structure to Investigate the Collapse Mechanism and Safety Limit

Cited by 5 publications

References 1 publication

Performance recovery of a repaired 4‐storey reinforced concrete structure subjected to shake‐table testing

Performance recovery of a repaired 4‐storey reinforced concrete structure subjected to shake‐table testing

Evaluation of seismic residual capacity ratio for reinforced concrete structures

Updating of Performance Curve of an Equivalent Single-Degree-of-Freedom System and Damage Level Classification Based on Seismic Response Observation

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