An Overview of Post Earthquake Damage and Residual Capacity Evaluation for Reinforced Concrete Buildings in Japan

Maeda, Masaki; Alwashali, Hamood; Matsukawa, Kazuto

doi:10.7712/120119.6969.19228

Cited by 14 publications

(26 citation statements)

References 1 publication

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“…The repair works undertaken were divided into five classes, and the class adopted for each structural member was decided based on the member damage level. Damage level definitions were adopted from the JBDPA Guidelines, 7,26 and are summarized in Appendix B. The repair class definitions and the corresponding repair materials used are described in Table 2.…”

Section: Repair Of the Original Structurementioning

confidence: 99%

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: Repair Of the Original Structurementioning

confidence: 99%

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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“…Experimental results (Chiu et al, 2021;Colmenares and Santa Marı´a, 2021;Maeda et al, 2017;Marder, 2018;Moscoso et al, 2021;Opabola and Elwood, 2023) are reviewed to Source. Kawashima and Koyama (1988).…”

Section: Influence Of Prior Maximum Deformation Demandsmentioning

confidence: 99%

Limit states for post-earthquake assessment and recovery analysis of ductile concrete components

et al. 2023

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Post-earthquake assessment procedures require component deformation limits to identify locations for visual inspection and locations needing structural repair. This study proposes a framework for defining component deformation limits for detailed visual inspection and repair for earthquake-damaged concrete buildings. First, observations from cyclic tests of ductile concrete components (beams, columns, and walls) suggested that the residual capacity (in terms of strength and deformation capacity) of such components is likely uncompromised if the deformation at the initiation of lateral strength loss (LSL) is not exceeded in prior loading histories. The results also revealed that the deformation at the initiation of LSL typically corresponds to the onset of longitudinal bar buckling in ductile components. Furthermore, using experimental data, multipliers are developed as fractions of ASCE/SEI 41 modeling parameters at lateral failure (i.e. a or d) to predict deformation at initiation of LSL. Subsequently, a probabilistic approach is proposed for defining the component deformation limits, considering uncertainty in both capacity and demand. Component deformation limits for detailed visual inspection are defined such that there is a low probability (adopted as <10%) of exceeding the deformation at the initiation of LSL. The component deformation limit for repair is defined as the median deformation at the initiation of LSL (i.e. 50% probability of exceedance).

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“…There are 2 types of earthquakeresistant buildings, namely (1) conventional earthquake-resistant buildings that rely on the strength of the building materials, namely elastic (rigid) and ductile (ductile) properties, rigid properties are owned by materials from concrete and masonry, while clay properties are owned by metal, wood and bamboo, (2) buildings with base insulators. Base insulator is a material made of rubber and mild steel which is placed between the foundation (sub-structure) and sloof/column (super structure) which functions to reduce/reduce earthquake energy/acceleration of the subgrade to the building so that the destructive nature of the earthquake can be minimized [17]. Structures can be grouped into non-engineered and engineered structures.…”

Section: Earthquake Eventsmentioning

confidence: 99%

Identification Of Damage Levels Of Residents' Houses Due To Earthquake in Pasaman 2022

Imani

Kurniawan²,

Sahputra³

2022

jcivil

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The earthquake that occurred in Pasaman on February 25, 2022, has caused considerable losses to local residents. Thousands of buildings have been damaged and collapsed due to the earthquake, especially houses of residents, which in the field investigations are caused mainly by a lack of knowledge in building these houses. This study aims to identify the level of damage to houses damaged by the earthquake in Nagari Malampah, Pasaman District, West Sumatera. This research method is carried out by direct observation and investigation of the research location, then identifying the level of damage to residents' houses, by taking 10 samples of affected residents' houses. Of the 10 houses, the percentage of damage will be grouped based on the level of Light Damage, Medium Damage, and Heavy Damage, with reference to the Technical Guidelines for the Director General of Human Settlements, SNI 1726-2019, and PU Guidelines. The results of this study indicate that the percentage of the level of damage to houses that are lightly damaged ranges from 7.1% - 26%, the level of moderate damage ranges from 32.5% - 36.09%, and the level of residential buildings that experience severe damage (total collapse) ranged from 50% - 100%.

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An Overview of Post Earthquake Damage and Residual Capacity Evaluation for Reinforced Concrete Buildings in Japan

Cited by 14 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

Limit states for post-earthquake assessment and recovery analysis of ductile concrete components

Identification Of Damage Levels Of Residents' Houses Due To Earthquake in Pasaman 2022

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