Minimum loading requirements for areas of low seismicity

Lam, Nelson; Tsang, Hing‐Ho; Lumantarna, Elisa; Wilson, John L.

doi:10.12989/eas.2016.11.4.539

Cited by 21 publications

(17 citation statements)

References 34 publications

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“…Therefore, an estimated seismic hazard for Malaysia was modelled by using probabilistic seismic hazard assessment (PHSA) based on the reference data of historical seismological ground motions obtained from respective distant earthquakes [30], [31]. Prior PHSA studies concluded that the peak of ground acceleration (PGA) values across Peninsular Malaysia probably fell between 0.02 and 0.10 g with an approximation of a 475/500-year return period [32,33]. On the contrary, the PGA values at East Malaysia was around 0.07 g (Sarawak) and 0.12 g (Sabah) with a 500-year return period [34], [35].…”

Section: Fig 1 -Sumatran Fault Lines and Subduction Zone Of The Indimentioning

confidence: 99%

A Case Study on Structural Failure of Reinforced Concrete Beam-Column Joint After the First Significant Earthquake Impact in Malaysia

Ganasan

Tan

Ibrahim

et al. 2020

IJIE

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This paper presents a case study regarding failures of structural buildings which occurred in Malaysia after the first significant earthquake event dated on June 5, 2015. Ranau is a locality situated in Sabah, Malaysia on the island of Borneo. The seismic activity was triggered when an earthquake with a magnitude of 5.9 afflicted Ranau, including seven other districts that also felt the tremors. Even though the impact of magnitude was undisputedly not high, the severity level of damages was found to be absolute (irreparable) in the structural RC beam-column joints and soft-storey buildings. Most of the buildings in Malaysia were built without the consideration of seismic design, and thus a major factor in structural failure. The earthquake has directed the seismic demand, while the total displacement was concentrated at the weakest floor that caused more damage to the building. This paper shows the causes of beam-column joint damages and explains the proposed (to-date) strengthening methods. Future studies related to seismic activities are in need to analyse the performance of the existing design of structural RC members and propose seismic design in Malaysia.

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Section: Fig 1 -Sumatran Fault Lines and Subduction Zone Of The Indimentioning

confidence: 99%

A Case Study on Structural Failure of Reinforced Concrete Beam-Column Joint After the First Significant Earthquake Impact in Malaysia

Ganasan

Tan

Ibrahim

et al. 2020

IJIE

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“…First, it restricts the selection to a limited number of available ground motion records. This can be more problematic in regions of low-to-moderate seismicity like Hong Kong where there is a paucity of strong motion data that can be sourced locally (Lam et al, 2016). More importantly, the seismological parameters are imperfect proxies for the ground motion properties of interest (such as response spectra and duration) and those properties are only indirect indicators of seismic actions imposed on a structure (Iervolino and Cornell, 2005).…”

Section: Cms For Rock Sitesmentioning

confidence: 99%

Selection of earthquake ground motion accelerograms for structural design in Hong Kong

Jiao

Lam

Tsang

et al. 2020

Advances in Structural Engineering

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Hong Kong is situated in an intraplate area of low to moderate seismicity, where recorded strong-motion accelerograms are scarce. As part of the seismic design process, dynamic time-history analysis is sometimes required for assessing the seismic performance of structures. Hence, earthquake accelerograms representative of various local design hazard levels are needed. This study aims to develop a methodology for building up a database of earthquake accelerograms for the Hong Kong region which can be used for the analysis and design of a variety of structural and geotechnical systems. An outline of the previous probabilistic seismic hazard analysis studies conducted for Hong Kong is first presented and several design earthquake scenarios are determined, which contribute most to the local seismic hazard given a specific return period. The median response spectra and conditional mean spectra of the selected earthquake scenarios for reference rock sites are then derived based on the component attenuation model. The conditional mean spectra are then used as the target spectra for the selection and scaling of recorded accelerograms sourced from the available global database. Finally, a suite of conditional mean spectra–compatible accelerograms for rock sites is presented, from which event-specific and site-specific accelerograms are generated through dynamic site response analysis.

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“…With a 2% building replacement rate, the majority of the building stocks have not been specifically designed for earthquake resistance. Moreover, a statutory amendment in 2018 has stipulated a minimum design hazard level of 0.08 g across the whole country based on the recommendation made by the author and his colleagues [38], which implies that the levels of design earthquake actions have been elevated in some locations, e.g., Brisbane.…”

Section: Seismic Retrofitting Of Existing Buildingsmentioning

confidence: 99%

Innovative Upscaling of Architectural Elements for Strengthening Building Structures

Tsang

2019

Sustainability

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For conservation of heritages or life prolongation of aged buildings that contributes to environmental sustainability, there is a global need of structural strengthening or upgrading so as to restore their original functions or fulfil more stringent performance requirements stipulated in modern design codes of practice. However, the actual implementation is usually met with resistance from the property owner; hence, it is desirable to adopt an effective, economical and less invasive technique. In order to provide a further incentive, this article explores an innovative idea of upscaling decorative architectural elements, such as brackets, knee braces and corbels, in order that they also possess adequate strength capacity to resist extreme loadings such as earthquake actions. The required dimensions of architectural brackets for seismic retrofitting of concrete beam-column joints are calculated for different levels of seismicity through a parametric study. It is demonstrated that the proposed design can enhance both the aesthetics and structural performance of a building. This exemplifies how art can be integrated into engineering design for solving real-world problems.

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Minimum loading requirements for areas of low seismicity

Cited by 21 publications

References 34 publications

A Case Study on Structural Failure of Reinforced Concrete Beam-Column Joint After the First Significant Earthquake Impact in Malaysia

A Case Study on Structural Failure of Reinforced Concrete Beam-Column Joint After the First Significant Earthquake Impact in Malaysia

Selection of earthquake ground motion accelerograms for structural design in Hong Kong

Innovative Upscaling of Architectural Elements for Strengthening Building Structures

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