Evaluation of collapse resistance of RC frame structures for Chinese schools in seismic design categories B and C

Bao-xin, Tang; Lu, Xinzheng; Ye, Lieping; Shi, Wei

doi:10.1007/s11803-011-0073-1

Cited by 26 publications

(19 citation statements)

References 5 publications

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“…CMR is defined as the ratio of the actual collapse resistance of the structure to the earthquake intensity of the specified collapse-prevention level (maximum considered earthquake). Thus, CMR is conceptually similar to a safety factor (Tang et al 2011). If we take the actual average collapse resistance of the structure, represented by the ground motion intensity under which there is a 50% chance of collapse, as Sa(T1)50%collapse, and the ground motion intensity of the maximum considered earthquake as Sa(T1)MCE, the CMR corresponding to the maximum considered earthquake is calculated as:…”

Section: Methodsmentioning

confidence: 99%

Comparison of collapse-resistance capacities of RC frames with and without viscous dampers

Zhang¹,

Song²,

Chen³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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In modern seismic design, damping devices are often used to dissipate seismic energy and therefore enable a control of the structural response to earthquake ground excitation. As a result, the member section sizes or the amount of reinforcement in a structure with dampers may be reduced from those without dampers. Although both designs may be made as equivalent in terms of their performances under design earthquakes, their capacities in resisting collapse under the worst credible earthquake scenarios could be different, and there is little information from the literature that addresses this concern. In this paper, the collapse-resistance capacities of RC frames designed for different seismic hazard levels with and without dampers are calculated through a collapse fragility analysis using an incremental dynamic analysis approach, and the results are compared. On this basis, a proposal is put forward for the purpose to enhance the collapse-resistance capacities of structures with dampers in high seismic hazard levels. The effectiveness of the proposed enhancement is demonstrated. KEYWORDSRC frame, seismic design, damping effect, incremental dynamic analysis, collapse fragility analysis.

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Section: Methodsmentioning

confidence: 99%

Comparison of collapse-resistance capacities of RC frames with and without viscous dampers

Zhang¹,

Song²,

Chen³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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“…The use of collapse fragility curves to assess the collapse safety of structures has recently become a common practice (e.g., Zareian, 2006;Tang et al, 2011;Eads et al, 2013). The collapse fragility curve obtained by using a scalar IM shows how the probability of collapse of a structure increases with increasing IM level.…”

Section: Collapse Fragility Surfacesmentioning

confidence: 99%

Optimal vector-valued intensity measure for seismic collapse assessment of structures

Yakhchalian

Nicknam

Amiri

2015

Earthq. Eng. Eng. Vib.

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The present study is aimed to investigate the ability of different intensity measures (IMs), including response spectral acceleration at the fundamental period of the structure, S a (T 1 ), as a common scalar IM and twelve vector-valued IMs for seismic collapse assessment of structures. The vector-valued IMs consist of two components, with S a (T 1 ) as the fi rst component and different parameters that are ratios of scalar IMs, as well as the spectral shape proxies ε Sa and N p , as the second component. After investigating the properties of an optimal IM, a new vector-valued IM that includes the ratio of S a (T 1 ) to the displacement spectrum intensity (DSI) as the second component is proposed. The new IM is more effi cient than other IMs for predicting the collapse capacity of structures. It is also suffi cient with respect to magnitude, source-to-site distance, and scale factor for collapse capacity prediction of structures. To satisfy the predictability criterion, a ground motion prediction equation (GMPE) is determined for S a (T 1 )/DSI by using the existing GMPEs. Furthermore, an empirical equation is proposed for obtaining the correlation between the components of the proposed IM. The results of this study show that using the new vector-valued IM leads to a more reliable seismic collapse assessment of structures.

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“…Indeed, the IDAbased collapse fragility evaluation approach has been used worldwide to assess the seismic collapse capacity of structural systems in order to improve the collapse safety design (Luco et al 2007;FEMA 2009;Haselton et al 2010;Liel et al 2010;Tang et al 2011;Lu et al 2012). Nevertheless, a rigorous IDA-based collapse fragility evaluation approach is computationally demanding that has prompted many researchers seeking simplified, approximate and practical methods to assess the collapse resistance of structures (Han et al 2010;Shafei et al 2011;Fajfar and Dolšek 2011).…”

Section: Development Of Seismic Collapse Capacity Spectra and Parametmentioning

confidence: 99%

Development of Seismic Collapse Capacity Spectra and Parametric Study

Shi

Guan

et al. 2014

Advances in Structural Engineering

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Single-Degree-of-Freedom (SDOF) systems are widely used to investigate the collapse resistance of building structures. A SDOF model capable of representing the key properties associated with earthquake-induced collapse is outlined in this study. The seismic collapse capacity of SDOF systems is evaluated via an incremental dynamic analysis, based on which the collapse capacity spectrum is developed. The computational procedure and engineering significance of the collapse capacity spectrum are elaborated in some detail. The influence of various structural properties on the collapse resistance of SDOF structural systems is also comprehensively discussed, which include fundamental period, ductility ratio, post-capping stiffness, hysteretic pinching, cyclic deterioration and P-Δ effect. Furthermore, the influence of ground motion features on the collapse resistance of SDOF systems is examined by using the proposed collapse capacity spectrum.

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Evaluation of collapse resistance of RC frame structures for Chinese schools in seismic design categories B and C

Cited by 26 publications

References 5 publications

Comparison of collapse-resistance capacities of RC frames with and without viscous dampers

Comparison of collapse-resistance capacities of RC frames with and without viscous dampers

Optimal vector-valued intensity measure for seismic collapse assessment of structures

Development of Seismic Collapse Capacity Spectra and Parametric Study

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