On the effect of the near field records on the steel braced frames equipped with energy dissipating devices

Bayat, Mahmoud

doi:10.1590/s1679-78252011000400004

Cited by 19 publications

(4 citation statements)

References 18 publications

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“…Hence, it is desired to develop a simplified method herein to obtain the displacement demand to facilitate displacement-based seismic design. Equal displacement rule is considered to be an efficient and accurate mechanism to estimate the displacement demand for elastoplastic SDOF systems (Clough and Penzien, 2003;Bayat and Abdollahzadeh, 2011). For elastoplastic SDOF structure, which generally satisfies equal displacement rule, the inelastic displacement demand obtained by Nonlinear Time History Analysis (NTHA) is very close to the elastic displacement demand obtained by Response Spectrum Analysis (RSA).…”

Section: Introductionmentioning

confidence: 94%

Lateral vibration analysis of continuous bridges utilizing equal displacement rule

Wei

Xia

Liu

2014

Lat. Am. j. solids struct.

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The application of equal displacement rule simplifies the evaluation of lateral displacement demand forSDOF system. For complex multi-degree-of-freedom (MDOF) structures such as continuous bridge systems, however, it requires more investigations. In this paper, a comprehensive parametric study of the ratio of maximum inelastic displacement to maximum elastic displacement for typical continuous bridges is performedto advance the application of equal displacement rule to MDOF systems. Particurlarly for the bridges with long periods, this adapted methodlogy is further simplified. It is concluded that equal displacement rule of MDOF is applicable to continuous bridges when the periods of the main modes are no less than the limiting period, which usually serves as an indication to the level of inelastic deformation for a bridge subjected to an earthquake. Key wordsEqual displacement rule, limiting period, continuous bridges, simplified seismic analysis, displacement demand Lateral vibration analysis of continuous bridges utilizing equal displacement rule INTRODUCTIONThe performance-based seismic design philosophy has been sufficiently developed to design a structure system to withstand a pre-defined level of damage under a pre-defined level of earthquake intensity. Displacement-based seismic design is an efficient and accurate method to achieve the performance-based seismic design philosophy, and it has been proposed and developed in recent years (Kowalsky, 2002;Jameel, Islam, Hussain, et al., 2013). In this methodology, the displacement demand of the designed structure should be close to the target displacement, which reflects the predefined level of damage of earthquake intensity. Therefore, to obtain the displacement demand of structure is an important step. Although analytical methods are widely utilized to calculate the displacement demand of structure, the analysis processes of currently available methods are relatively complex (Chopra and Goel, 2002;Wei, 2011;Akhaveissy, 2012). Hence, it is desired to develop a simplified method herein to obtain the displacement demand to facilitate displacement-based seismic design.

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Section: Introductionmentioning

confidence: 94%

Lateral vibration analysis of continuous bridges utilizing equal displacement rule

Wei

Xia

Liu

2014

Lat. Am. j. solids struct.

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“…Looking ahead for future trends in seismic design of steel structures, one cannot disregard the fact that several technically excellent solutions, based on sound research, ended up not having a practical acceptance as broad as once thought, primarily due to economic efficiency, as well as site and structural specificity. That might have been the case of structural isolation and supplementary damping [6,28,29].…”

Section: Design Philosophymentioning

confidence: 99%

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

et al. 2022

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The importance of connections in steel structures is paramount, not only because it greatly influences the cost of construction and provides room for innovations, but also due to the connections’ impact on global structural behaviour. Therefore, research into innovative connections for seismic applications and related design criteria has significantly grown in recent years. However, it has been pursued mostly on local—connection or frame—levels, leaving the system analysis and code compliance levels with a meagre investigation. Moreover, less than 1% of published papers concerning steel connections and earthquake engineering are review articles. To overcome this gap, this systematic review of more than 240 references, including scientific contributions and design codes in the field aimed to cover both recent research and current shortcomings in practice and regulations. It has been found that European design rules updated to a fully performance-based design philosophy is imminent and is deemed to bring pre-qualified joints and increased complexity. Design rules have been systematized, and current hindrances have been highlighted. A deeper look into research needs and trends showed that investigations in connections for concentrically X braced frames are still a necessity, while developments in self-centring and replaceable connections as well as in simple solutions for increasing damping are expected to modify how joints are designed, as soon as semi-rigid and partial strength connections are more easily allowed by design codes.

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“…The study by Bayat & Abdollahzadeh (2011) investigates the behaviour of structures with and without energy dissipating devices. The study discusses energy concepts under near field records, taking three cases for the analysis, including structures with five, ten and fifteen story concentric braced frames.…”

Section: Literature Reviewmentioning

confidence: 99%

Finite Element Modeling of Steel Plates Under Monotonic Loading

Shamsaldin¹

2022

Preprint

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Steel plate fuses can be used as energy dissipating devices in earthquake-resistant structures. After an earthquake, the structure remains essentially elastic and only the deformed fuse require replacement. This report simulates the monotonic response of steel plate specimens. The effects of different inputs such as imperfection, shape and size of the fuse openings, and different meshing types on yield strength, deformation, stress distribution, and displacement are studied by using ANSYS Mechanical APDL. The study found that increasing imperfection increases displacement and decreases yield strength. It was also concluded that as the hole size in the steel plate is increased, the fuse yield strength is slightly increased to a point then is decreased. Double diamond shape showed better response in terms of displacement and stress distribution, this is because of the link shape formed by the two holes. Finer quadrilateral meshing method provide precise simulation results over longer time.

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On the effect of the near field records on the steel braced frames equipped with energy dissipating devices

Cited by 19 publications

References 18 publications

Lateral vibration analysis of continuous bridges utilizing equal displacement rule

Lateral vibration analysis of continuous bridges utilizing equal displacement rule

Seismic Design of Bolted Connections in Steel Structures—A Critical Assessment of Practice and Research

Finite Element Modeling of Steel Plates Under Monotonic Loading

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