STUDY ON SEISMIC DAMAGE PREDICTION OF MEMBERS IN FISH-BONE SHAPED STEEL MOMENT FRAME SUBJECTED TO VERTICAL LOAD

This article deals with a method for seismic damage identification in buildings with steel moment-frame structure. The damage identification is based on artificial neural networks and natural frequencies. A simplified finite element model is used to obtain the data needed for training the nets. The method is simulated on a four-storey building under conditions as close as possible to reality. The robustness of the method and its sensitivity to the variations of the mass with time and the influence of the data errors is addressed. The statistical analysis of the results is successful, but it reveals that the predictions are quite sensitive to the data errors.

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SYSTEM IDENTIFICATION OF A FISH-BONE MODEL FOR USING DAMAGE DETECTION OF STEEL MOMENT FRAME BUILDING

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijs.81.1831 ◽

2016 ◽

Vol 81 (729) ◽

pp. 1831-1841

Author(s):

Kohei SOMA ◽

Kenji KANAZAWA ◽

Kenji HARA ◽

Haruyuki KITAMURA

Keyword(s):

System Identification ◽

Damage Detection ◽

Fish Bone ◽

Moment Frame ◽

Steel Moment Frame ◽

Bone Model ◽

Frame Building

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A Model of Steel Frame for Simulating Connection Fractures

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.452-453.469 ◽

2010 ◽

Vol 452-453 ◽

pp. 469-472

Author(s):

Hong Bo Liu ◽

Long Jun Xu ◽

Shuang Li ◽

Yong Song Shao

Keyword(s):

Seismic Damage ◽

Steel Frame ◽

Frame Structures ◽

Steel Beams ◽

Northridge Earthquake ◽

Seismic Evaluation ◽

Moment Frame ◽

Steel Moment Frame ◽

Welded Steel ◽

Panel Zone

Following the 1994 Northridge earthquake, widespread damages were discovered in welded steel moment frame buildings. In order to accurately simulate the typical seismic damage of welded steel moment frame structures, a new simplified model is proposed for performing seismic evaluation of welded steel moment frame structures. In this model, the slabs effect is considered, as well as the effects of the slip between slabs and steel beams, deformation of panel zone and connection fractures. Fracture toughness demands were evaluated in terms of the mode I stress intensity factor. The model was employed in simulation of seismic damage of Blue Cross Building which experienced fractured connections in the Northridge earthquake. It indicates that the model can accurately predict the earthquake response of welded steel moment frame structures and estimate the level of damage. The approach proposed in this paper has important meaning to the research on seismic damage of steel frame which may experience fractured connections.

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Seismic Performance of a Green Roof Structure

Sustainability ◽

10.3390/su13084278 ◽

2021 ◽

Vol 13 (8) ◽

pp. 4278

Author(s):

Svetlana Tam ◽

Jenna Wong

Keyword(s):

Green Roof ◽

Time History ◽

Green Roofs ◽

Moment Frame ◽

Steel Moment Frame ◽

Roof Structure ◽

Nonlinear Time History Analyses ◽

Vegetated Roofs ◽

Nonlinear Time History ◽

The Impact

Sustainability addresses the need to reduce the structure’s impact on the environment but does not reduce the environment’s impact on the structure. To explore this relationship, this study focuses on quantifying the impact of green roofs or vegetated roofs on seismic responses such as story displacements, interstory drifts, and floor level accelerations. Using an archetype three-story steel moment frame, nonlinear time history analyses are conducted in OpenSees for a shallow and deep green roof using a suite of ground motions from various distances from the fault to identify key trends and sensitivities in response.

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