Seismic-Resistant Friction-Damped Braced Frame System with Buckling Restrained Columns

This paper investigates the effectiveness of various ground motion intensity measures (IMs) in estimating the structural response of two types of rocking systems: (a) a controlled rocking steel braced frame system with self-centering action and (b) a rocking spine system for reinforced concrete infill frames. The IMs are evaluated based on the dispersion in engineering demand parameter (EDP) predictions (efficiency) and the sensitivity of the conditional distributions of EDPs to the distributions of the magnitudes, distances and spectral shape parameter (ε) of ground motion records (sufficiency). The EDPs include maximum transient and residual story drifts and peak floor accelerations. The spectral acceleration averaged over a range of periods (Sa avg) is most effective for predicting transient and residual drift demands and peak ground acceleration (PGA) is generally the best predictor of peak floor accelerations. The proximity of the frequency range most affecting an EDP to that best reflected in an IM is found to be a good indicator of the performance of that IM.

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Analysis of main causes of defects of multi-storey reinforced concrete frame buildings

MATEC Web of Conferences ◽

10.1051/matecconf/201927902008 ◽

2019 ◽

Vol 279 ◽

pp. 02008

Author(s):

Vladimir Yamov ◽

Zoya Belyaeva

Keyword(s):

Reinforced Concrete ◽

Structural Damage ◽

Reinforced Concrete Frame ◽

Braced Frame ◽

Concrete Frame ◽

Floor Slabs ◽

Frame Buildings ◽

Frame System ◽

New Buildings ◽

Building Owner

Multi-storey reinforced concrete frame buildings are widespread in Russia. Most of these buildings have braced frame system, where the main load-bearing elements are columns, beams and hollow floor slabs, and the spatial rigidity is provided by additional diaphragms, staircase and elevator section. Such buildings are easy to design and build and are quite multifunctional in purpose. The article on the basis of the authors’ experience in the survey examines the main defects in such buildings. The causes of typical defects can be divided into objective, technological and operational reasons. Usually, the cause of survey can be structural damage discovered by the building owner that is why often the survey is conducted during the emergency condition, which can be avoided, if inspections and monitoring of the structures technical state are regular. Also there is a necessity of improving the design methods of new buildings and strengthening of existing ones.

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Multi-objective Performance-Based Design Optimization of a Controlled Rocking Steel Braced Frame System

Resilient Structures and Infrastructure ◽

10.1007/978-981-13-7446-3_10 ◽

2019 ◽

pp. 243-268 ◽

Cited By ~ 1

Author(s):

Henry V. Burton ◽

Ji Yun Lee ◽

Saber Moradi ◽

Shahrzad Dastmalchi

Keyword(s):

Design Optimization ◽

Performance Based Design ◽

Braced Frame ◽

Multi Objective ◽

Objective Performance ◽

Frame System ◽

Steel Braced Frame

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Comparative analysis and design of tower using diagrid, conventional moment frame and braced frame system of steel structures

MATEC Web of Conferences ◽

10.1051/matecconf/201927601026 ◽

2019 ◽

Vol 276 ◽

pp. 01026

Author(s):

Made Sukrawa ◽

Gede Pringgana ◽

Putu Diva Tryatra Sanjaya

Keyword(s):

Tall Buildings ◽

Steel Structures ◽

Moment Frame ◽

Braced Frame ◽

Analysis And Design ◽

Finite Element Software ◽

Frame System ◽

The Aesthetic ◽

Diagrid Structure ◽

Seismic Behaviors

The diagrid structure system has become an encouraging alternative for the construction of tall buildings partly because of the aesthetic reason. Structurally, the system also interesting because its diagonal intersecting members are capable of resisting vertical and lateral forces efficiently. This research compared the design of steel tower building using diagrid (DIA) system and the more commonly used systems, moment frame (MF) and braced frame (BF). Numerical modelling using finite element software ETABS were conducted to design a 10-story building of 15x15m with total height of 50 meters. The seismic behaviors of all models were compared under the same loading conditions. From the analysis results the DIA model showed superior seismic behavior followed by BF and MF. The DIA model was not only stiffer than the others, but also required smaller volume of steel.

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