scholarly journals EVALUATION OF THE USE OF CONCENTRIC STEEL BRACING TO IMPROVE SEISMIC PERFORMANCE OF REINFORCED CONCRETE FRAME BUILDING - EQUIVALENT STATIC ANALYSIS

2015 ◽  
Vol 04 (08) ◽  
pp. 443-457
Author(s):  
C Preeti .
Keyword(s):  
Reinforced Concrete ◽  
Static Analysis ◽  
Seismic Performance ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Frame Building ◽  
Steel Bracing

Evaluation of the seismic performance of a code-conforming reinforced-concrete frame building—from seismic hazard to collapse safety and economic losses

2007 ◽  
Vol 36 (13) ◽  
pp. 1973-1997 ◽  
Author(s):  
Christine A. Goulet ◽  
Curt B. Haselton ◽  
Judith Mitrani-Reiser ◽  
James L. Beck ◽  
Gregory G. Deierlein ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Seismic Hazard ◽  
Seismic Performance ◽  
Economic Losses ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Frame Building

scholarly journals Seismic performance of four-storey masonry infilled reinforced concrete frame building

2018 ◽  
Vol 195 ◽  
pp. 02017
Author(s):  
Isyana Ratna Hapsari ◽  
Senot Sangadji ◽  
Stefanus Adi Kristiawan
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Maximum Load ◽  
Reinforced Concrete Frame ◽  
Damage State ◽  
Ground Shaking ◽  
Infilled Frame ◽  
Concrete Frame ◽  
Frame Building ◽  
Log Normal

Masonry infilled reinforced concrete frames are a structural system commonly used for low-to-mid-rise buildings. Generally, this type of structure is modelled as an open frame neglecting the strength and stiffness contribution of the masonry infilled panel. In order to describe realistic behaviour under lateral loading, this paper evaluates the seismic performance of the building by modelling the contribution of masonry as a compression strut acting diagonally in the panel. The non-linear static procedure is employed by subjecting the building to pushover loads. The performance of the building is then analysed based on the obtained capacity curve. Seismic performance is assessed in terms of building fragility which is the conditional probability of exceeding certain damage state for a given ground shaking intensity. Fragility functions eventually are expressed as series of log-normal curves of both the open and masonry infilled reinforced concrete frame. Based on this study, the infilled frame can resist a maximum load of 20.3x103 kN, while the open frame is only able to withstand a maximum load of 15.2x103 kN. From the fragility curve, it can be concluded that the probability of the infilled frame to reach a certain damage state is lower than that of the open frame.

Behaviour of reinforced concrete frames rehabilitated with concentric steel bracing

2000 ◽  
Vol 27 (3) ◽  
pp. 433-444 ◽  
Author(s):  
H Abou-Elfath ◽  
A Ghobarah
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Concrete Frames ◽  
Reinforced Concrete Frame ◽  
Simplified Approach ◽  
Concrete Frame ◽  
Rc Frames ◽  
Damage Indices ◽  
Steel Bracing ◽  
Story Building

The seismic performance of low-rise nonductile reinforced concrete (RC) buildings rehabilitated using concentric steel bracing is investigated. A three-story building was analysed using various ground motion records. The effectiveness of the steel bracing in rehabilitating the three-story building was examined. The effect of the distribution of the steel bracing along the height of the RC frames on the seismic performance of the rehabilitated building was studied. The behaviour of the nonductile RC frame members is represented using a beam-column element capable of modelling the strength softening and the effects of the axial force on the yield moment and the deformation capacities at peak strength of these members. The performance of the building is evaluated in terms of global and story drifts and damage indices. A simplified approach is proposed for selecting the proper brace distribution.Key words: reinforced concrete, frame, nonductile, rehabilitation, concentric steel brace.

scholarly journals Seismic Performance of Reinforced Concrete Frame with Steel Bracing System

2019 ◽  
Vol 8 (3) ◽  
pp. 1029-1034
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Seismic Activity ◽  
Seismic Zone ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Steel Bracing ◽  
Different Types ◽  
Bracing System ◽  
Made In

The design of the 15 storey R.C building (seismic zone V) is made in accordance with IS 456:2000 using ETABS software. It is already reported that provision of concentric bracing throughout the building are reliable during seismic activity. Hence, this work is aimed to improve the performance of multi storey R.C. building by provision of eccentric steel bracing through analysis. Different types of bracing such as V bracing, Chevron bracing and Diagonal bracing are provided in concentric and eccentric manner. The effect of distribution of steel bracing throughout the height of the building is examined. It is found that the deflection in the building increases with increase in eccentricity. Moreover, V type bracing with 10 percentage eccentricity is found to be most reliable under seismic activity compared to other arrangements.

Seismic Performance Evaluation for Steel Reinforced Concrete Frame Structures

2011 ◽  
Vol 255-260 ◽  
pp. 2421-2425
Author(s):  
Qiu Wei Wang ◽  
Qing Xuan Shi ◽  
Liu Jiu Tang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Seismic Performance Evaluation ◽  
Steel Reinforced Concrete ◽  
Concrete Frame ◽  
Structural Capacity ◽  
Reinforced Concrete Frame Structures ◽  
Dynamic Nonlinear Analysis

The randomness and uncertainty of seismic demand and structural capacity are considered in demand-capacity factor method (DCFM) which could give confidence level of different performance objectives. Evaluation steps of investigating seismic performance of steel reinforced concrete structures with DCFM are put forward, and factors in calculation formula are modified based on stress characteristics of SRC structures. A regular steel reinforced concrete frame structure is analyzed and the reliability level satisfying four seismic fortification targets are calculated. The evaluation results of static and dynamic nonlinear analysis are compared which indicates that the SRC frame has better seismic performance and incremental dynamic analysis could reflect more dynamic characteristics of structures than pushover method.

Seismic performance of ductile medium height reinforced concrete frame buildings designed in accordance with the provisions of the 1995 National Building Code of Canada

1999 ◽  
Vol 26 (5) ◽  
pp. 606-617 ◽  
Author(s):  
A C Heidebrecht ◽  
N Naumoski
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Frame Structure ◽  
Performance Criteria ◽  
Building Code ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Moment Resisting Frame ◽  
Moment Resisting ◽  
Interstorey Drift

This paper describes an investigation into the seismic performance of a six-storey ductile moment-resisting frame structure located in Vancouver and designed and detailed in accordance with the seismic provisions of the National Building Code of Canada (1995). Both pushover and dynamic analyses are conducted using an inelastic model of the structure as designed and detailed. The structural performance of a number of design variations is evaluated using interstorey drift and member curvature ductility response as performance measures. All frames studied are expected to perform at an operational level when subjected to design level seismic excitations and to meet life safe performance criteria at excitations of twice the design level.Key words: seismic, building, frames, ductile, design, performance, reinforced concrete, code.

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