Seismic behavior of dual buckling-restrained steel braced frame with eccentric configuration and post-tensioned frame system

2021 ◽  
Vol 151 ◽  
pp. 106977
Author(s):  
Mohammad Gholami ◽  
Elnaz Zare ◽  
Mojtaba Gorji Azandariani ◽  
Reza Moradifard
Keyword(s):  
Seismic Behavior ◽  
Braced Frame ◽  
Frame System ◽  
Steel Braced Frame ◽  
Post Tensioned

Ground Motion Intensity Measures for Rocking Building Systems

2017 ◽  
Vol 33 (4) ◽  
pp. 1533-1554 ◽  
Author(s):  
Mehrdad Shokrabadi ◽  
Henry V. Burton
Keyword(s):  
Ground Motion ◽  
Structural Response ◽  
Ground Acceleration ◽  
Intensity Measures ◽  
Braced Frame ◽  
Residual Drift ◽  
Engineering Demand Parameter ◽  
Frame System ◽  
Ground Motion Records ◽  
Steel Braced Frame

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.

Hybrid simulation testing of a self-centering rocking steel braced frame system

2014 ◽  
Vol 43 (11) ◽  
pp. 1725-1742 ◽  
Author(s):  
Matthew R. Eatherton ◽  
Jerome F. Hajjar
Keyword(s):  
Hybrid Simulation ◽  
Braced Frame ◽  
Frame System ◽  
Simulation Testing ◽  
Steel Braced Frame

Improving the torsional response of asymmetric buildings with self-centering controlled rocking steel braced frame system

2022 ◽  
pp. 136943322110509
Author(s):  
Maryam Hafezi ◽  
Armin Aziminejad ◽  
Mohammad Reza Mansoori ◽  
Mahmood Hosseini ◽  
Abdolreza Sarvghad Moghadam
Keyword(s):  
Center Of Mass ◽  
Asymmetric Structure ◽  
Maximum Displacement ◽  
Braced Frame ◽  
Asymmetric Buildings ◽  
Frame System ◽  
Strength And Stiffness ◽  
Ground Motion Records ◽  
Energy Absorbing ◽  
Steel Braced Frame

Self-centering controlled rocking steel braced-frame (SC-CR-SBF) is proposed as an earthquake-resistant system with low damage. Pre-stressed vertical strands provide a self-centering mechanism in the system and energy absorbing fuses restrict maximum displacement. Presence of asymmetry in structures can highlight the advantages of employing this structural system. Moreover, these days designing and constructing asymmetric and irregular structures is inevitable and as a result of architectural attractiveness and requirements of different functions of buildings, they are of great importance. Consequently, in these types of structures in order to minimize seismic responses, particular measures should be taken into consideration. Proper distribution of strength and stiffness throughout the plan of structures with self-centering systems can play a considerable role in resolving problems associated with asymmetry in these structures. In this study, the asymmetric buildings with 10% and 20% mass eccentricities and having different arrangements of centers were simulated. The models were analyzed under a set of 22 bidirectional far-field ground-motion records and corresponding responses of maximum roof drift, acceleration and rotation of the roof diaphragms of the structures with different arrangements of the center of mass, stiffness and strength were computed and studied. Results show that proper distribution of stiffness and strength throughout the plan of the structures with SC-CR-SBF system reduces the maximum roof drift as well as the rotation of the roof diaphragm. With appropriate arrangement of the centers, maximum drift response of the asymmetric structure decreases as much as roughly 20% and the ratio of the maximum drift response of the asymmetric structure to the response of the similar symmetric structure with the same overall stiffness and strength was 1.1. In other words, maximum drift response of the asymmetric structure with SC-CR-SBF system is acceptably close to the one for the symmetric building.

Self-centering links using post-tensioned composite tendons

2017 ◽  
Vol 21 (9) ◽  
pp. 1302-1312 ◽  
Author(s):  
Xian Xu ◽  
Yanfeng Zheng ◽  
Yaozhi Luo
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
General Scheme ◽  
Structural Systems ◽  
Preliminary Design ◽  
Braced Frame ◽  
Alloy Material ◽  
Frame System ◽  
The Given ◽  
Post Tensioned

A new concept of self-centering links using post-tensioned composite tendons consisting of shape memory alloy rods and steel rods is proposed. This new concept is applicable to both short and long links and is able to fully exploit the hysteresis capacity of the used shape memory alloy material. A general scheme for preliminary design of the proposed self-centering links is developed. A typical example is used to verify the proposed concept and its design scheme. A comparison between the example using composite tendons and the previously reported example using pure shape memory alloy tendons is carried out. It is found that the system using composite tendons needs less than half of the shape memory alloy material needed by the system using pure shape memory alloy tendons to possess comparable hysteresis properties meeting the given design demands. The new concept of self-centering links is applied to a typical eccentrically braced frame system to validate its feasibility and advantages in structural systems.

Research on Seismic Performance of the Steel-Braced Frame

2014 ◽  
Vol 540 ◽  
pp. 197-200
Author(s):  
Chang Jiao Hu ◽  
Xin Wu Wang
Keyword(s):  
Energy Dissipation ◽  
Seismic Performance ◽  
Braced Frame ◽  
Hysteretic Performance ◽  
Frame System ◽  
Steel Braced Frame

With the purpose of comprehending the seismic performance of steel-braced frame system better and more comprehensivly, the paper overviewed and summarized the hysteretic performance,ductility and energy dissipation performance of the steel-braced frame based on a large number of abroad documents.The force was on the seismic performance of steel-braced frame in different supporting forms and the insufficiency in the research.

Optimal control on structural response using outrigger braced frame system under lateral loads

2020 ◽  
Vol 5 (1) ◽  
pp. 40-50
Author(s):  
Kashif Salman ◽  
Dookie Kim ◽  
Ataullah Maher ◽  
Abdul Latif
Keyword(s):  
Optimal Control ◽  
Structural Response ◽  
Lateral Loads ◽  
Braced Frame ◽  
Frame System

11.06: Application of hybrid simulation for the evaluation of the buckling response of steel braced frame columns

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 2877-2886 ◽  
Author(s):  
Ali Imanpour ◽  
Martin Leclerc ◽  
Romain Siguier ◽  
Robert Tremblay
Keyword(s):  
Hybrid Simulation ◽  
Braced Frame ◽  
Steel Braced Frame
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