scholarly journals Experimental Hysteretic Behavior and Application of an Assembled Self-Centering Buckling-Restrained Brace

2022 ◽  
Vol 148 (3) ◽  
Author(s):  
Hongmei Zhang ◽  
Liumeng Quan ◽  
Xilin Lu
Keyword(s):  
Hysteretic Behavior ◽  
Buckling Restrained Brace

Low-Cycle Fatigue Testing of a Novel Aluminum Alloy Buckling-Restrained Brace

2016 ◽  
Vol 710 ◽  
pp. 345-350 ◽  
Author(s):  
Ye Liu ◽  
Li Zhou ◽  
Chun Lin Wang
Keyword(s):  
Aluminum Alloy ◽  
Inner Core ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Hysteretic Behavior ◽  
Test Results ◽  
Cycle Fatigue ◽  
Buckling Restrained Brace ◽  
Design Variables

Compared with steel buckling-restrained braces, aluminum alloy BRBs show excellent advantages in structures where severe corrosion effects can be expected. At the same time, in order to avoid the effect of welding discussed in the previous research, a novel Aluminum alloy Bamboo-shaped Buckling-Restrained Brace (AL-BBRB) consisting of a bamboo-shaped inner core and an outer hollow circular tube was proposed and tested herein. Parametric studies with design variables including cross-sectional sizes of slubs and length of segments were conducted. A series of low-cycle fatigue tests, containing 4 specimens, were performed to address the low-cycle fatigue behavior of AL-BBRB specimens. According to test results of all specimens, stable hysteretic curves were obtained without any local and overall buckling. Consequently, the hysteretic behavior of AL-BBRB specimens is highly concerned with the design variables. Besides, failure positions of AL-BBRB specimens often concentrates on the end of the segment, which can be exactly predicted. Based on test results of all specimens, AL-BBRB specimens show a promising future for wide application in new or retrofitted buildings/bridges where lack the excellent seismic behavior and durability.

scholarly journals Local Buckling Behavior of Buckling-Restrained Braces with Longitudinally Profiled Steel Core

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 914
Author(s):  
Junkai Lu ◽  
Weichuang Liu ◽  
Yong Ding ◽  
Yingying Li ◽  
Shuquan Xu
Keyword(s):  
Friction Coefficient ◽  
Local Buckling ◽  
Hysteretic Behavior ◽  
Parameter Study ◽  
Element Analysis ◽  
Buckling Restrained Brace ◽  
Steel Core ◽  
Mortar Strength ◽  
Buckling Behavior ◽  
The Finite Element Analysis

One of the most important requirements for a well-designed buckling restrained brace (BRB) under severe earthquake loading is to ensure its stability until the brace achieves sufficient elasto-plastic deformation. This study presents the finite element analysis results of the proposed buckling restrained brace with a longitudinally profiled steel core (LPBRB). The objective of the analyses is to conduct a performance evaluation of the proposed LPBRBs, and to perform a parameter study with different clearance, width:thickness ratio, mortar strength, and friction coefficient for investigating the local buckling behavior of the LPBRBs. Numerical analyses results demonstrate that the LPBRBs exhibited good ductile performance and stable hysteretic behavior. The local buckling failure can be predicted by the demand:capacity ratio formula. The friction coefficient has little influence on the hysteretic behavior of LPBRBs. The local stability can be improved by adopting the mortar with higher compression strength or the LP core with lower width:thickness ratio. The proposed LPBRBs have a similar hysteretic response to the conventional BRBs.

scholarly journals Cumulative Ductility and Hysteretic Behavior of Small Buckling-Restrained Braces

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Hidajat Sugihardjo ◽  
Tavio
Keyword(s):  
Hysteretic Behavior ◽  
Structural System ◽  
Structural Components ◽  
Buckling Restrained Brace ◽  
Ductility Factor ◽  
Buckling Restrained Braces ◽  
Steel Sections ◽  
Energy Dissipated ◽  
Bilinear Functions ◽  
Steel Section

Cumulative ductility is defined as a ratio of total energy to elastic energy which is dissipated by an element of the structural system during cyclic loading. An element of the structural system is categorized hysteretic if the cumulative ductility factor fulfills certain criteria. This study investigated both analytically and experimentally Small Buckling-Restrained Braces (SBRBs). The core of bracings was modeled using Menegotto-Pinto and bilinear functions. The restrained bracing members were in the shape of square hollow steel section. They were made of the assembly of two L-shaped steel sections. From the experimental study on four SBRB specimens, it was proven that the proposed SBRBs have performed relatively stable hysteretic curves up to two percent of strain and the cumulative ductility factor of 199–450. This value is sufficient for the Buckling-Restrained Brace (BRB) elements as elastoplastic structural components. The comparisons of the hysteretic behaviors resulted by SBRB specimens using the Menegotto-Pinto functions and experiments exhibited good agreements, while the amount of energy dissipated by the SBRB specimens using the bilinear model agreed well with the experimental results. Based on the behavior of the experimental hysteretic, implementing the proposed SBRBs as components in ductile truss system is recommended.

Hysteretic behavior of traditional Chinese timber frames under cyclic lateral loads

2018 ◽  
Vol 60 (4) ◽  
pp. 378-386
Author(s):  
Qingfang Niu ◽  
Jia Wan ◽  
Tieying Li ◽  
Y. Frank Chen
Keyword(s):  
Hysteretic Behavior ◽  
Lateral Loads

Experimental Study on the Effect of Moisture Content on Hysteretic Behavior of Reinforced Concrete Columns

2018 ◽  
Vol 12 (1) ◽  
pp. 47-61
Author(s):  
Wenjuan Lv ◽  
Baodong Liu ◽  
Ming Li ◽  
Lin Li ◽  
Pengyuan Zhang
Keyword(s):  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Moisture Content ◽  
Early Stage ◽  
Damping Ratio ◽  
Concrete Columns ◽  
Hysteretic Behavior ◽  
Cyclic Test ◽  
Experimental Result ◽  
Reinforced Concrete Columns

Background: For reinforced concrete structures under different humid conditions, the mechanical properties of concrete are significantly affected by the moisture content, which may result in a great change of the functional performance and bearing capacity. Objective: This paper presents an experiment to investigate the influence of the moisture content on the dynamic characteristics and hysteretic behavior of reinforced concrete column. Results: The results show that the natural frequency of reinforced concrete columns increases quickly at an early stage of immersion, but there is little change when the columns are close to saturation; the difference between the natural frequencies before and after cyclic test grows as the moisture content rises. The damping ratio slightly decreases first and then increases with the increase of moisture content; the damping ratio after the cyclic test is larger than before the test due to the development of the micro-cracks. Conclusion: The trend of energy dissipation is on the rise with increasing moisture content, although at an early stage, it decreases slightly. According to the experimental result, a formula for the moisture content on the average energy dissipation of reinforced concrete columns is proposed.

scholarly journals Species-Specific Shifts in Diurnal Sap Velocity Dynamics and Hysteretic Behavior of Ecophysiological Variables During the 2015–2016 El Niño Event in the Amazon Forest

2019 ◽  
Vol 10 ◽  
Author(s):  
Bruno O. Gimenez ◽  
Kolby J. Jardine ◽  
Niro Higuchi ◽  
Robinson I. Negrón-Juárez ◽  
Israel de Jesus Sampaio-Filho ◽  
...  
Keyword(s):  
El Niño ◽  
El Nino ◽  
Hysteretic Behavior ◽  
Amazon Forest ◽  
El Niño Event ◽  
Species Specific

scholarly journals Hysteretic behavior of bladder afferent neurons in response to changes in bladder pressure

2016 ◽  
Vol 17 (1) ◽  
Author(s):  
Shani E. Ross ◽  
Zachariah J. Sperry ◽  
Colin M. Mahar ◽  
Tim M. Bruns
Keyword(s):  
Hysteretic Behavior ◽  
Bladder Pressure ◽  
Afferent Neurons

scholarly journals A Finite Element Study on Compressive Resistance Degradation of Square and Circular Steel Braces under Axial Cyclic Loading

2021 ◽  
Vol 11 (13) ◽  
pp. 6094
Author(s):  
Hubdar Hussain ◽  
Xiangyu Gao ◽  
Anqi Shi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cyclic Loading ◽  
Slenderness Ratio ◽  
Hysteretic Behavior ◽  
Element Analysis ◽  
Section Shape ◽  
Axial Cyclic Loading ◽  
Global Buckling ◽  
Parametric Studies

In this study, detailed finite element analysis was conducted to examine the seismic performance of square and circular hollow steel braces under axial cyclic loading. Finite element models of braces were constructed using ABAQUS finite element analysis (FEA) software and validated with experimental results from previous papers to expand the specimen’s matrix. The influences of cross-section shape, slenderness ratio, and width/diameter-to-thickness ratio on hysteretic behavior and compressive-tensile strength degradation were studied. Simulation results of parametric studies show that both square and circular hollow braces have a better cyclic performance with smaller slenderness and width/diameter-to-thickness ratios, and their compressive-tensile resistances ratio significantly decreases from cycle to cycle after the occurrence of the global buckling of braces.

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