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

Hysteretic Behavior of Damaged Walls Strengthened by Aramid Fiber Sheet and Additional Reinforcement

2014 ◽  
Vol 893 ◽  
pp. 606-609
Author(s):  
Hyun Ho Lee ◽  
Young Soo Chun
Keyword(s):  
Performance Test ◽  
Residential Buildings ◽  
Aramid Fiber ◽  
Hysteretic Behavior ◽  
Test Results ◽  
Lateral Loads ◽  
Fiber Sheet ◽  
Strength And Deformation ◽  
Constant Axial Load ◽  
Strengthening Method

To improve the seismic performance of existing residential buildings, strengthening methods for T-shaped walls are evaluated through the performance tests. Almost damaged three specimens are strengthened by aramid fiber sheet and additional reinforcement. Cyclic lateral loads are applied to the top of the specimen with constant axial load. From these, strengthened wall by aramid fiber sheet and additional reinforcement shows the almost 100% strength and deformation capacity recovery comparing the undamaged wall. For the convenience of wall strengthening method in a residential state, using of aramid fiber sheet is recommended from this performance test results.

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.

scholarly journals A Few Points of the Engineering Logic Discussed in ITER EDA on Evaluation of Halo- and AVDE-Induced Loads in Tokamaks

Plasma ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 366-375
Author(s):  
Sergey Sadakov
Keyword(s):  
Vertical Displacement ◽  
Lateral Loads ◽  
Axially Symmetric ◽  
Vertical Displacement Events

All tokamaks are designed to withstand a certain number of energetic electromagnetic (EM) transients caused by uncontrolled terminations of plasma pulses, including symmetric and asymmetric plasma vertical displacement events: VDEs and AVDEs. These events generate significant pulsed EM loads in all conductive components and coils. Axially symmetric transient EM loads induced by VDEs without Halo current have been calculated well since the 1980s; however, Halo-related EM load components and lateral loads associated with AVDEs still cause discussions. The author worked on fast plasma and EM transients in tokamaks quite a while ago then deviated to other areas but has been keeping track of the topic since. He is aware of discussions of the modelling of Halo currents and of significant scatter present in current estimates for AVDE-induced lateral loads and contends that some points of engineering logic formulated earlier on this topic may help reduce these uncertainties. This article summarises a few points of the engineering understanding developed in informal discussions within the ITER EDA team with the purpose to preserve these points for all tokamak developments.

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