Comparative Study on Seismic Fragility Assessment of Self-Centering Energy-Absorbing Dual Rocking Core versus Buckling Restrained Braced Systems under Mainshock–Aftershock Sequences

2021 ◽  
Vol 147 (9) ◽  
pp. 04021124
Author(s):  
Shuling Hu ◽  
Wei Wang ◽  
M. Shahria Alam
Keyword(s):  
Comparative Study ◽  
Seismic Fragility ◽  
Aftershock Sequences ◽  
Energy Absorbing

Seismic fragility assessment of self-centering hybrid precast walls subjected to mainshock-aftershock sequences

2021 ◽  
Vol 150 ◽  
pp. 106941
Author(s):  
Hao Wu ◽  
Xiaoying Zhu ◽  
Ying Zhou ◽  
Abderrahim Djerrad ◽  
Yue Chen ◽  
...  
Keyword(s):  
Seismic Fragility ◽  
Aftershock Sequences ◽  
Precast Walls

A Comparative Study of Energy Absorbing Foams for Head Impact Energy Management

1998 ◽  
Author(s):  
Lori Everitt ◽  
John Fialka ◽  
Michael Kerman ◽  
Edward Laabs
Keyword(s):  
Comparative Study ◽  
Energy Management ◽  
Impact Energy ◽  
Head Impact ◽  
Energy Absorbing

Comparative Study of Motorcycle Helmets Impact Performance

2014 ◽  
Vol 575 ◽  
pp. 306-310
Author(s):  
Hamzah Azhar ◽  
Aqbal Hafeez Ariffin ◽  
Solah Mohd Syazwan ◽  
Mohd Hafzi Md Isa ◽  
Yahaya Ahmad ◽  
...  
Keyword(s):  
Comparative Study ◽  
Impact Energy ◽  
Drop Test ◽  
Test Machine ◽  
Impact Speed ◽  
Impact Performance ◽  
Energy Absorbing ◽  
Motorcycle Helmets ◽  
Service Duration

Two sets of new and in-service helmets were impact tested using a drop test machine, in accordance to established helmet test protocols. The first test for full helmets was executed in compliance with standard speed requirements of 5.9 m/s in which three of five new helmets performed poorly. The second set utilized lower impact speed of 4 m/s for individual helmet components test. New helmet liners absorbed 5 times more impact energy than the in-service liners while the new shell was 19.3% better in dispersing impact energy than the in-service shell. The undesirable changes in liner thickness have explicit effect on the liner density which is translated into reduction in energy absorbing potential. In brief, exposure to weathering stresses and use intensities has affected helmet impact performance, regardless of service duration.

scholarly journals Improvements to lead-extrusion damper technology

1993 ◽  
Vol 26 (3) ◽  
pp. 342-348 ◽  
Author(s):  
W. J. Cousins ◽  
T. E. Porritt
Keyword(s):  
New Zealand ◽  
Seismic Isolation ◽  
Seismic Events ◽  
Manufacturing Costs ◽  
Alternative Design ◽  
Aftershock Sequences ◽  
Isolation Systems ◽  
Seismic Isolation Systems ◽  
Energy Absorbing ◽  
Constricted Tube

Lead-extrusion dampers are energy absorbing devices that have been designed to provide damping for seismic isolation systems. One type, called the constricted tube damper, has been manufactured for several applications in New Zealand. High manufacturing costs and some performance considerations associated with the damper led to consideration of an alternative design known as the bulged shaft damper. This report describes tests carried out on bulged shaft dampers of two sizes, 100kN and 700kN yielded force. Results show that the bulged shaft design of damper can be expected to perform well during major seismic events, including mainshock/aftershock sequences.

Sign in / Sign up

Export Citation Format

Share Document