Seismic response of exterior RC wide beam–narrow column joints: Earthquake-resistant versus as-built joints

2013 ◽  
Vol 57 ◽  
pp. 394-405 ◽  
Author(s):  
A.M. Elsouri ◽  
M.H. Harajli
Keyword(s):  
Seismic Response ◽  
Wide Beam ◽  
Earthquake Resistant

Seismic Response of Slab Culvert in Loess Region

2012 ◽  
Vol 204-208 ◽  
pp. 2461-2464 ◽  
Author(s):  
Hai Bo Wang ◽  
Yu Tao Pan ◽  
Jun Min Shen ◽  
Jun Jie Zheng
Keyword(s):  
Numerical Analysis ◽  
Seismic Response ◽  
Seismic Wave ◽  
Incident Angle ◽  
Numerical Results ◽  
Dynamic Loads ◽  
Active Area ◽  
Underground Structures ◽  
Earthquake Resistant ◽  
Loess Region

Buried culverts are usually considered to be earthquake-resistant underground structures. Therefore, few studies have been conducted to investigate the seismic response of slab culverts under high fill embankment which are usually subjected to extreme dynamic loads. This paper presents a numerical analysis of the seismic response of slab culvert under high fill embankment in a loess region which is also a seismically active area in China. The influence of important factors such as fill height, incident angle of seismic wave and magnitude of earthquake on the response of culvert is carefully examined. And possible failures of culverts are also analyzed according to the numerical results.

Seismic Strengthening of Non-Ductile R/C Structures Using Infill Wall or Ductile Steel Bracing

2012 ◽  
Vol 602-604 ◽  
pp. 1583-1587 ◽  
Author(s):  
Marco Valente
Keyword(s):  
Seismic Response ◽  
Numerical Models ◽  
Original Structure ◽  
Structural Members ◽  
Infill Wall ◽  
Steel Bracing ◽  
Earthquake Resistant ◽  
Ductile Steel ◽  
Displacement Based ◽  
Nonlinear Dynamic Analyses

This study deals with the seismic assessment and retrofitting of existing non-ductile R/C structures and the issue of selecting effective strengthening solutions is addressed. A displacement based procedure using nonlinear static pushover analyses is adopted in order to assess the main characteristics of the original structure and to select valuable retrofitting strategies. The procedure is applied to a four-storey R/C frame tested at the JRC ELSA Laboratory some years ago. The R/C frame was designed for gravity loads without specific earthquake-resistant provisions. Accurate numerical models are developed to reproduce the seismic response of the R/C frame in both the original and retrofitted configurations. The effectiveness of two strengthening techniques is examined. First, a retrofitting intervention is carried out by adding a concrete shear wall to the short bay of the frame. This solution is efficient in controlling global lateral drift and thus reducing damage in structural members. Then, a retrofitting solution involving the introduction of eccentric steel bracing is investigated in order to reduce the displacement demand and to increase the energy dissipation capacity of the frame. Nonlinear dynamic analyses are performed to assess and compare the seismic response of the frame in the original and retrofitted configurations.

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