CivilEA.com
  • Subscribe !
  • Register
  • Login
  • Home
  • Members
  • Help
  • Search
Civil Engineering Association eBooks Structural Dynamics and Earthquake Engineering Reinforced Concrete under Large Seismic Action

Reinforced Concrete under Large Seismic Action
 TAFATNEB

Professional Member

Registered
Algeria
User ID: 29701
Joined: Sep 2010
Posts: 1,197
Threads: 830
Likes: 9,403 in 1,160 posts
Given Likes: 2850
Points:118,565 EP
#1
02-11-2015, 08:33 AM
Reinforced Concrete under Large Seismic Action

Author: João Luís Domingues Costa | Size: 3.77 MB | Format: PDF | Quality: Unspecified | Publisher: BYG·DTU R-076 | Year: 2003 | pages: 65 | ISBN: 87-7877-139-0

[Image: 19736964137379314093.jpg]


[Image: info.png]

Seismic design procedures were first incorporated in building design codes in the 1920s and 1930s when inertial loadings began to be appreciated. In the absence of reliable ground measurements during an earthquake as well as detailed knowledge of the dynamical response of structures, the seismic action was taken into account for design purposes as a statical horizontal force corresponding to about 10% of the weight of the structure.
By the 1960s ground measurements during an earthquake in the form of accelerograms were becoming more generally available. At the same time the development of strength design philosophies and of computer-based analytical procedures such as the spectral-modal analysis and the time-history analysis, facilitated the examination of the dynamical response of multi-degree-of-freedom structures (MDOF). According to these procedures, the calculations were carried out in a deterministic fashion. The response of the structure was assumed to be in the elastic range and the earthquake loading was taken into account considering the typical seismic intensity and soil nature of the site of the structure.
As the records of strong ground motion were increasing, it became apparent that the code provisions were inadequate in providing the required structural strength of the building to withstand an intense earthquake. This was recognized analysing the damage in structures that had been close to resonance. In fact the vibrating masses of structures in such a situation had often been exposed to accelerations from two to six times the maximum base acceleration that, of course, would induce forces on the structural elements much larger than expected in the design phase. However the lack of strength did not always result in failure and sometimes not even severe damage. On the other hand in specified regions of the structure (especially the ones with shear dominated behaviour) a rapid reduction in strength (brittle failure) was observed leading to local failure that often resulted in the formation of mechanisms and consequently collapse of the structure.
This type of observations called the attention of structural engineers to the property of the materials or of the structures to offer resistance in the inelastic domain of response. This property is generally known as ductility and includes the ability to sustain deformations in the inelastic range without significant loss of strength and a capacity to absorb energy by hysteretic behaviour

[Image: download.png]
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:

http://forum.civilea.com/thread-27464.html
***************************************


This post has been made by CivilEA Post-Generator v2.2.0



[-] The following 22 users Like TAFATNEB's post:22 users Like TAFATNEB's post
  • sabooryan, PinkPant, bridgeengineer, cace-01, sodapas, blaze, rezart, melekeen, oanm2000, Jackass, zrilek, vardan, agarciam2, ruaumoko, amindoxiti, malc, subin91, Dell_Brett, mgdario, cristi, scorpion07, kowheng
« Next Oldest | Next Newest »

Users browsing this thread: 1 Guest(s)



Possibly Related Threads…
Thread Author Replies Views Last Post
  Seismic Design of Reinforced Concrete Buildings cace-01 10 4,265 05-25-2024, 10:30 AM
Last Post: poolmand
  Seismic Design Aids for Nonlinear Analysis of Reinforced Concrete Structures pezhmankhan 11 7,300 05-05-2019, 12:17 AM
Last Post: kowheng
  Seismic Design of Reinforced Concrete structure (Notes) david-smith 1 1,952 07-10-2018, 05:22 AM
Last Post: jeevaniitn
  Nonlinear Seismic Analysis and Design of Reinforced Concrete Buildings lisine 7 3,728 07-06-2018, 09:24 PM
Last Post: rami1976
  Seismic Design of Reinforced Concrete Structures RyanRS 0 838 10-22-2015, 05:28 AM
Last Post: RyanRS
  Conceptual Seismic Design Guidance for New Reinforced Concrete Framed Infill Building TAFATNEB 1 1,093 12-21-2014, 05:42 PM
Last Post: abouferass88
  JAPANESE SEISMIC DESIGN OF HIGH-RISE REINFORCED CONCRETE BUILDINGS - AN EXAMPLE OF PE TAFATNEB 0 998 09-01-2013, 10:58 PM
Last Post: TAFATNEB

  • View a Printable Version
  • Subscribe to this thread

Designed by CivilEA - Powered by MyBB

Linear Mode
Threaded Mode