A Predicting Method for Long-Term Behavior of Reinforced Concrete Moment Frames

2019 ◽  
Vol 116 (6) ◽  
Author(s):  
Mohammad Jalilzadeh Afshari ◽  
Ali Kheyroddin
Keyword(s):  
Reinforced Concrete ◽  
Moment Frames ◽  
Long Term Behavior

scholarly journals Simplified Time-Dependent Column Shortening Analysis in Special Reinforced Concrete Moment Frames

2017 ◽  
Vol 62 (1) ◽  
pp. 232-249 ◽  
Author(s):  
Mohammad Jalilzadeh Afshari ◽  
Ali Kheyroddin ◽  
Majid Gholhaki
Keyword(s):  
Reinforced Concrete ◽  
Frame Structures ◽  
Moment Frames ◽  
Moment Frame ◽  
High Rise ◽  
Geometrical Characteristics ◽  
Time Changes ◽  
The Moment ◽  
Long Term Behavior

Necessity for adaption of high-rise reinforced concrete structures’ design and practical steps of implementation through nonlinear staged analysis by consideration of long-term behavior of concrete have always been strongly recommended by researchers in recent years. Cumulative column shortening in conventional analyses is the most important consequence of neglecting the above issues. In this article, numerous modeling and extensive nonlinear staged analyses are carried out on structures with different geometrical characteristics and extremely simple empirical equations to estimate column shortening caused by creep, shrinkage and time changes of modulus of elasticity are provided in such a way that these relations can be independent of conventional parameters of ACI209R-92 regulations used in prediction of mentioned axial strains. Results obtained from validation of the proposed equations show high compliance of all proposed equations for up to 30 floors and also show accuracy of proposed shrinkage equation for the moment frame structures higher than the studied range.

scholarly journals Long-term behavior of cracked fiber reinforced concrete under service conditions

2019 ◽  
Vol 196 ◽  
pp. 649-658 ◽  
Author(s):  
D.H. Monetti ◽  
A. Llano-Torre ◽  
M.C. Torrijos ◽  
G. Giaccio ◽  
R. Zerbino ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Service Conditions ◽  
Long Term Behavior

Long-Term Deformations of Steel-Reinforced Concrete Columns under Sustained Axial Loads

2013 ◽  
Vol 351-352 ◽  
pp. 645-649
Author(s):  
Zhou Yi Chen ◽  
Yang Wang ◽  
Jian Qing Wu
Keyword(s):  
Reinforced Concrete ◽  
Axial Loading ◽  
Test Results ◽  
Axial Loads ◽  
Steel Reinforced Concrete ◽  
Dependent Behavior ◽  
Shrinkage And Creep ◽  
Long Term Behavior ◽  
Creep And Shrinkage

Steel-reinforced concrete (SRC) columns have been widely used over the past few decades. However, very limited research has been conducted on the time-dependent behavior of these columns caused by creep and shrinkage under sustained loading. This paper presents the results of an experimental study of the long-term behavior of short SRC columns under sustained axial loading. Long-term axial deformations due to shrinkage and creep of the concrete were recorded. In analysis of the test results, time analysis of the SRC columns under sustained axial loads using the age-adjusted effective modulus method was proven to be suitable by employing the ACI 209 model for prediction of shrinkage and the CEB-FIP90 model for the prediction of creep.

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