scholarly journals Elastic-plastic Earthquake Response Analytical Method and Its Simulation Analyses : Elastic-plastic analysis of reinforced concrete frame in cosideration of fluctuation of axial forces on columns (PART III)

1989 ◽  
Vol 405 (0) ◽  
pp. 63-72
Author(s):  
Yutaka Isozaki ◽  
Eiji Fukuzawa ◽  
Kouji Fujisaki
Keyword(s):  
Reinforced Concrete ◽  
Analytical Method ◽  
Earthquake Response ◽  
Reinforced Concrete Frame ◽  
Elastic Plastic ◽  
Concrete Frame ◽  
Axial Forces ◽  
Plastic Analysis

Experimental Investigation and Crack Resistance Analysis on Large Scale Prestressed Steel Reinforced Concrete Frame

2011 ◽  
Vol 255-260 ◽  
pp. 524-528
Author(s):  
Xue Yu Xiong ◽  
Feng Gao ◽  
Yang Li
Keyword(s):  
Reinforced Concrete ◽  
Large Scale ◽  
Concrete Structures ◽  
Engineering Application ◽  
Concrete Frames ◽  
Reinforced Concrete Frame ◽  
Static Test ◽  
Concrete Frame ◽  
Concrete Members ◽  
Axial Forces

Based on the static test of large-scaled prestressed steel concrete frames, the behavior of crack were tested and investigated. In this paper, according to theory of reinforced concrete members, Code for design of concrete structures(GB 50010-2002)and code ACI 318—05, the formulas of cracking moment considering secondary axial forces were deduced and verified by test results. Conclusion can be drawn as follow: the calculation errors of formulas derive from theory of reinforced concrete members is small, generally less than 6%; the errors of formulas referring to Code for design of concrete structures(GB 50010-2002)is about 10%, which is satisfy the needs of engineering and simply to be calculated; Cracking moment calculated by formulas referring to code ACI 318—05 is less than test result, it is unsafe for engineering application.

scholarly journals Shear Behavior of a Reinforced Concrete Frame Retrofitted with a Hinged Steel Damping System

2020 ◽  
Vol 12 (24) ◽  
pp. 10360
Author(s):  
Hyun-Do Yun ◽  
Sun-Woong Kim ◽  
Wan-Shin Park ◽  
Sun-Woo Kim
Keyword(s):  
Reinforced Concrete ◽  
Shear Behavior ◽  
Seismic Retrofitting ◽  
Reinforced Concrete Frame ◽  
Main Research ◽  
Torsion Spring ◽  
Concrete Frame ◽  
Energy Dissipation Capacity ◽  
Research Questions ◽  
Torsion Springs

The purpose of this study was to experimentally evaluate the effect of a hinged steel damping system on the shear behavior of a nonductile reinforced concrete frame with an opening. For the experimental test, a total of three full-scale reinforced concrete frame specimens were planned, based on the “no retrofitting” (NR) specimens with non-seismic details. The main research questions were whether the hinged steel damping system is reinforced and whether torsion springs are installed in the hinged steel damping system. From the results of the experiment, the hinged steel damping system (DR specimen) was found to be effective in seismic retrofitting, while isolating the opening of the reinforced concrete (RC) frame, and the torsion spring installed at the hinged connection (DSR specimen) was evaluated to be effective in controlling the amount of deformation of the upper and lower dampers. The strength, stiffness, and energy dissipation capacity of the DSR specimen were slightly improved compared to the DR specimen, and it was confirmed that stress redistribution was induced by the rotational stiffness of the torsion spring installed in the hinge connection between the upper and lower frames.

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