scholarly journals DESIGN METHOD OF DAMPER CONNECTIONS BY POST-TENSIONED CONNECTION UTILIZING DUCTILE CAST IRON PLATE WITH SHEAR-KEY AND EXPERIMENTAL VERIFICATION OF RC FRAME WITH DAMPERS

2020 ◽  
Vol 85 (770) ◽  
pp. 563-573
Author(s):  
Yusuke MAIDA ◽  
Hiroyasu SAKATA ◽  
Kazushi SHIMAZAKI ◽  
Nobuyuki IZUMI ◽  
Hiroyuki TAKENAKA ◽  
...  
Keyword(s):  
Cast Iron ◽  
Experimental Verification ◽  
Design Method ◽  
Ductile Cast Iron ◽  
Rc Frame ◽  
Iron Plate ◽  
Shear Key ◽  
Post Tensioned

scholarly journals SHEAR STRENGTH EVALUATION OF POST-TENSIONED CONNECTION BETWEEN DUCTILE CAST IRON PLATE WITH SHEAR-KEY AND CONCRETE

2017 ◽  
Vol 82 (739) ◽  
pp. 1425-1435 ◽  
Author(s):  
Yusuke MAIDA ◽  
Kiyoka KINOSHITA ◽  
Hiroyasu SAKATA ◽  
Kazushi SHIMAZAKI ◽  
Nobuyuki IZUMI ◽  
...  
Keyword(s):  
Shear Strength ◽  
Cast Iron ◽  
Ductile Cast Iron ◽  
Strength Evaluation ◽  
Iron Plate ◽  
Shear Key ◽  
Post Tensioned

EXPERIMENT ON SHEAR OF POST-TENSIONED CONNECTION BETWEEN CONCRETE AND CAST IRON PLATE HAVING SHEAR-KEY

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Kiyoka Kinoshita ◽  
Yusuke Maida ◽  
Hiroyasu Sakata ◽  
Kazushi Shimazaki ◽  
Eiichiro Saeki ◽  
...  
Keyword(s):  
Cast Iron ◽  
Tensile Force ◽  
Frictional Resistance ◽  
Rc Beam ◽  
Iron Plate ◽  
Friction Resistance ◽  
Shear Key ◽  
Post Tensioned

In this paper, post-tensioned connection between concrete and cast iron plate having shear-key was adopted. Frictional resistance acts when there is no displacement between concrete and cast iron plate, shear-key also act to transmit stress to RC beam at the same time as the frictional resistance when the displacement occurs. Each specimen consists of RC beam and plate simulating post-tensioned connection. Ten specimens were tested. The parameter are type of plate, with or without the shear-key, the height of the shear-key, amount of the shear-key, difference between the post-tensioned force and whether or not applying vertical tensile force. In conclusion, it was needless to think their displacement by post-tensioned connection. And the strength of specimens with shear-key is presented by the sum of friction resistance and bearing resistance by using anamnestic formula.

Influence of casting skin on the fatigue lifetime of ferritic ductile cast iron

2017 ◽  
Vol 59 (1) ◽  
pp. 5-10 ◽  
Author(s):  
Birgit Rehmer ◽  
Birgit Skrotzki ◽  
Steffen Glaubitz
Keyword(s):  
Cast Iron ◽  
Ductile Cast Iron ◽  
Fatigue Lifetime ◽  
Casting Skin

Practitioner-friendly design method to improve the seismic performance of RC frame buildings

2021 ◽  
pp. 875529302098801
Author(s):  
Orlando Arroyo ◽  
Abbie Liel ◽  
Sergio Gutiérrez
Keyword(s):  
Seismic Performance ◽  
Design Method ◽  
Three Dimensional ◽  
Rc Frame ◽  
Structural System ◽  
Standard Code ◽  
Frame Buildings ◽  
Rc Frame Buildings ◽  
Mathematical Justification ◽  
Story Building

Reinforced concrete (RC) frame buildings are a widely used structural system around the world. These buildings are customarily designed through standard code-based procedures, which are well-suited to the workflow of design offices. However, these procedures typically do not aim for or achieve seismic performance higher than code minimum objectives. This article proposes a practical design method that improves the seismic performance of bare RC frame buildings, using only information available from elastic structural analysis conducted in standard code-based design. Four buildings were designed using the proposed method and the prescriptive approach of design codes, and their seismic performance is evaluated using three-dimensional nonlinear (fiber) models. The findings show that the seismic performance is improved with the proposed method, with reductions in the collapse fragility, higher deformation capacity, and greater overstrength. Furthermore, an economic analysis for a six-story building shows that these improvements come with only a 2% increase in the material bill, suggesting that the proposed method is compatible with current project budgets as well as design workflow. The authors also provide mathematical justification of the method.

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