scholarly journals Hysteretic restoring force characteristics of unbounded prestressed concrete framed structure under earthquake load

1989 ◽  
Vol 22 (2) ◽  
pp. 112-121
Author(s):  
M. Nishiyama ◽  
H. Mugurama ◽  
F. Watanabe
Keyword(s):  
Prestressed Concrete ◽  
Analytical Method ◽  
Concrete Beam ◽  
Concrete Columns ◽  
Restoring Force ◽  
Bond Slip ◽  
Earthquake Load ◽  
Reversed Cyclic ◽  
Force Characteristics ◽  
Good Agreement

An analytical method, by which hysteretic restoring force characteristics of unbonded prestressed concrete framed structure can be statically pursued on the basis of material properties, is presented. The bond-slip relationship between concrete and prestressing tendon is taken into account, and thus the method covers unbonded members and bonded members. For verifying the propriety of the analytical method, the experiment is carried out on a portal frame with an unbonded prestressed concrete beam of 4.2 m in length and reinforced concrete columns of 1 m in height. High intensity reversed cyclic lateral loading is applied. The experimental results show a good agreement with the analytical ones in terms of load-deflection relation and the fluctuation of the tendon stress at anchorage end.

Experiment and Numerical Simulation on Non-Magnetic Prestressed Beam

2017 ◽  
Vol 894 ◽  
pp. 1-9
Author(s):  
Shi Yong Jiang ◽  
Wei Fei ◽  
Wei Lai Yao ◽  
Xue Yang Li
Keyword(s):  
Numerical Simulation ◽  
Prestressed Concrete ◽  
Concrete Beam ◽  
Ultimate Load ◽  
Analysis Software ◽  
Pure Bending ◽  
Element Analysis ◽  
Prestressed Beam ◽  
Good Agreement ◽  
Section Form

In order to meet demanding of non-magnetic, changing the reinforcement ratio, the degree of prestress and cross section form, four partially prestressed concrete beam (3 T shape section, 1 rectangle section) were made with CFRP as longitudinal reinforcement and stirrup. The results show that: the pure bending sections of the test beams conform the plane-section assumption; the beams with bigger rate of reinforcement or with stronger prestress tends to appear more cracks with smaller spacing and width, also their cracking load were higher with relatively lesser deflection. The cracking load and ultimate load of T-shape beam are slightly larger than the rectangular beam’s, but their deflections are similar nearly. Based on experimental research, nonlinear finite element analysis software ANSYS was utilized to establish the model, the results of numerical simulation and experiments showed good agreement.

scholarly journals STUDY ON RESTORING FORCE CHARACTERISTICS MODEL FOR PRESTRESSED CONCRETE FRAMES

2000 ◽  
Vol 65 (530) ◽  
pp. 139-145
Author(s):  
Masayuki HAMAHARA ◽  
Masahiro NAKAMURA ◽  
Seijiro IIDA ◽  
Tsuyoshi FUKUI
Keyword(s):  
Prestressed Concrete ◽  
Concrete Frames ◽  
Restoring Force ◽  
Force Characteristics

Study on Bond-Slip Behavior of the Channel Steel Connectors at the End of Novel Prefabricated Prestressed Concrete Beams

2013 ◽  
Vol 353-356 ◽  
pp. 3593-3597
Author(s):  
Jiang Chuan Wu ◽  
Ji Wen Zhang ◽  
Dong Yang
Keyword(s):  
Finite Element ◽  
Prestressed Concrete ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Bond Slip ◽  
Shear Connectors ◽  
Finite Element Software ◽  
Prestressed Concrete Beam ◽  
Loading Effects ◽  
Stress States

The channel steel connectors of novel prefabricated prestressed concrete beam play an extremely important role in structures. They act as the connectors of prefabricated beams and columns and support the prefabricated beams temporarily at construction stage, work as shear connectors of the adjoining faces between the old and new concrete at using stage. But they are easy to be bond slip failure for its complicated stress states. To analyze their mechanical behavior and failure mode, the interaction between concrete and channel steels is considered by adopting the spring unit and nonlinear analysis with finite element software ANSYS. The results indicate that the channel steel connectors of novel prefabricated prestressed concrete beam are effective in bearing various loading effects and meet the requirements of prefabricated structures.

scholarly journals RESTORING FORCE CHARACTERISTICS MODEL OF PRESTRESSED CONCRETE BEAMS IN BEAM-COLUMN ASSEMBLIES

2004 ◽  
Vol 69 (575) ◽  
pp. 105-112 ◽  
Author(s):  
Ryuichiro UCHIDA ◽  
Masayuki HAMAHARA ◽  
Hiromitsu SUETSUGU ◽  
Nobuo SATO ◽  
Koreyoshi OSAKI
Keyword(s):  
Prestressed Concrete ◽  
Concrete Beams ◽  
Restoring Force ◽  
Force Characteristics
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