Transcript Document

A Study on the 3-Point Bending Test and Mechanical
Behavior of the Hybrid FRP Beam
1
Yeou-Fong Li and Tai-Cheng Chen
1
Professor of the Department of Civil Engineering , NTUT, Taipei, Taiwan .
2
Master of the Department of Civil Engineering, NTUT, Taipei, Taiwan.
Abstract : Reinforced Concrete (RC) shear wall in structure system can provide lateral stiffness and be applied to the
structural reinforcement project. The main factors to affect the mechanical behavior of the RC shear wall include the
steel ratio, the ratio of height to width, and the wall thickness. Therefore, the study is to evaluate the past literature
and the nonlinear pushover analysis of RC shear wall by the Finite Element Method of ANSYS software. The
specimens include three types of RC shear wall (in high, medium and low mode), framed shear walls with opening.
By changing the steel ratio, the ratio of height to width and the wall thickness, the nonlinear pushover analysis is
conducted for evaluation. After reviewing the analysis and comparing the results with the past literature, the trends
of the force-displacement curve and the crack distribution in the wall are similar to the experimental results.
Keywords：Finite Element Method, Shear Walls, Crack Distribution
Boundary Conditions of Shear Wall Analysis
500
20
400
Stress (MPa)
15
10
300
200
100
5
Steel Bar Stress-Strain Relationship
Input
Concrete Stress-Strain Relationship
Input
0
0
0
0.001
0.002
Strain
0.003
Concrete
0.004
0
0.005
0.01
0.015
0.02
0.025
Strain
Steel
Cracking Distribution and Evolution
Displacement 0.4 mm
Force-Displacement Relationship of Change
The Ratio of Vertical Reinforcement
Displacement 0.4 mm
400
0
Drift Ratio (%)
1
1.5
0.5
2
2.5
300
Force (kN)
Stress (MPa)
Constitutive Law of Concrete and Steel
25
Displacement 4 mm
Displacement 4 mm
200
HWFLV1
HWFLV2 (HWFL1)
HWFLV3
HWFLV4
100
0
0
20
40
Displacement (mm)
60
80
Conclusions
1.
Displacement 66 mm
Displacement 66 mm
2.
3.
4.
The increase of the steel ratio of RC shear wall
leads to the increase of the wall strength as well
as the cracks distribution scope.
The increase of the thickness of RC shear wall
leads to the slight increase of the wall strength,
but the decrease of the cracks distribution scope.
The increase of the ratio of height to width of RC
shear wall causes the decrease of the wall
strength.
To increase the thickness of RC shear wall with
opening will lead to the increase of the wall
strength, but no effect on the cracks distribution.