njit-etd2003-032 - New Jersey Institute of Technology

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LIST OF FIGURES Chapter Page 2.1 Control beam ZC4 21 2.2 Beam Z4-9O 21 2.3 Beam Z4-45 21 2.4 Beam Z4-Fab 22 2.5 Beam Z4-Mid 22 2.6 Control beam ZC6 22 2.7 Control beam ZC6(2) 23 2.8 Beam Z6-9O 23 2.9 Beam Z6-45 23 2.1O Beam Z6-Fab 24 2.22 Beam Z6-Mid 24 2.12 Failure of Beam ZC4 25 2.13 Failure of Beam Z4-9O 26 2.14 Failure of Beam Z4-45 27 2.15 Failure of Beam Z4-Mid 28 2.16 Failure of Beam Z4-Fab 29 2.17 Failure of Beam ZC6 3O 2.18 Failure of Beam ZC6(2) 3O 2.19 Failure of Beam Z6-45 31 2.2O Failure of Beam Z6-Mid 32 2.21 Failure of Beam Z6-Fab 33 ii
LIST OF FIGURES (Continued) Chapter Page 2.22 Failure of Beam Z6-9O 34 2.23 Comparison of load-deflection curves of 4-foot long beams 36 2.24 Comparison of moment-curvature curves of 4-foot long beams 36 2.25 Comparison of load-deflection curves of 6-foot long beams 4O 2.26 Comparison of moment-curvature curves of 6-foot long beams 41 3.1 Strain reduction factor R = efeleft in terms of pf Ef (GPa), based on all available test results 47 3.2 Strain reduction factor R = etc/eft in terms of pf Ef (GPa), only based on test results of FRP rupture 48 3.3 Strain reduction factor R = e fee ft, in terms of p f E f (GPa), only based on test results of FRP debonding 48 3.4 Strain reduction factor R = efeleft in terms of pf Ef I f:, only based on test results of FRP debonding 53 3.5 Comparison of the equations with and without the safety factor 54 3.6 FRP continuous fabric sheet in the form of U-jacket 59 3.7 FRP continuous fabric sheet bonded on two sides only 59 3.8 FRP continuous fabric sheet in the form of U-jacket with anchorage 6O 3.9 FRP strip in the form of U-jacket 61 3.1O FRP strip bonded on two sides of the beam 61 3.22 FRP strip in the form of U-jacket with anchorage 61 3.12 Concrete shear stress distribution beneath the epoxy 62 4.1 Re-bar cage 7O
Page 1 and 2: Copyright Warning & Restrictions Th
Page 3 and 4: ABSTRACT SHEAR STRENGTHENING OF RC
Page 5 and 6: SHEAR STRENGTHENING OF RC BEAMS USI
Page 7 and 8: APPROVAL PAGE SHEAR STRENGTHENING O
Page 9 and 10: This dissertation is dedicated to m
Page 11 and 12: TABLE OF CONTENTS Chapter Page 1 IN
Page 13 and 14: TABLE OF CONTENTS (Continued) Chapt
Page 15: LIST OF TABLES Chapter Page 2.1 Max
Page 19 and 20: LIST OF FIGURES (Continued) Chapter
Page 21 and 22: LIST OF FIGURES (Continued) Chapter
Page 23 and 24: 2 Additionally, special equipment i
Page 25 and 26: 4 5. To study the shear span to dep
Page 27 and 28: 6 1.4.1 Shear Strength of RC Beams
Page 29 and 30: Where A, is the area of shear reinf
Page 31 and 32: 10 usually be the same throughout t
Page 33 and 34: 12 1.4.2.2 Shear Strength of Contin
Page 35 and 36: 14 based on the assumption that the
Page 37 and 38: CHAPTER 2 EXPERIMENTAL PROGRAM ON S
Page 39 and 40: 18 needed, which was 4Omm wide and
Page 41: 20 used for bonding of the strips t
Page 45 and 46: 24 2.2 Instrumentation and Test Pro
Page 47 and 48: 26 b) Beam Z4-90 The next beam was
Page 49 and 50: 28 CFRP strip suddenly detached fro
Page 51 and 52: 30 Figure 2.17 Failure of Beam ZC6.
Page 53 and 54: 32 capacity. The load went straight
Page 55 and 56: 34 Figure 2.22 Failure of Beam Z6-9
Page 58 and 59: 37 c) Failure Mechanism Apparently,
Page 60 and 61: 39 observed by a prolonged portion
Page 63 and 64: 42 c) Failure Mechanism Since diffe
Page 65 and 66: 44 The equation to compute CARP she
Page 67 and 68:
46 3.2 Design Approach Based on Mod
Page 70:
49 Arom Aigure 3.2, it can be obser
Page 74 and 75:
53 Equation 3.12 from curve fitting
Page 76 and 77:
55 strength. The method based on bo
Page 78 and 79:
57 Chajes, M. J. et al. (1996) also
Page 80 and 81:
3) CFRP continuous fiber sheet in t
Page 82 and 83:
Figure 3.11 CARP strip in the form
Page 84 and 85:
63 Thus, a relationship between the
Page 86 and 87:
65 2 fc bi,d I f =wife • t f ' fi
Page 88 and 89:
67 Arom Table 3.4, it can also be o
Page 90 and 91:
69 equal to 3.75, the beam specimen
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71 laminates. The surfaces of the f
Page 94 and 95:
Figure 4.3 Configuration of CARP st
Page 96:
75 16 beams were tested in this res
Page 100 and 101:
79 Figure 4.7 Typical test setup. 4
Page 102 and 103:
81 intact. The CFRP strip delaminat
Page 104 and 105:
83 4.5.1.4 Beam Z11-S45. The CFRP s
Page 106 and 107:
85 4.5.2 Beam Group 2 4.5.2.1 Beam
Page 108 and 109:
87 4.5.2.3 Beam Z22-S90. This beam
Page 110 and 111:
89 (b) Right Side Figure 4.15 Failu
Page 112 and 113:
91 of the delamination, which consi
Page 114 and 115:
93 Figure 4.18 Failure of Beam Z31-
Page 116 and 117:
95 4.5.4 Beam Group 4 4.5.4.1 Beam
Page 118 and 119:
97 4.5.4.3 Beam Z42-FD. This was th
Page 120 and 121:
99 (a) Side View of the Beam at Fai
Page 122 and 123:
101 4.6 Test Results and Discussion
Page 124 and 125:
103 failure along the inclined crac
Page 126 and 127:
105
Page 128 and 129:
107 4.6.3 Beam Group 3 A summary of
Page 130 and 131:
109 4.6.3.3 Failure Mechanism. No i
Page 132 and 133:
111 ;how deflections at ultimate lo
Page 134 and 135:
113 All of the lines in Figure 4.28
Page 136 and 137:
115 ratio; line Z-F90 means the var
Page 138 and 139:
117 Unlike regular beams with large
Page 140 and 141:
119 orientation of the CFRP strips
Page 142 and 143:
121 As for shear design of deep bea
Page 144 and 145:
123 provisions of ACI Code (ACI 318
Page 146 and 147:
125 stress due to shear as well as
Page 148 and 149:
Figure 5.3 Distribution of transver
Page 150 and 151:
Figure 5.4 Estimation of effective
Page 152 and 153:
131 Where A and Ah are the areas of
Page 154 and 155:
Since the principal tensile stress
Page 156 and 157:
135 laminates can be obtained from
Page 158 and 159:
Table 5.1 Experimental and Computed
Page 160 and 161:
139 Where i denote each type of rei
Page 162 and 163:
141 the strongest beam in the 4-foo
Page 164 and 165:
143 Figure 6.1 Failure of Beam ZC4-
Page 166 and 167:
145 Figure 6.3 Failure of Beam Z22-
Page 168 and 169:
147 6.2.4 Analysis of Test Results
Page 170 and 171:
149 improves the performance of the
Page 172 and 173:
Figure 6.7 Test result of beam Z22-
Page 174 and 175:
Figure 6.8 Test result of Beam Z3I-
Page 176 and 177:
155 equal to 69 degrees in this cas
Page 178 and 179:
157 decreases, while the shear cont
Page 180 and 181:
APPENDIX A LOAD DEFLECTION CURVES O
Page 182 and 183:
161 Figure A.3 Load deflection curv
Page 184 and 185:
163 Figure A.7 Load deflection curv
Page 186 and 187:
Figure A.11 Load deflection curve o
Page 188 and 189:
167 Figure B.1 Load deflection curv
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
173 Figure B.13 Load deflection cur
Page 196 and 197:
APPENDIX C LOAD DEFLECTION CURVES O
Page 198 and 199:
177 Figure C.3 Load deflection curv
Page 200 and 201:
179 Czaderski, Christoph. "Shear St
Page 202:
181 4, No. 4, Nov. 2000, pp. 198-20
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