njit-etd2003-032 - New Jersey Institute of Technology

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BIOGRAPHICAL SKETCH Author: Zhichao Zhang Degree: Doctor of Philosophy Date: January 2OO3 Undergraduate and Graduate Education: • Doctor of Philosophy in Civil Engineering New Jersey Institute of Technology, New Jersey, 2OO3 • Master of Science in Civil Engineering Southwest Jiaotong University, Chengdu, Sichuan, China, 1998 • Bachelor of Science in Civil Engineering Shijiazhuang Railway Institute, Shijiazhuang, Hebei, China, 1995 Major: Civil Engineering Presentations and Publications: Zhichao Zhang, and Cheng-Tzu Thomas Hsu, "Shear Strengthening of RC Beams Using Carbon Fiber Reinforced Polymer Strips", Proceedings of 15 th ASCE Engineering Mechanics Conference, Columbia University, New York City, N. Y., June 2-5, 2OO2. Zhichao Zhang, and Cheng-Tzu Thomas Hsu, "Shear behavior of Reinforced Concrete Beams Strengthened by Sika's CFRP Laminates", A final report submitted to Sika Corp., N. J., Technical Report Structural Series No. 2OOO-1, Department of Civil & Environmental Engineering, NJIT, Newark, N. J., December 2OOO, 41 pages. iv
This dissertation is dedicated to my parents. v
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: APPROVAL PAGE SHEAR STRENGTHENING O
Page 11 and 12: TABLE OF CONTENTS Chapter Page 1 IN
Page 13 and 14: TABLE OF CONTENTS (Continued) Chapt
Page 15 and 16: LIST OF TABLES Chapter Page 2.1 Max
Page 17 and 18: 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
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37 c) Failure Mechanism Apparently,
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39 observed by a prolonged portion
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42 c) Failure Mechanism Since diffe
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44 The equation to compute CARP she
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46 3.2 Design Approach Based on Mod
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49 Arom Aigure 3.2, it can be obser
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53 Equation 3.12 from curve fitting
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55 strength. The method based on bo
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57 Chajes, M. J. et al. (1996) also
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3) CFRP continuous fiber sheet in t
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Figure 3.11 CARP strip in the form
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63 Thus, a relationship between the
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65 2 fc bi,d I f =wife • t f ' fi
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67 Arom Table 3.4, it can also be o
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69 equal to 3.75, the beam specimen
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71 laminates. The surfaces of the f
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Figure 4.3 Configuration of CARP st
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75 16 beams were tested in this res
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79 Figure 4.7 Typical test setup. 4
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81 intact. The CFRP strip delaminat
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83 4.5.1.4 Beam Z11-S45. The CFRP s
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85 4.5.2 Beam Group 2 4.5.2.1 Beam
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87 4.5.2.3 Beam Z22-S90. This beam
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89 (b) Right Side Figure 4.15 Failu
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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
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101 4.6 Test Results and Discussion
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103 failure along the inclined crac
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105
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107 4.6.3 Beam Group 3 A summary of
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109 4.6.3.3 Failure Mechanism. No i
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111 ;how deflections at ultimate lo
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113 All of the lines in Figure 4.28
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115 ratio; line Z-F90 means the var
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117 Unlike regular beams with large
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119 orientation of the CFRP strips
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121 As for shear design of deep bea
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123 provisions of ACI Code (ACI 318
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125 stress due to shear as well as
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Figure 5.3 Distribution of transver
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Figure 5.4 Estimation of effective
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131 Where A and Ah are the areas of
Page 154 and 155:
Since the principal tensile stress
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135 laminates can be obtained from
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Table 5.1 Experimental and Computed
Page 160 and 161:
139 Where i denote each type of rei
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141 the strongest beam in the 4-foo
Page 164 and 165:
143 Figure 6.1 Failure of Beam ZC4-
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145 Figure 6.3 Failure of Beam Z22-
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147 6.2.4 Analysis of Test Results
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149 improves the performance of the
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Figure 6.7 Test result of beam Z22-
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Figure 6.8 Test result of Beam Z3I-
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155 equal to 69 degrees in this cas
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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
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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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