第五章 結論與建議
5.2 建議
1. 試驗結果顯示SRC試體於達到其極限扭矩強度時，H型鋼骨尚未 降伏，其扭矩強度遠小於鋼骨全斷面塑性扭矩強度；H 型鋼於扭 矩強度之貢獻相對於 RC 甚小，於設計上可保守的忽略 H 型鋼的 扭矩強度。
2. SRC試體之橫向扭力筋為雙排#3 @10 cm無法發揮規範計算之扭 矩強度，值得後續之研究以確保極限扭矩強度計算式之準確性。
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34
表3.1 試體編號
Specimen Steel Transverse
reinforcement
Longitudinal reinforcement S1-RCt1l1 H 250×140×9×14 #3@15 cm 6-#4 S1-RCt2l1 H 250×140×9×14 #3@10 cm 8-#4 S1-RCt3l1 H 250×140×9×14 2-#3@10 cm 10-#5 S1-RCt1l2 H 250×140×9×14 #3@15 cm 6-#5 S1-RCt2l2 H 250×140×9×14 #3@10 cm 8-#5 S1-RCt3l2 H 250×140×9×14 2-#3@10 cm 10-#6 S2-RCt1l1 H 450×140×9×14 #3@15 cm 6-#4 S2-RCt2l1 H 450×140×9×14 #3@10 cm 8-#4 S2-RCt3l1 H 450×140×9×14 2-#3@10 cm 10-#5 S2-RCt1l2 H 450×140×9×14 #3@15 cm 6-#5 S2-RCt2l2 H 450×140×9×14 #3@10 cm 8-#5 S2-RCt3l2 H 450×140×9×14 2-#3@10 cm 10-#6
RCt2l1 － #3@10 cm 8-#4
RCt2l2 － #3@10 cm 8-#5
S1 H 250×140×9×14 － －
S2 H 450×140×9×14 － －
35
表3.2 以標稱強度計算之試體扭矩強度
specimen
RC Steel ACI
318-05
ACI 318-89
ACI 318-05
Hsu
表3.3 鋼骨與鋼筋材料性質試驗結果
S1-RCt1l1 28.73 S1-RCt2l1 30.69
S1-RCt3l1 30.11 S1-RCt1l2 27.75 S1-RCt2l2 30.69
S1-RCt3l2 30.11 S2-RCt1l1 26.48 S2-RCt2l1 30.20
S2-RCt3l1 30.69 S2-RCt1l2 27.26 S2-RCt2l2 29.13
S2-RCt3l2 28.24 RCt2l1 31.19
RCt2l2 25.60
37
38
表4.3 扭矩強度規範計算值與實驗值之比較 Specimen fc'
Superposition of RC and steel Tu(test) / Tn(calc) Test Tn(calc) Tu(test)RC RC RC Steel ACI 318-89ACI 318-95 Hsu ACI 318-89ACI 318-95Hsu (MPa) (kN-m) (kN-m) (kN-m) (kN-m) (kN-m) S1-RCt1l1 28.73 64.99 52.72 39.00 40.36 1.67 1.19 1.60 1.55 S1-RCt2l1 30.69 68.17 67.80 58.50 57.79 1.57 0.98 1.13 1.15 S1-RCt3l1 30.11 91.18 110.34 117.00 134.88 1.45 0.82 0.77 0.67 S1-RCt1l2 27.75 56.61 52.31 39.00 57.70 1.26 1.06 1.41 0.96 S1-RCt2l2 30.69 82.34 67.80 58.50 82.72 1.36 1.19 1.38 0.98 S1-RCt3l2 30.11 93.04 110.34 117.00 161.72 1.15 0.83 0.79 0.57 S2-RCt1l1 26.48 55.48 51.75 39.00 40.50 1.34 1.04 1.38 1.33 S2-RCt2l1 30.20 68.37 67.60 58.50 57.84 1.58 0.99 1.14 1.15 S2-RCt3l1 30.69 77.38 110.58 117.00 134.63 1.98 0.69 0.65 0.57 S2-RCt1l2 27.26 66.80 52.09 39.00 57.76 1.56 1.24 1.65 1.13 S2-RCt2l2 29.13 72.49 67.15 58.50 83.05 1.83 1.05 1.20 0.85 S2-RCt3l2 28.24 72.75 109.56 117.00 163.05 2.14 0.65 0.61 0.44 RCt2l1 31.19 65.04 68.00 58.50 57.75 － 0.96 1.11 1.13 RCt2l2 25.60 69.83 65.62 58.50 83.91 － 1.06 1.19 0.83 39
圖 2.1 斜彎理論(Wang and Salmon, 1992)
圖 2.2 (a)薄壁管; (b)剪力流徑所包圍之面積(ACI 318-95)
40
圖2.3 空間桁架分析(ACI 318-95)
40 mm (淨保護層)
350 mm
550 mm
圖 3.1 試體圖
41
S1-RCt1系列試體 S1-RCt2系列試體 S1-RCt3系列試體
S2-RCt1系列試體 S2-RCt2系列試體 S2-RCt3系列試體 圖3.2 試體斷面圖
42
扭矩施力端 扭轉束制端 試體
荷重元
加載
強力地板
圖3.3 試驗設置圖
43
加載
荷重元
夾具
扭轉束制端 強力地板
滾支承 圓弧形支承座 鋼棒
扭矩施力端 強力地板
滾支承
圓弧形支承座
強力地板
圖3.4 試驗設置細部圖
44
上夾具
試體
下夾具
單位：mm 圖3.5 圓弧形支承座圖
45
圖3.6 試體t1系列橫向與縱向鋼筋應變計配置圖
46
圖3.7 試體t2系列橫向與縱向鋼筋應變計配置圖
47
圖3.8 試體t3系列橫向與縱向鋼筋應變計配置圖
48
圖3.9 S1系列試體鋼骨應變計配置圖
49
圖3.10 S2系列試體鋼骨應變計配置圖
50
位移計(π Gauge)
角度計(Tiltmeter)
圖 3.11 變位量測裝置配置圖
Angle of twist per unit length
Torque
A B
C
D
圖 4.1 SRC試體扭矩-扭轉角示意圖
51
圖 4.2 SRC系列試體裂縫生成次序示意圖
52
Angle of twist per unit length
Torque
A B
C
D
圖4.3 RC試體扭矩-扭轉角示意圖
圖4.4 RC系列試體裂縫生成次序示意圖
53
0 0.02 0.04 0.06 0
Angle of twist per unit length (rad/m) .08
0 20 40 60 80 100
Torque (kN-m)
圖 4.5 試體S1-RCt1l1扭矩與扭轉角關係圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
圖 4.6 試體S1-RCt2l1扭矩與扭轉角關係圖
54
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
圖 4.7 試體S1-RCt3l1扭矩與扭轉角關係圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
圖 4.8 試體S1-RCt1l2扭矩與扭轉角關係圖
55
0 0.02 0.04 0.06 0
Angle of twist per unit length (rad/m) .08
0 20 40 60 80 100
Torque (kN-m)
圖 4.9 試體S1-RCt2l2扭矩與扭轉角關係圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
圖 4.10 試體S1-RCt3l2扭矩與扭轉角關係圖
56
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
圖 4.11 試體S2-RCt1l1扭矩與扭轉角關係圖
0 0.02 0.04 0.06 0
Angle of twist per unit length (rad/m) .08
0 20 40 60 80 100
Torque (kN-m)
圖 4.12 試體S2-RCt2l1扭矩與扭轉角關係圖
57
0 0.02 0.04 0.06 0
Angle of twist per unit length (rad/m) .08
0 20 40 60 80 100
Torque (kN-m)
圖 4.13 試體S2-RCt3l1扭矩與扭轉角關係圖
0 0.02 0.04 0.06 0
Angle of twist per unit length (rad/m) .08
0 20 40 60 80 100
Torque (kN-m)
圖 4.14 試體S2-RCt1l2扭矩與扭轉角關係圖
58
0 0.02 0.04 0.06 0
Angle of twist per unit length (rad/m) .08
0 20 40 60 80 100
Torque (kN-m)
圖 4.15 試體S2-RCt2l2扭矩與扭轉角關係圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
圖 4.16 試體S2-RCt3l2扭矩與扭轉角關係圖
59
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
圖4.17 試體RCt2l1扭矩與扭轉角關係圖
0 0.02 0.04 0.06 0
Angle of twist per unit length (rad/m) .08
0 20 40 60 80 100
Torque (kN-m)
圖4.18 試體 RCt2l2扭矩與扭轉角關係圖
60
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 1 2 3 4 5
Torque (kN-m)
S1 S2
圖 4.19 S1與S2 之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt1l1 S1-RCt1l2
圖 4.20 試體編號S1-RCt1系列之扭矩-扭轉角比較圖
61
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt2l1 S1-RCt2l2
圖 4.21 試體編號S1-RCt2系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt3l1 S1-RCt3l2
圖 4.22 試體編號S1-RCt3系列之扭矩-扭轉角比較圖
62
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S2-RCt1l1 S2-RCt1l2
圖 4.23 試體編號S2-RCt1系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S2-RCt2l1 S2-RCt2l2
圖 4.24 試體編號S2-RCt2系列之扭矩-扭轉角比較圖
63
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S2-RCt3l1 S2-RCt3l2
圖 4.25 試體編號S2-RCt3系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
RCt2l1 RCt2l2
圖4.26 試體編號RCt2系列之扭矩-扭轉角比較圖
64
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0
Torque (kN-m)
S1-RCt1l1 S1-RCt2l1 S1-RCt3l1
圖4.27 試體編號S1-RCl1系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0
Torque (kN-m)
S1-RCt1l2 S1-RCt2l2 S1-RCt3l2
圖4.28 試體編號S1-RCl2系列之扭矩-扭轉角比較圖
65
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0
Torque (kN-m)
S2-RCt1l1 S2-RCt2l1 S2-RCt3l1
圖4.29 試體編號S2-RCl1系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0
Torque (kN-m)
S2-RCt1l2 S2-RCt2l2 S2-RCt3l2
圖4.30 試體編號S2-RCl2系列之扭矩-扭轉角比較圖
66
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt1l1 S2-RCt1l1
圖 4.31 試體編號RCt1l1系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt2l1 S2-RCt2l1 RCt2l1
圖 4.32 試體編號RCt2l1系列之扭矩-扭轉角比較圖
67
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt3l1 S2-RCt3l1
圖 4.33 試體編號RCt3l1系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt1l2 S2-RCt1l2
圖 4.34 試體編號RCt1l2系列之扭矩-扭轉角比較圖
68
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt2l2 S2-RCt2l2 RCt2l2
圖 4.35 試體編號RCt2l2系列之扭矩-扭轉角比較圖
0 0.02 0.04 0.06 0.08
Angle of twist per unit length (rad/m)
0 20 40 60 80 100
Torque (kN-m)
S1-RCt3l2 S2-RCt3l2
圖 4.36 試體編號RCt3l2系列之扭矩-扭轉角比較圖
69