mechanical performance and design of blind-bolted tubular
TRANSCRIPT
Mechanical performance and design of
blind-bolted tubular connections
Dr. Fei Xu
Dr. Tak-Ming Chan
Department of Civil and Environmental Engineering
The Hong Kong Polytechnic University
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2
1. Introduction
▪ Component-Based and Full-Scale Connection Investigation
3
1. Introduction
Component-based
investigation
Full-scale
investigation
▪ Research Framework
4
▪ Pull-out Behaviour of Modified Bolt in Conf. Concrete: Undergoing
2. Single-Bolt Connection
Specimens
Octagonal hollow
section /mmBolt /mm Con.
GradeB T D0 L Db Lem
D/T
OCT75-3-M16-L60-C30 75 3 181 380 16 60 C30
OCT75-4-M16-L60-C30 # 75 4 181 380 16 60 C30
OCT75-6-M16-L60-C30 75 6 181 380 16 60 C30
Embedded
length
OCT75-4-M16-L0-C30 75 4 181 380 16 0 C30
OCT75-4-M16-L24-C30 75 4 181 380 16 24 C30
OCT75-4-M16-L48-C30 75 4 181 380 16 48 C30
OCT75-4-M16-L75-C30 75 4 181 380 16 75 C30
Bolt size
OCT75-4-M12-L60-C30 75 4 181 380 12 60 C30
OCT75-4-M12-L45-C30 75 4 181 380 12 45 C30
OCT75-4-M20-L75-C30 75 4 181 380 20 75 C30
OCT75-4-M20-L48-C30 75 4 181 380 20 48 C30
concrete
OCT75-4-M16-L60-C20 75 4 181 380 16 60 C20
OCT75-4-M16-L60-C50 75 4 181 380 16 60 C50
OCT75-4-M12-L45-C20 75 4 181 380 12 45 C20
OCT75-4-M12-L45-C50 75 4 181 380 12 45 C50
OCT75-4-M16-L0-C0* 75 4 181 380 16 0 N/A
Extended
blind bolt
5
▪ Hollow Octagonal Connection: Experimental Investigation
3. Multi-Bolt Connection
Test SpecimensOctagonal hollow section (mm) End plate (mm) Bolt (mm)
B T D0 L Tp G d dh
OCT150-T4-M16 150 4 362 1600 25 90 16 22
OCT150-T6-M16 150 6 362 1600 25 90 16 22
OCT150-T8-M16 150 8 362 1600 25 90 16 22
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▪ Octagonal Tube-wall Deformation: Experimental Investigation
3. Multi-Bolt Connection
Pre-Tight Test
Blind Blot
Fixed Platform
Measuring Strain
for consecutive 168 hours (7 days)
Bolt Strain Gauge
c. Strain gauge
d. Pre-drilled boltb. Adhesive
a. Syringe
1. Mixing Adhesive
2. Preliminary Heating Mixed b and d
3. Pouring Mixed b into Bolt Hole
4. Inserting Gauge
5. Hot Curing
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3. Multi-Bolt Connection
▪ Octagonal Tube-wall Deformation: Experimental Results
OCT150-T6-M16
Undeformed OCT150-T4-M16
OCT150-T8-M16
3%B
Shear
Fracture
8
▪ Bolt-Group & Inclined-Angel Effects of Embd. Bolts: Undergoing
3. Multi-Bolt Connection
Specimens
Octagonal Hollow
Section
/mm
Bolt
/mmCon
.
Gra
de
No. of
Bolts
B T D0 L Db Lem
D/t
OCT150-4-M16-L100-C30-T1 150 4 362 850 16 100 C30
Two
OCT150-6-M16-L100-C30-T1# 150 6 362 850 16 100 C30
OCT150-8-M16-L100-C30-T1 150 8 362 850 16 100 C30
Embd.
Length
OCT150-6-M16-L50-C30-T1 150 6 362 850 16 50 C30
OCT150-6-M16-L130-C30-T1 150 6 362 850 16 130 C30
Con.
Grade
OCT150-6-M16-L0-C0-T1* 150 6 362 850 16 0 0
OCT150-6-M16-L100-C20-T1 150 6 362 850 16 100 C20
OCT150-6-M16-L100-C50-T1 150 6 362 850 16 100 C50
Group
Effects
OCT150-6-M16-L100-C30-F1 150 6 362 950 16 100 C30Four
OCT150-6-M16-L50-C30-F1 150 6 362 950 16 50 C30
Bolt
Dia.
OCT150-6-M12-L100-C30-T1 150 6 362 850 12 100 C30
TwoOCT150-6-M20-L100-C30-T1 150 6 362 850 20 100 C30
Angle OCT150-6-M16-L50-C30-T2 150 6 362 850 16 50 C30
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▪ Tube-Wall Deformation & Split Washer Fracture
4. Finite Element Analysis
V.S