Pull-Out and Shear Tests of Long Glass FRP Connector for Sandwich-Insulation Wall Panels

2021 ◽  
Vol 25 (5) ◽  
pp. 04021047
Author(s):  
Zhi-zhou He ◽  
Peng Pan ◽  
You-ming Guo ◽  
Ying-ri Cao ◽  
Shao-dong Shen ◽  
...  
Keyword(s):  
Shear Tests ◽  
Pull Out ◽  
Wall Panels ◽  
Insulation Wall ◽  
Glass Frp

Improvement of glued-in-rod joint system using compressed wooden dowel

Holzforschung ◽  
2010 ◽  
Vol 64 (6) ◽  
Author(s):  
Kiho Jung ◽  
Satoru Murakami ◽  
Akihisa Kitamori ◽  
Wen-Shao Chang ◽  
Kohei Komatsu
Keyword(s):  
High Performance ◽  
Base Material ◽  
Shear Tests ◽  
Joint System ◽  
Bonding Performance ◽  
Pull Out ◽  
Wooden Dowel ◽  
Application Potential ◽  
Compressed Wood ◽  
Insertion Length

Abstract The purpose of this study was to develop eco-friendly and high-performance glued-in-rod (GIR) joints using compressed wood (CW), which has higher tensile strength than normal hardwood, instead of conventional wooden dowels. To explore the bonding performance of the dowel and base material, punching shear tests were performed and relationships were established between the density of CW dowel and punching characteristics. Pull-out tests of GIR joints were performed and results were compared with those derived from a mechanical model to evaluate the influence of insertion length of dowel and to define its optimized length. The results indicate that CW dowel has almost the same bonding performance in the density range 330–1000 kg m-3. Hence, CW as a dowel material in GIR joints has a high application potential. Pull-out tests of GIR joints showed that the insertion length of dowel in GIR joints with the CW-67 dowel is the best if the length is 10 times larger than its diameter. In addition to its satisfactory bonding performance, CW dowels have excellent tensile characteristics.

scholarly journals Wind Fragility for Sign Structure in Korea with Chemical Anchor Connection

2018 ◽  
Vol 186 ◽  
pp. 02008 ◽  
Author(s):  
Viriyavudh Sim ◽  
SeongDo Kim ◽  
WooYoung Jung
Keyword(s):  
Simulation Method ◽  
Failure Criteria ◽  
Dominant Factor ◽  
Strong Wind ◽  
Shear Tests ◽  
Pull Out ◽  
Typical Sign ◽  
Concrete Building ◽  
Sign Structure ◽  
Strong Winds

Damage to domestic facilities by strong winds and typhoon is on the rise in recent year. Typical sign structure used in Korea is found on the edge of concrete building, which could be easily affected by strong winds. Therefore, this study focused on sign structure among various vulnerable facilities. The evaluation of wind fragility for sign structure was carried out considering the failure of anchor at their connection to the concrete building. Moreover, pull-out and shear tests were performed to determine the resistance capacity of anchor used in this study. Monte Carlo Simulation method was used to generate random wind loads on sign structure. Additionally, fragility parameters were determined based on the failure criteria of connection anchor. Results show that diameter of the installed anchor was the dominant factor affecting the performance of sign structure subjected to strong wind.

scholarly journals Test and analysis on axial performances of GFRP restraint connectors for sandwich insulation wall panels

2021 ◽  
pp. 103457
Author(s):  
Zhi-Zhou He ◽  
Peng Pan ◽  
Gen-Qi Xiao ◽  
Shao-Dong Shen ◽  
Jun-Yu Ren
Keyword(s):  
Wall Panels ◽  
Insulation Wall

Shear Tests on Subassemblies Representing the Multi-anchored Connection between PC Wall Panels and RC Frames

2018 ◽  
Vol 22 (12) ◽  
pp. 5164-5177 ◽  
Author(s):  
Guk Won Son ◽  
Soo Kyoung Ha ◽  
Geun Taeck Song ◽  
Sung Yong Yu
Keyword(s):  
Shear Tests ◽  
Rc Frames ◽  
Wall Panels

The influence of heat treatment on the fiber/matrix interface in a SiC-reinforced glassceramic

1988 ◽  
Vol 46 ◽  
pp. 742-743
Author(s):  
E. Bischoff ◽  
O. Sbaizero
Keyword(s):  
Heat Treatment ◽  
Aluminum Silicate ◽  
Lithium Aluminum ◽  
Interfacial Region ◽  
Specimen Preparation ◽  
Crack Wake ◽  
Pull Out ◽  
Annealed Material ◽  
Ultrasonic Drilling ◽  
Fiber Matrix Interface

Fiber or whisker reinforced ceramics show improved toughness and strength. Bridging by intact fibers in the crack wake and fiber pull-out after failure contribute to the additional toughness. These processes are strongly influenced by the sliding and debonding resistance of the interfacial region. The present study examines the interface in a laminated 0/90 composite consisting of SiC (Nicalon) fibers in a lithium-aluminum-silicate (LAS) glass-ceramic matrix. The material shows systematic changes in sliding resistance upon heat treatment.As-processed samples were annealed in air at 800 °C for 2, 4, 8, 16 and 100 h, and for comparison, in helium at 800 °C for 4 h. TEM specimen preparation of as processed and annealed material was performed with special care by cutting along directions having the fibers normal and parallel to the section plane, ultrasonic drilling, dimpling to 100 pm and final ionthinning. The specimen were lightly coated with Carbon and examined in an analytical TEM operated at 200 kV.

Characterization of interfaces in CVD-coated nicalon fiber-reinforced SiC

1989 ◽  
Vol 47 ◽  
pp. 556-557
Author(s):  
K.L. More ◽  
R.A. Lowden
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Frictional Stress ◽  
Fiber Reinforced ◽  
Pull Out ◽  
Carbon Coated ◽  
Fiber Matrix

The mechanical properties of fiber-reinforced composites are directly related to the nature of the fiber-matrix bond. Fracture toughness is improved when debonding, crack deflection, and fiber pull-out occur which in turn depend on a weak interfacial bond. The interfacial characteristics of fiber-reinforced ceramics can be altered by applying thin coatings to the fibers prior to composite fabrication. In a previous study, Lowden and co-workers coated Nicalon fibers (Nippon Carbon Company) with silicon and carbon prior to chemical vapor infiltration with SiC and determined the influence of interfacial frictional stress on fracture phenomena. They found that the silicon-coated Nicalon fiber-reinforced SiC had low flexure strengths and brittle fracture whereas the composites containing carbon coated fibers exhibited improved strength and fracture toughness. In this study, coatings of boron or BN were applied to Nicalon fibers via chemical vapor deposition (CVD) and the fibers were subsequently incorporated in a SiC matrix. The fiber-matrix interfaces were characterized using transmission and scanning electron microscopy (TEM and SEM). Mechanical properties were determined and compared to those obtained for uncoated Nicalon fiber-reinforced SiC.

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