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Development of Timber Portal Frames Composed of Compressed LVL Plates and Pins III.Strength properties of timber portal frames composed of compressed LVL beam-to-column joints and steel column-to-base joints
compressed LVL joint timber portal frame racking test beam-to-column joint column-to-base joint
2009/11/23
We made timber portal frames composed of compressed LVL beam-to-column joints and steel column-to-base joints. The former used compressed LVL plates and compressed LVL pins and the latter used steel p...
Rational Timber Frame Structure Jointed with Glass Fiber Reinforced Nylon Plate II.Strength properties of drift-pin joints under static loading
GFRP drift-pin timber joint tension resistance shear resistance
2009/11/23
A new drift-pin joint consisting of a glass-fibre-reinforced nylon (GFRP) plate inserted into a slit of the timber with steel pipe drift-pins was designed. In the previous report, basic shear properti...
Effect of Frictional Force on Lateral Resistance of Wall-Floor Joints of Wooden Light Frame Constructions
light frame construction shear wall vertical load frictional force frictional damping
2010/3/4
In wooden light frame constructions, wind or earthquake forces are transmitted through the boundaries between upper floors and walls, walls and lower floors, floors and sills, or sills and foundations...
Mechanism of Pull-out Performance in Lagscrewbolted Timber Joints II
Lagscrewbolt pull-out resistance Volkersen model thin plate specimens
2009/3/6
Lagscrewbolts were developed as a simple and economical moment-resisting connector for glulam frame constructions. This new type of connector is expected to show high pull-out resistance due to the s...
Mechanism of Pull-out Performance of Lagscrewbolted Timber Joints I
Lagscrewbolt lead hole embedment depth embedment direction edge distance
2009/3/6
At present, moment-resisting connections for glulam constructions are widely constituted as drift-pin joints with insert-steel gusset plates, as well as bolted joints. These joints consume much steel ...
Lateral Resistance of Anchor-Bolt Joints Between Timber-Sills and Foundations I.
maximum lateral resistance initial stiffness energy absorption capacity lead-hole clearance length/diameter ratio
2009/3/6
Lateral resistance of single-anchor-bolt joints was examined experimentally for ordinary specifications of Japanese post and beam constructions. Tested bolts were 12 or 16 mm in diameter and lead-hole...
Effect of Changes in the Moisture Content due to Surrounding Relative Humidity on the Contact Stress in Traditional Mortise and Tenon Joints III
compressed sugi komisen hozo-komisen mortise and tenon change of humidity
2009/3/6
This research is focused on evaluating the efficiency and failure mechanism of joints using a komisen (Japanese traditional square key) of compressed sugi (Japanese ceder ;Cryptomeria japonica D. Don)...
Effect of Crossbanded laminates on the Bearing Properties of Mechanical Joints of Laminated Veneer Lumber with a Drift Pin
crossband LVL bearing properties ductility ratio bearing energy loading speed
2009/3/6
To investigate the effects of crossbanded laminate ratios in laminated veneer lumber (LVL) on its bearing properties, tension-type bearing strength tests of drift-pin joints were made. The LVLs of par...
Mechanism of Pull-out Performance in Lagscrewbolted Timber Joints III
lagscrewbolt pull-out perpendicular to the grain Volkersen model effective area (Aw)
2009/3/6
Lagscrewbolts were developed as simple and economical moment-resisting connectors for glulam constructions. A lagscrewbolt has two threads :a screw type thread on the outside surface at one end and a ...
Effect of Changes in the Moisture Content due to Surrounding Relative Humidity on the Contact Stress in Traditional Mortise and Tenon Joints II.
komisen compressed wood contact stress mortise and tenon joint
2009/3/6
This research is a continuation of part 11), and focuses on studying the effect of cyclic humidity changes. It also evaluates the anti-relaxation effect by deformation recovery of the komisen(wooden ...
Effect of Changes in the Moisture Content due to Surrounding Relative Humidity on the Contact Stress in Traditional Mortise and Tenon Joints I.
komisen mortise and tenon contact stress compressed sugi
2009/3/6
To understand the stress transmission mechanism in the traditional timber joint, focus was aimed on the contact stress which occurs at the contact surface of mortise and tenon joints. More precisely, ...
Effect of Longitudinal Shear Plane Length on the Tensile Strength of Half-Lapped “gooseneck” Splice Joints（Kama-tsugi）
kama-tsugi shear plane length tensile strength strain distribution analysis
2009/3/6
Strain distribution analysis of half-lapped “gooseneck” splice joints (Kama-tsugi) was carried out using digital image correlation. The effect of the shear plane length on the tensile strength of the...
Effect of metal lath-staple joints on strength properties of mortar walls
conventional wooden structure external finishing mortar wall staple joint earthquake resistant design
2009/3/5
In the last report, we proposed an analysis method for the deformation and shear resistance of mortar walls. This report tried to improve the analysis method discussed before by means of providing a n...
Prevention of Splitting Failure at Hardwood Dowel Joints Connecting Two Members at Right Angles
hardwood dowel joint moment resistance shear wall racking test splitting failure
2009/3/4
Moment-resisting hardwood dowel joints connecting two members at right angles to each other, such as post and beam joints, would easily fail by splitting of the member into which hardwood dowels are i...
The Effects of Press Direction, Wood and Glue Types to the Tensile Strength on “T”Joints with Mortise and Tenon
“T”joint with mortise and tenon Wood glues Wood material Tensile strength
2009/1/14
The effects of press direction, wood and glue types on the tensile strength on "T" joints with mortise and tenon. Mortises and tenons were constructed and opened with a circular saw and glued to "T" ...