Thin-walled cold-formed steel (CFS) structures are widely used in low-storey buildings and seeing increased applications multi-storey as well long-span structures. The bolted connection is one of the most common types fasteners employed CFS bolt slippage load-bearing mechanism connections have a significant influence on structural behaviour construction assemblies, which typically numerically s...

For tunnel-support engineering, the bed separation of surrounding rock has a great influence on support performance bolts. In order to reveal mechanical properties full-grouted prestressed bolt under separation, three typical working conditions single-separation, multi-separation and different positions were set up, theoretical models numerical established. Furthermore, characteristics axial fo...

Rock bolting has firmly used as the coal mine roof reinforcement in underground coal mine. The bolting effect of fully grouted rebar bolt is closely related to the bolt surface profile. This paper provides an experimental study to confirm that bolt rib internal length has great influence on bolting effect. Pull-out tests were conducted using rebar bolt with different rib spacings of 12, 24, 36 ...

Design parameters such as initial bonding section, prestress, and stiffness have a significant impact on the mechanical properties of full-length bonded prestressed bolt. In order to understand influence above three axial force shear stress anchor bolts under condition rock separation, theoretical numerical models were established, sensitivity different was analyzed based grey correlation metho...

Fully grouted bolts are widely used in engineering. In order to deeply understand the load-transfer mechanism of a fully bolt, it is necessary analyze and study its mechanical behavior under axial cyclic load. First all, based on idea discretization force balance analysis each mass spring element, this proposes method for analyzing bolt—the element method. Second, model bolt established by usin...

To study the evolution law of axial force and shear stress a full-length anchorage bolt in rectangular roadway during driving working face mining, based on analysis bolt, considering elastic parameters geometric size effect bearing plate surrounding rock, cross-section shape, deformation degree, parameters, mechanics mathematical methods were used to establish mechanical model describing intera...

The introduction of carbon-fibre reinforced plastics in load bearing automotive structures provides a great potential to reduce vehicle weight and fuel consumption. A reduction in overall manufacturing cost can be realised through part integration and use of cost-effective materials such as heavy tow carbon fibre. There is a current drive within the automotive industry to develop the technologi...

Due to their high bending stiffness, torsional and local stability, rectangular section members of Al alloy space structures are frequently utilized as load-bearing elements. However, the joint construction is more complex because closed cross-section. To join without drilling holes in them, a variety blind bolts that can be placed fastened on one side have been devised. The researched this pap...