Combined Bending and Axial Tension - Cross-sectional Inputs

Combined Bending and Axial Tension

Cross-sectional Inputs

All references to EN 1995-1-1:2004 unless otherwise stated.

This tests a cross-section in combined tension parallel to the grain and biaxial bending around the y-y and z-z axes according to Clause 6.2.3

Timber type

The timber type of the cross-section. See the timber database section for the types supported by Teretron.

Cross-section type

The geometry type of the cross-section.

Width b

The width of a rectangular cross-section, in mm.

Depth h

The depth of a rectangular cross-section, in mm.

Diameter d

The diameter of a circular cross-section, in mm.

Area A

The area of a generic cross-section, in mm².

Section modulus W_y

The section modulus of the cross-section about the y-y axis, in mm³.

Section modulus W_z

The section modulus of the cross-section about the z-z axis, in mm³.

Area reduction

The area reduction ΔA refers to reductions in the nominal cross-section size that have to be taken into account in the calculation of the member strength (e.g. holes from fasteners) according to Subclause 5.2(2).

It should be given as a percentage of the total nominal area of the cross-section.

Section modulus reduction

The section modulus reduction ΔW refers to reductions in the nominal cross-sectional modulus that are to be taken into account in the calculation of the member strength (e.g. holes from fasteners) according to Subclause 5.2(2).

It should be given as a percentage of the total nominal section modulus of the cross-section.

Contribution of cross-section size on the determination of member strength properties

Includes factors k_h for the calculation of the member strength in solid timber, glulam and LVL, according to Clauses 3.2, 3.3, and 3.4.

In the case of an LVL member under tension, the member length is also required.

Contribution of the load distribution system in the member strength properties

Includes factor k_sys for the calculation of the member strength, according to Clause 6.6, for a member that functions as part of a continuous load distribution system.

Note that Subclause 6.6(3) states that the strength verification for a continuous load distribution system should be carried out assuming short-term load duration.