Timber Creep of Historic Urban Quay Walls: The influence of timber creep on the assessment of inner-city quay walls

Amsterdam and many other cities consist of a network of old quay walls, which sometimes have been constructed over a century ago. A large uncertainty exists concerning the current safety of these quay walls and their remaining service lifetime. In the current framework for the assessment of old urban quay walls, the influence of timber creep in...

Flexible Vrieheide

Structural assessment of existing timber roof structures for green roofs in Rotterdam

Green roofs, also known as vegetation roofs, are becoming very popular for residents of houses or apartments and for good reasons. Vegetation on rooftops have many benefits on global and local level. Expectations show that the climate change will lead to heavier storms and causes the sewers in Rotterdam to overflow. Hence, the municipality of...

Structural assessment of existing timber roof structures for green roofs in Rotterdam

Green roofs, also known as vegetation roofs, are becoming very popular for residents of houses or apartments and for good reasons. Vegetation on rooftops have many benefits on global and local level. Expectations show that the climate change will lead to heavier storms and causes the sewers in Rotterdam to overflow. Hence, the municipality of...

The Myth of Softening behavior of the Cohesive Zone Model Exact derivation of yield drop behavior of wood

It is shown that the postulate of strain softening of the fracture stress is based on the error to regard the nominal stress to be the actual, ultimate stress, at the actual area of the fracture plan. Strain sof-tening called yield drop is elastic unloading of the actual elastic stress at the intact, not ltimate, elas-tic loaded part of the...

Material model for wood

Wood is highly anisotropic and shows ductile behaviour in compression and brittle behaviour in tension and shear where both failure modes can occur simultaneously. A 3D material model for wood based on the concepts of continuum damage mechanics was developed. A material subroutine containing the developed model was implemented into a standard FE...

Force distribution and connection strength in timber lock gates

For the thesis the mortise and tenon joint between the rear post and cross beam in a wooden mitre gate is researched. The joint is an important part of timber lock gates. The force distribution inside the joint and the strength of a tenonned beam are two main focus points.

Feasibility of Tall Timber Buildings

Advantages of timber as a building material are: small dead weight, good thermal characteristics and in some cases low overall building cost. Nature has created large cantilever structures of 150 m high in the form of eucalyptus threes. History show furthermore manmade structures as timber radio towers of 190 m high and wooden religious...

Theoretical Explanation Of The Mechano-Sorptive Effect In Wood

It is possible to explain the so called mechano-sorptive effect that occurs in wood by moisture cycling by an earlier derived general deformation kinetics model, as a bond breaking process of secondary bonds, causing internal shifts of adjacent layers with respect to each other, due to sorption.