Kurzfassung

Strength and durability are essential properties required from load-bearing members and under ideal conditions in terms of environment, construction and natural protection, wooden structures and buildings are in service for centuries without significant deterioration. But many existing structures experience ongoing moisture intrusion and resulting decay that significantly compromises the integrity of wood members. If left unmitigated, advanced decay in wood members supporting bridges, deck...Strength and durability are essential properties required from load-bearing members and under ideal conditions in terms of environment, construction and natural protection, wooden structures and buildings are in service for centuries without significant deterioration. But many existing structures experience ongoing moisture intrusion and resulting decay that significantly compromises the integrity of wood members. If left unmitigated, advanced decay in wood members supporting bridges, deck assemblies, roofs or exterior walls can and does impair the capacity of these elements to support code-prescribed loads. The result is that portions of existing structures can become unfit for occupancy. The economic and environmental impacts are considerable as well; these include demolition and disposal of building materials before the end of their expected service life, expenditure of remediation labor and materials and loss of use costs.

Objectives
Modular repair and strengthening concept for wooden members with near/or ground contact under climate exposure,
Improvement of load-bearing capacity in the decayed area,
Durable solution under outdoor conditions,
Eco-friendly and bio-based materials solution,
Simple and fast on-site assembling.

Methods
Look-up for composite material compositions on basis of former R&D projects and experiences and description of material models,
Development of a bio-based resin composite as wood supplement for damaged areas,
Investigations on adhesive bond depending on type and degree of rot, UV radiation, weather influences, and biotic attacks,
Development of a reusable formwork with natural texture,
Development of a numerical model of resin-wood composite under moisture and temperature exposure,
Model calibration based on mechanical testing.» weiterlesen» einklappen