Methods to Assess Load Capacity of the Old Wooden Building Components

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Abstract:

Wooden constructions are very susceptible to damage caused by improper operating conditions. Depending on the work conditions of construction the consumption manifest itself through: growth of cracks, loose connections, exceeding the allowable diffracts, constant moisture, development of fungus and mold, the occurrence of pests. Determining the type of these defects and their impact on work conditions is the topic of this article. Determination of strength properties of the component consist on establishing the type and kind of wood used in the construction and its class making it is possible to assign standardized permissible stress values and the modulus of elasticity. Determination of the extent to which the original cross-section of the component has been damaged during operation (shallow or deep crack, shrinkage crack, damage of internal structure of the wood by insects and fungus, moisture) allows to determine how much the strength properties of the wood component has been deteriorated. The static-strength analysis aims to determine the actual strength of load capacity of the component and stability of the whole object after taking into account the adverse impact of consumption and damage of the construction and allows determining and selecting suitable variant of renovation, repair or enhance the construction of the object. The article depicted the methods of determining the rate of consumption of the construction and taking into account the effect of cracks, moisture, fungi and insects action on the load capacity of wooden components..

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341-346

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October 2014

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