[1]: H. Neuhaus H., Budownictwo drewniane, (Wood constructions), Polskie w ocenie postępu korozji biologicznej drewna i konstrukcji drewnianych, The. W tym celu przeprowadzono analizę nośności drewnianych stropów, która .. [5] Neuhaus H., Budownictwo drewniane, Polskie Wydawnictwo. Podstawowe zasady projektowania elementów konstrukcji drewnianych według W: Neuhaus, Helmuth: Budownictwo drewniane: podręcznik inżyniera.

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In this way, it is possible to improve strength parameters without affecting significantly the dimensions or weight of the structure itself. In order to compare the strength parameters, the author made an assumption that there were identical contact areas between the composite and wood.

And the cracking load and deformation regularity in various stages are obtained. Because of their promising properties, intensive investigations have been carried out in recent years to study the utilisation of these materials to enhance the load-carrying capacity of different types of building structures, among others, by reinforcing certain elements made of steel, concrete or wooden structures.

Through applying the vertical and horizontal neuhauw on the model, three typical stages of the whole working period are studied. Types of beams and way of loading: Composite modulus of elasticity [GPa].

Obliczenia statyczne i projektowanie [Timber structures. Axis orientation of the adopted system of coordinates. It should be mentioned that, because the glue bond connecting the component elements of the construction was very thin, its impact was disregarded during the modelling process.

The stress reduction increased with the increase of the longitudinal elasticity coefficient of the composite. DR [mm 2 ]. On the other hand, these stresses increase in the timber at contact boundaries with the composite as well as in the carbon composite itself. The results of numerical analyses for the selected models are presented in Figure 6 in the form of fields of displacements.

Szczecin-Swinoujscie, [in Polish]. It is quite obvious from the distribution of the equivalent stresses in individual beam models that the values of equivalent stresses in the reinforced beams declined in comparison with beams which were not reinforced.


Axis orientation of the adopted system of coordinates Numerical calculations of deflections of the combined beam models were carried out at two ranges of loads: The development process of cracks until the specimen damaged is revealed.

The way of positioning of the two types of composites are shown in Figures 1b and c. In this paper, the surface and subsurface damage caused by saw cutting, rough lapping and fine lapping of MgO substrates were studied by cross-section of microscopy and SEM. In numerical calculations, a permanent connection without slip between the component elements of the beam was assumed, i. View of the solid model of the reinforced beam type ll S The geometry of the model used for the simulation calculations was determined in the global system of coordinates Fig.

In addition, the investigations aimed to determine the values of stresses and deformations, primarily, in the zone of the connection of the composite and wood as well as in the jointing area of the OSB board, as the web of the I-beam, and wood flanges of the beam.

Advanced Materials Research Volume Identification of estimated points on the cross section Table 4.

Sliding Joints from Traditional Asphalt Belts p. The introduction of the reinforcing element into the construction exerts an budownicgwo effect on the distribution of stresses between individual elements of the structural.

Calculations were performed on numerical models employing the finite elements method FEM. I, II, [mm 2 ]. This number of finite elements resulted from drewniand assumed quality parameters of generated mesh which were to minimise the possibility of the occurrence of peculiarities in the course of calculations. The analysis of numerical calculations of the displacement confirms that the rigidity of reinforced beams increases in comparison with the rigidity of the non-reinforced beams.

Budownictwo drewniane: podręcznik inżyniera – Helmuth Neuhaus – Google Books

Their characteristic properties are given in Table 1 [9]. The obtained results were presented in the form of fields of combined states of stresses and deformations in individual beam elements. Shrinkage of Industrial Concrete Floors p. Depending on the work conditions of construction the consumption manifest itself through: Distribution of reduced stresses in the composite Based on the literature review related to experiments on both timber and concrete beams reinforced with carbon composite, it can be concluded that the destruction mechanisms are similar [1, 3, 4, 7, 10].


View of the solid model of the reinforced beam type ll S. Noticeable increments of load-carrying capacity and rigidity of reinforced beams regions of the maximum effort of the material and the form of deformations at a specified level of were found depending on the degree of the applied reinforcement.

The reinforcement effect was achieved by combining, with the assistance of the gluing technique, of a Budowbictwo type budiwnictwo composite with wooden elements of the beam.

Methods to Assess Load Capacity of the Old Wooden Building Components

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. It is target for persons budownoctwo both in science and industry,regulatory agencies or teaching in agricultural sector.

Also the values of acceptable normal compression stresses were not exceeded in any of the examined beams.

Table 3 presents results of deflections of all types of beam models in the central area both for analytical and numerical calculations. After the discretisation, the beam model consisted of the following quantities of finite elements: Based on the real construction technology, process and environment of Yuquanxi Jeuhaus, the finite element method was applied in the research to make sure the crack mechanism and find out the impact of improper construction procedure on cracks of Block No.