[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.

Author: Taukasa Gagore
Country: Brunei Darussalam
Language: English (Spanish)
Genre: Photos
Published (Last): 18 February 2008
Pages: 417
PDF File Size: 8.74 Mb
ePub File Size: 19.9 Mb
ISBN: 645-6-61821-288-8
Downloads: 95803
Price: Free* [*Free Regsitration Required]
Uploader: JoJozragore

I, II, [mm 2 ] Beam cross section reduced to timber A equiv.

The introduction of the reinforcing element into the construction exerts an optimal effect on the distribution of stresses between individual elements of the structural. The formation mechanism was discussed; and a SSD model was presented. Technical properties of the applied materials are presented in Figure 2. 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, neuhas the web of the I-beam, and wood flanges of the beam.


The type of the examined beams as well as the boundary conditions and loading type are presented in Buudownictwo 1. In order to compare the strength parameters, the author made an assumption that there were identical contact areas between the composite and wood.

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

Methods to Assess Load Capacity of the Old Wooden Building Components

This paper uses ANSYS finite element program to do the nonlinear finite element analysis on steel reinforced concrete L-shaped short-shear walls.

After the discretisation, the beam model consisted of the following quantities of finite elements: Mielczarek, Budownictwo drewniane, Wydawnictwo Arkady, Warszawa, Distribution of equivalent stresses at the 9 kN load in the central cross sections of beams: Distribution of reduced stresses in the composite Budownictso on the literature review related to experiments on both timber and concrete beams drewhiane with carbon composite, it can be concluded that the destruction mechanisms are similar [1, 3, 4, 7, 10].


Numerical specimens with two pre-existing flaws is established by using particle flow code PFC2D and by changing the relative position of the pre-existing flaws different rock bridge angle is obtained. It is quite obvious from the distribution of the equivalent stresses in individual beam models budlwnictwo the values budowjictwo equivalent stresses in the reinforced beams declined in comparison with beams which were not reinforced.

The development process of cracks until the specimen damaged is revealed. The construction methods to control the fissure was proposed: The analysis of the form of deflections of individual models revealed, that the deflection line takes the form of a parabolic curve deflected more or less depending on the parameters of the carbon fibre. Konstrukcje drewniane — Obliczenia statyczne i projektowanie.

Tomasz Nowak – Cytowania w Google Scholar

Beam cross section reduced to timber A equiv. Depending on the work conditions of construction the consumption manifest itself through: Theoretical calculations of the rigidity of the reinforced combined beams, taking into account material diversity of the composite, were carried out according to the classical elasticity theory referring to deformable materials [4, 10].

Eurokod 5 Projektowanie konstrukcji drewnianych.

Application of concentrated forces of the beam model Figure 4 shows a perspective view of an exemplar model after its discretisation as well as the mutual contact of solid finite elements at the contact interface of materials. Wood as an engineering material. In this way, it is possible to save good quality timber material and replace it by timber of poorer quality reinforced by modern composite materials.


By comparing the numerical results with actual cracks condition, the impact of improper construction procedure on cracks of Block No. The improvement of the load-carrying capacity can be achieved, among others, by gluing the composite in the form of bands or mats to the base or by gluing inside the reinforced element.

In this way, it is possible to improve strength parameters without affecting significantly the dimensions or weight of the structure itself. Mechanics of wood and composites. Distribution of reduced stresses in the beam type — 0: The subsurface damage SSD generated in processing has great effect on the strength and performance of the substrates.

Hong Yuan Tang, Wei Lin.

Methods to Assess Load Capacity of the Old Wooden Building Components

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.

Drewniame, [in Polish]. Through applying the vertical and horizontal load on the model, three typical stages of the whole working period are studied. The results of numerical analyses for the selected models are presented in Figure 6 in the form of fields of displacements.

This effect refers to the unification of mechanical properties in relation to wood defects, e. Finite Element Analysis in Engineering Practice.

Author: admin