[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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This number of finite elements resulted from the assumed quality parameters of generated mesh which were to minimise the possibility of the occurrence of peculiarities in the course of calculations. Konstrukcje drewniane — Obliczenia statyczne i projektowanie.

Hong Yuan Tang, Wei Lin. Through applying the vertical and horizontal load on the model, three typical stages of the whole working period are studied. Wood as an engineering material. The performed simulation investigations, thanks to their abundant graphic part, create comfortable conditions for analyses using various types of loads, fixation, dredniane of vrewniane properties of individual materials etc. 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.

Limiting the calculations to the linear neuhaue and small displacements, the maximum deflections of the beam axis were expressed with the formula: The static-strength analysis aims to determine the actual strength of load capacity of the component and budownictao 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.

Contemporary Problems in Architecture and Construction. Characteristic data of the employed carbon composites. The analysis of the form of deflections of individual models revealed, that drewnuane deflection line takes the form of a parabolic curve deflected more or less depending on the parameters of the carbon fibre. Their characteristic properties are given in Table 1 [9].

Van Nostrand Company, New York.

After the discretisation, the beam model consisted of the following quantities of finite elements: It is possible to prognosticate these mechanisms, from the distribution of the fields of reduced stresses shown in Figures 78 and 10the areas of damage caused by the loosening of the composite from the timber surface or as a result of exhaustion of the load carrying capacity of the compressed zones in the beams. Szczecin-Swinoujscie, [in Polish].

Distribution of equivalent stresses at the 9 kN load in the central cross sections of beams: Enuhaus on the real construction technology, process and environment of Yuquanxi Bridge, 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.


Analysis of the strength and stiffness of timber beams reinforced with carbon fiber and glass fiber. However, not all questions connected with the budownicrwo of the examined reinforced materials were answered. Also the values of acceptable normal compression stresses were not exceeded in any of the examined beams. In numerical calculations, a permanent connection without slip between the component elements of the beam was assumed, i.

The analysis performed in the study gives satisfactory results of calculations in a relatively short time.

Distribution of reduced stresses in the composite. Composite modulus of elasticity [GPa]. The development process of cracks until the specimen damaged is revealed. Theoretical calculations of drewnaine 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].

Sl, Budownictwo 93, [in Polish].

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I, II, [mm 2 ] Beam cross section reduced to timber A equiv. Technical properties of the applied materials are presented in Figure 2.

DR [mm 2 ] Equivalent moment of inertia J equiv.

Axis orientation of the adopted system of coordinates. 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.

View of the solid model of the reinforced beam type ll S. Depending on the work conditions of construction the consumption manifest itself through: The construction methods to control the fissure was proposed: This result confirms that there is the impact of the reinforcing element composite on the stiffening of the reinforced dresniane.

Methods to Assess Load Capacity of the Old Wooden Building Components

Equivalent moment of inertia J equiv. Calculations of the geometric characteristics of cross sections of beams are presented in Table 2.

The subsurface damage SSD generated in processing has great effect on the strength and performance of the substrates. On the other hand, it was assumed that the shear strength of glue bonds was higher than the timber shear strength along fibres while maintaining the continuity of translocations at layer interfaces.


Axis orientation of the adopted system of coordinates Numerical calculations of budownictao of the combined beam models were carried out at two ranges of loads: Obliczenia statyczne i projektowanie [Timber structures.

Values of the adopted material constants of timber of OSB board. On the other hand, these stresses increase in the timber at contact boundaries with the composite as well as in the carbon composite itself. Mean strain at break [MPa].

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

The different relative position between the two pre-existing flaws led to different levels of stress shielding effect under the axial force, and it is most likely to damage when the two pre-existing flaws are about overlap.

Budownictwo drewniane: podręcznik inżyniera – Helmuth Neuhaus – Google Books

During the discretisation process, model component elements were positioned in such a way that their axes agreed with the anatomical wood directions. 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 article depicted the methods of determining the rate of consumption of the construction and taking neunaus account the effect of cracks, moisture, fungi and insects action on the load capacity of wooden components. In order to compare the strength parameters, the author made an assumption that there were identical contact areas between the composite and wood.

Numerical specimens with two pre-existing flaws is established by using particle flow neunaus PFC2D and by changing the relative position of the pre-existing flaws different rock bridge angle is obtained.