NORMA COVENIN (Review ). YEAR: Approved December 9, Reviewed March GENERAL REMARKS: The Norm is mandatory by law. COVENIN 82 seismic code and seismic risk analysis data were used to construct the response spectrum. Furthermore, the earthquake time duration. Mapa de zonificación sísmica para el Occidente de Venezuela, Norma Covenin En general, los valores predichos por la Norma para estas ciudades.
|Published (Last):||15 July 2017|
|PDF File Size:||13.59 Mb|
|ePub File Size:||3.72 Mb|
|Price:||Free* [*Free Regsitration Required]|
If the performance point is on Quadrant III, the structure requires a more radical intervention, adding stiffness and lateral strength. Sucre, Venezuela saber udo.
If these structural elements have not been designed accordingly for this distribution, the forces can cause a fragile fracture, endangering the stability of the building, even leading to its collapse. In Figure 13 have been plotting torsional moments in function of time for the four combinations, where nodes appointed by n until the n are corresponding to supports, while Figure 14 shows the maximum torsional moment range for each column from three-dimensional analysis.
In the software used [ 18 ], it cocenin required the implementation of dynamic loads in direction X and the assignation of a control node located in the gravity center of the roof level.
Table 5 presents the values of Pp of all the frames of evaluated buildings. These three models differ only in the dimensions of its structural elements Table 1.
It can be concluded that V-braced model presented a better overall performance than X-braced model, but covenih both cases non- braced frames showed much greater damage due to dynamic actions.
The static Pushover covenln is performed once the frames have been subjected to action of gravity loads, based on the pseudo-static application of lateral forces equivalent to displacements of seismic action [ 5 ]. These will be implemented in an upcoming version. The normalized information is the so-called elastic response spectrum, which provides the maximum response acceleration for a linear system of a degree of freedom.
1765 structure was ccovenin and detailed for a high ductility value response reduction factor of 6. The Quadrants Method presented in this paper is suitable for rapid and reliable evaluation of structures, with a low calculation effort. The seismic performance of the new designed building was tested with the Quadrants Method and dynamic analysis, showing that the resizing structure met all the Limit States used in this research.
Structural ductility for each evaluated building values are presented in Table 5. Nonetheless, and as it is not possible to generalise for all these cases, it is recommended the If the performance point is on the Quadrant I, the structure has enough lateral strength and stiffness, so does not need to be reinforced.
Mariama Njie –
From the obtained capacity curves there were computed the Performance point Pp of every frame of each evaluated building. Three-dimensional dynamic analysis applied to RB building allowed determine that interstorey drifts values were under the threshold of the Limit States considered. Inter-storey drifts adopted for the damage thresholds determination.
This document is only for private use for research and teaching activities. Built by scientists, for scientists. The damage or fracture suffered by the element causes its stiffness to vary. The approximation carried out by the For an application example, an artificial accelerogram compatible with the Brazilian Standard NBR Where Kt is the tangent stiffness matrix, Rt is the restorative forces at the beginning of the increased load.
Since this module was implemented, the program generates the line pressure loads acting towards the inside of the curve of the tendons. These combinations are based on the Venezuelan seismic code [ 7 ] and following established by [ 24 ] about the seismic response of asymmetric structural systems in the inelastic range. Then it is essential to continuously make progress and research in the field of earthquake engineering and upgrade the seismic design codes.
From the resizing model RB it was obtained interstorey drifts that satisfied the maximum value established in the code. Axis Z beams cm. Over 21, IntechOpen readers like this topic Help us write another book on this subject and reach those readers Suggest a book topic Books open for submissions.
Rectorado II, Primer Piso. This study used a mechanical method that involves non-linear analysis with deterministic and probabilistic approaches, as well as procedures of analysis based on Limits States defined by displacements [ 6 ], in order to evaluate the behavior of a low rise RC covenni with plan irregularity, designed according to Venezuelan codes [ 7 ]-[ 9 ] and subjected to seismic action effect.
Using this option, users can consult the relative displacement and associated damage, per generated state vovenin seismic loadcase of each construction element. Below these options, users can limit the Maximum number of iterations.
Acelerogramas artificiais de sismos aplicados a edificações.
Based on the code Only option in previous program versions for these codes. Seismic action used hybrid accelerograms with spectral signals similar to the design spectrum characteristic of the Barquisimeto-Cabudare metropolitan zone in Lara State. Seismic combination Node-columnDescription Max. In order to evaluate 17756 capacity curve two of the main structural parameters are taken into account.
Seismic Evaluation of Low Rise RC Framed Building Designed According to Venezuelan Codes
To study a seismic record for the dynamic analysis of a structural model parameterized to measure earthquake intensity. If the performance point is on the right side of the vertical axis Quadrant I means that the building has adequate stiffness, otherwise Quadrant II it means that the stiffness is very low and the displacements can be longer than the displacements that can produce advanced structural damage, technically or economically irreparable.
Axis X beams cm. In this method the structure is subjected to one or more seismic records scaled to coveenin levels that increase progressively. These are generated automatically depending on a fracture criterion which relates the damage suffered by an element with the relative displacement of its ends.
This structure represents a common typology used for residential buildings in Venezuela, for prone seismic zones. Dynamics analysis confirmed cocenin feature, then the cross sections covenij this building was resizing and details of the confinement were improved in order to meet the regulations of the current version of the Venezuelan seismic code.
This rights cover the whole data about this document as well as its contents. As the structure is analysed several times, if all the cracked intermediate states are considered as of the first analysis, the design process of the structure could be quite long. In Figure 3 are shown the Venezuelan rigid-soil elastic design spectrum with the response spectra obtained from the synthetic accelerograms.
Covenim deviation loads of straight sloped tendon spans and representation of the horizontal component of the anchorage Calculation of the base shear when floors below ground level are not considered in the coenin analysis CYPE-Connect Joints V.
The first one is the design civenin shear, obtained from the elastic analysis of the structure using the elastic design spectrum. Artificial accelerograms Elastoplasticity Seismic analysis Shear buildings Structural dynamics.
Figure 5 shows an example of the normalized capacity curve with the idealized bi-linear curve of Frame C of OB. Please bear in mind that users who have any version can update to the latest version for free.