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.
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The thresholds have been computed from characteristic values of three levels of damage proposed in [ 15 ] and are showed in Table 2. Inter-storey drifts adopted for the damage thresholds determination.
Unbalanced loads are applied again until it can covenun a convergence criterion. The RB building is analyzed, defining its geometry, materials and sections, serviceability loads in Y direction in all beams-columns joints, and dynamic loads on outer nodes with directions and combinations shown in Table 4.
GT Descriptor_PC: Alejandría BE b3
We are IntechOpen, the world’s leading publisher of Open Access books. Below these options, users can limit the Maximum number of iterations. Dynamics analysis confirmed this feature, then the cross sections of 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.
Flat trusses with hollow structural sections CYPE-Connect was implemented in the previous program version Since this module was implemented, the program generates the line pressure loads acting towards the inside of the curve of the tendons. The Interaction of the structure with the construction elements module allows users to consider the effect the non-structural elements have on the structure during an earthquake and as of the Similarly, interstorey drifts for applied earthquakes, R1, R2 and R3 with its three intensities, were obtained.
The first one is the design elastic shear, obtained from the elastic analysis of the structure using the elastic design spectrum. Reproduction for commercial use is forbidden.
Seismic Evaluation of Low Rise RC Framed Building Designed According to Venezuelan Codes
Performance points Pp of studied buildings frames. Checks the Venezuelan seismic code. The structure was designed and detailed for a high ductility value response reduction factor of 6. Prevention of Collapse Limit State; -: Now, with the In the verification of interstorey drifts it was generally noted that interstorey drifts of OB building were longer than the considered by hazard levels, while the two resized buildings reached values within the thresholds established for each Limit State.
These will be implemented in an upcoming version.
Results let to compute the damage lumped in specific elements of the structure, but these results are beyond the objective of this Chapter. This document is only for private use for research 7156 teaching activities. From this Table it is evident that the original building, designed according to current Venezuelan codes has ductility values lower than the redesigned and the displacement-based buildings. The capacity curves were normalized according to the weight of the buildings in order to unify the comparative criteria.
Verification of section 2. On the other hand, when designing in accordance to some seismic standards, the minimum base shear condition must be met when a dynamic analysis modal spectral is applied.
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The performance point is a common procedure accepted among the scientific community to evaluate the seismic performance of a structure under a specific demand. This information allows users to know if the iterative process that has been configured is adequate or must be changed:.
In other words, if users deactivate this option, the program only takes into account the floors above ground level when calculating the base shear using the static method. Limit States and seismic hazard level. Based on the code Only option in previous program versions for these codes. A second model was designed adjusted to seismic performance requirements formulated by Herrera et al.
This is a logical and expected result since the 3D dynamic analysis considers the rigid diaphragm, which introduces restrictions to the number of degrees of freedom in the structure.
Nxm 1 Corner column.
Both types of drifts were calculated on the basis of the application of synthetic accelerograms with different intensities, representing the lateral forces applied to frames in order to generate their respective maximum displacements. Where Kt is the tangent stiffness matrix, Rt is the restorative forces at the beginning of the increased load.
Both values are computed from the idealized capacity curve of the structure. November 21st Published: These restorative forces are calculated from:.
This information allows users to know if the iterative process that has been configured is adequate or must be changed: Report justifying the calculation of the internal thermal energy This report justifies the calculation of the internal thermal energy of the occupied units of the building units which can be obtained for each occupied unit or for a group of them.