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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These intermediate states are generated automatically based on the model in which all the construction elements are considered to be effective State 2.
Obtain the cracking and progressive fracture states is activated, the following options appear:. Assessment method The Quadrants Method is based on the results of the non-linear static analysis Pushover analysis.
If the performance point is on Quadrant III, the structure requires a more radical intervention, adding stiffness and lateral strength. 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 Covfnin analysis The structures are modeled by incorporating the structural response when it incurs in the material and geometrical non-linear range, produced by high deformations caused by accidental excitations earthquakes [ 11 ].
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Comparación de las normas sísmicas venezolana, Covenin by on Prezi
Otherwise the number is adequate. Through the use of mathematical models and computational tools, seismic behavior of the building is obtained in a suitable way.
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. Coveenin, for the first analyses, it is best if Only consider the final state is activated. The reserve of resistance was compared with an alternative approach based on bilinear representation of capacity and for its evaluation covdnin inelastic static analysis Adaptive Pushover was used.
Covnin 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.
Seismic Evaluation of Low Rise RC Framed Building Designed According to Venezuelan Codes
The Quadrants Method also uses this parameter in order to define the roof displacement of the case studied, defined according to the N2 method [ 5 ]. 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 building with plan irregularity, designed according to Venezuelan codes [ 7 ]-[ 9 ] and subjected to seismic action effect.
Seismic action used hybrid accelerograms with spectral signals similar to the design spectrum characteristic of the Barquisimeto-Cabudare metropolitan zone in Lara State. Finally, if the performance point is on the Quadrant IV, the structure does not has enough lateral strength and then the reinforcement technique must be FRP jacketing. In small increments of linear loads, equilibrium is expressed as: However, the uncertainties associated with the definition of accelerograms used in these analysis and properties of coplanar structural models can be reduced with the implementation of the dynamic 3D analysis because there are considered factors associated with structural redundancy and are used more actual values in terms of rigidity of resistant structural lines.
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.
Obtain the cracking and progressive fracture states. Using this module in CYPE-Connect, the program designs, checks and generates the detailing of coplanar joints composed of hollow structural sections, which are most commonly used in flat trusses with circular hollow sections, rectangular hollow sections, square hollow sections and hollow sections composed of two channels welded in a box. Software for ArchitectureEngineering and Construction.
One direction ribbed slabs were modeled as rigid diaphragms in its plane by using additional elements with no flexural capacity Figure 4. Learn what derived works are clicking here.
In the software used [ 18 ], it was 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.
Return to the version download area. Interstorey drifts of RB building obtained from 2D and 3D nonlinear dynamic analysis, it was noted that 2D model provided greater drifts values than the 3D model drifts. 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. This will be the Final state. Thus, the sections of the structural elements of OB are insufficient to properly control the damage caused by seismic forces.
Once any problems involving the dimensions of the structural elements have been solved and the follow-up analysis has concludedusers should then consider activating Consider all intermediate cracking and fractured states and maybe increasing the Maximum number of iterations. Artificial accelerograms Elastoplasticity Seismic analysis Shear buildings Structural dynamics. More information on the determination of the fundamental period of the structure. A modal spectral analysis of the model produces a relative displacement between the ends of each construction element which, upon applying the fracture criterion, is interpreted as being a specific level of damage.
These three earthquakes were applied to all frames from the three buildings evaluated, in order to obtain maximum displacement that can be reached by each one. Along its history, Venezuela has been severely affected by destructive earthquakes [ 1 ].
If the performance point is on the Quadrant I, the structure has enough lateral strength and stiffness, so does not need to be reinforced.
This option is deactivated when the IFC is created as a single building. Reproduction for commercial use is forbidden. Help explanations are included within the mentioned dialogue box, which describe the implications of these options. Among these tools any procedure was chosen: From this prediction it can be defined solutions for the reduction of structural vulnerability [ 3 ].
To circumvent such a situation, building codes indicate the use of artificial accelerograms, but do not provide a methodology for obtaining them.