Evaluacion estructural de un puente colgante construido con materiales de recuperacion

Structural evaluation of a suspension bridge builded with recuperated materials

Muchos puentes en Venezuela, destinados a la vialidad agricola, han sido construidos por iniciativa privada. La mayoria de estos son de construccion rudimentaria; otros cuentan con cierto grado de tecnologia y han demandado considerables recursos para su construccion. Este es el caso del puente colgante "La Primavera" cuya estructura exhibe grandes deflexiones al ser solicitada por cargas de trabajo, lo que lo caracteriza como un sistema estructural muy flexible. Esta investigacion propone un procedimiento teorico experimental para el diagnostico estructural estatico y dinamico de este puente, a traves de un modelo matematico tridimensional. El metodo de analisis se fundamento en la teoria de las deflexiones y se desarrollo mediante el programa comercial Sap2000, considerando efecto P- D y, consecuentemente, el efecto de la rigidez geometrica, cuyo concepto se demostro y consolido con la calibracion del modelo. El sistema de acciones aplicadas al modelo real fue simulado en el modelo matematico. La similitud entre periodos naturales y deflexiones del modelo real con los correspondientes al modelo matematico es obvia y demuestra su validez. (A). English abstract: Many bridges in Venezuela have being builded by private initiative. The big part of these bridges are made rustically; some others are builded with some grade of technology and had demanded a lot of resources for their construction. This is the case of "La Primavera" suspension bridge, which structure exhibes big deflections when it is solicited by traffic load, what characterize this bridge like a flexible structural system. This investigation proposes a procedure that permit the static and dynamic diagnosis of suspension bridges, using a 3D mathematical model. The method of analysis has his foundations on the deflections theory, and was developed by means of the commercial program Sap2000, considering P-D effect and, in extension, the geometric stiffness effect, which concept is demonstrated. The actions system aplyed to the real model were simulated in the mathematical model. The similarity between periods and deflections of the real model and the corresponding to the mathematical model are obvious, thing that demonstrates the model validity. It was determinate that it is possible to create a flexible structural system using a mathematical conception, based in finite elements, in function of its geometric and mechanical characteristics, so that it could be possible to predict its behavior in a trustworthy form. (A).

• Authors:
  • VILLALOBOS, C
  • SARCOS, A
• Publication Date: 2005-7

Language

• Spanish

Media Info

• Pagination: 49-55
• Serial:
  • Ingenieria Civil
  • Issue Number: 139

Subject/Index Terms

• TRT Terms: Bearing capacity; Bridge superstructures; Deflection; Evaluation; Finite element method; Loads; Mathematical models; Recycling; Suspension bridges; Tests
• Uncontrolled Terms: Full scale
• Geographic Terms: Venezuela
• ITRD Terms: 6227: A escala real; 3085: Capacidad portante; 5567: Carga; 5586: Deflexion; 6255: Ensayo; 9020: Evaluacion; 6490: Metodo de los elementos finitos; 6473: Modelo matematico; PROGRAMA DE ORDENADOR; 3476: Puente colgante; 4573: Reciclado (materiales); 3473: Superestructura (puente); 9080: Tridimensional; 8124: Venezuela
• Subject Areas: Bridges and other structures; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01180410
• Record Type: Publication
• Source Agency: Centro de Estudios y Experimentación de Obras Públicas (CEDEX)
• Files: ITRD
• Created Date: Oct 7 2010 10:00AM