Development of a Handbook for Seismic Performance Testing of Bridge Piers

Abstract

In order to provide assistance to seismic performance investigators in efficiently producing or obtaining consistent and reliable experimental testing results, Federal Highway Administration developed the "Handbook for Seismic Performance Testing of Bridge Piers"(name subject to modification at publication), which contains information on preparation, execution, and documentation of such testing. This document is purported for use in both academic research and engineering validations. It provides elaborate description on an assembly of available testing procedures while alternatives are offered for special test needs. Although most existing testing procedures are for steel or concrete pier columns, restriction on material is not explicitly specified in this document. Elements with advanced material can be tested using the listed methods. Requirements on testing record are given, so to allow many users to access and verify the testing results in a later time. Assistance from experienced experimental experts and bridge engineers were requested during the development of the document. An expert panel including members from academia, state highway agencies, and federal government, was assembled to advise the progress and review the product. At the time of completion of this paper, the FHWA guidance document is at its final stage of technical revision and will be published in a short time.

Protocolos De Carga Para Puentes De Acero Sujetos a Bajos Factores De Sobrerresistenica

“…Sin embargo, debido a que la subestructura está construida enteramente de acero A36, se dificulta la elección de un protocolo de carga adecuado. No existe en los códigos actuales lineamientos para ensayar bajo cargas sísmicas puentes completamente hechos de acero (Shen, Yen, & O'fallon, 2004).…”

“…Tomando en cuenta que la experimentación debe ser un ensayo cíclico cuasi estático, porque debido a su baja velocidad facilita realizar las modificaciones necesarias para ajustarlo a circunstancias imprevistas (Shen et al,2004), se modelarán varios marcos con diferentes secciones de vigas de techo a diferentes niveles de ductilidad. El propósito es obtener distintos valores del factor de sobrerresistencia ( ).…”

Study on Seismic Performance of Reinforced Concrete Multi-Span Cantilever Girder Bridge after Reinforcement

“…Some reasonable assumptions are used in the finite element model established by large structural analysis program ANSYS, to maximum limit quality variation and the change of rigidity in the finite element model [2] (before and after reinforcement, the difference volume of concrete demanded in superstructure of the bridge is 2.3%, the quality difference in FEA model is 6% , and quality difference of bridge deck system is only 0.4%), which can more objectively modeling the geometry of structure, material properties, and the authenticity of the boundary connecting conditions. reasonable assumptions are as follows:…”

“…(1).The upper structure is dispersed into lattice beam system contains a series of longitudinal and transverse spatial three-dimensional beam (BEAM4). (2). By discrediting the Bridge deck pavement into space shell element (SHEULL63) with the same thickness.…”

“…When the number of bridge span is more than five, double cantilever girder can be used in the middle span, sample suspended girder is used to connect cantilevers, and connect between cantilever and abutment [1] . The other form, single cantilever girder can be used in the abutment, and double cantilever girder is used in the middle span, and cantilevers are connected with suspended beam [1,2] .…”