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- Title
- Behavior of laterally loaded pile for integral abutment bridges.
- Creator
- Butrieng, Narongrit., Florida Atlantic University, Arockiasamy, Madasamy
- Abstract/Description
-
Integral construction is being used to reduce the maintenance cost and avoid problems associated with bridge deck joints. Continuous deck jointless bridges with joints only at abutments and integral bridges with no joints at abutments are two major types of integral constructions being adopted. Integral abutment bridges accommodate superstructure movements without conventional expansion joints. The current practices adopted by various state departments of transportation are evaluated to...
Show moreIntegral construction is being used to reduce the maintenance cost and avoid problems associated with bridge deck joints. Continuous deck jointless bridges with joints only at abutments and integral bridges with no joints at abutments are two major types of integral constructions being adopted. Integral abutment bridges accommodate superstructure movements without conventional expansion joints. The current practices adopted by various state departments of transportation are evaluated to arrive at a rational design procedure for integral abutment bridges. An illustrative numerical design example of an integral abutment bridge is presented with emphasis on the pile-soil interaction, temperature, creep and shrinkage effects and varying soil strata. Important design parameters are identified concerning the selection and design of pile, use of predrilled hole, the type of fill in the predrilled hole, elevation of water table, soil type, and pile orientation. The effect of these parameters are analyzed using LPILE and FB-Pier computer programs.
Show less - Date Issued
- 2001
- PURL
- http://purl.flvc.org/fcla/dt/12868
- Subject Headings
- Bridges--Abutments, Piling (Civil engineering)
- Format
- Document (PDF)
- Title
- Creep and shrinkage effects on integral abutment bridges.
- Creator
- Munuswamy, Sivakumar., Florida Atlantic University, Arockiasamy, Madasamy, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
- Abstract/Description
-
Integral abutment bridges provide bridge engineers an economical design alternative to traditional bridges with expansion joints owing to the benefits, arising from elimination of expensive joints installation and reduced maintenance cost. The superstructure for integral abutment bridges is cast integrally with abutments. Time-dependent effects of creep, shrinkage of concrete, relaxation of prestressing steel, temperature gradient, restraints provided by abutment foundation and backfill and...
Show moreIntegral abutment bridges provide bridge engineers an economical design alternative to traditional bridges with expansion joints owing to the benefits, arising from elimination of expensive joints installation and reduced maintenance cost. The superstructure for integral abutment bridges is cast integrally with abutments. Time-dependent effects of creep, shrinkage of concrete, relaxation of prestressing steel, temperature gradient, restraints provided by abutment foundation and backfill and statical indeterminacy of the structure introduce time-dependent variations in the redundant forces. An analytical model and numerical procedure to predict instantaneous linear behavior and non-linear time dependent long-term behavior of continuous composite superstructure are developed in which the redundant forces in the integral abutment bridges are derived considering the time-dependent effects. The redistributions of moments due to time-dependent effects have been considered in the analysis. The analysis includes nonlinearity due to cracking of the concrete, as well as the time-dependent deformations. American Concrete Institute (ACI) and American Association of State Highway and Transportation Officials (AASHTO) models for creep and shrinkage are considered in modeling the time dependent material behavior. The variations in the material property of the cross-section corresponding to the constituent materials are incorporated and age-adjusted effective modulus method with relaxation procedure is followed to include the creep behavior of concrete. The partial restraint provided by the abutment-pile-soil system is modeled using discrete spring stiffness as translational and rotational degrees of freedom. Numerical simulation of the behavior is carried out on continuous composite integral abutment bridges and the deformations and stresses due to time-dependent effects due to typical sustained loads are computed. The results from the analytical model are compared with the published laboratory experimental and field data. The behavior of the laterally loaded piles supporting the integral abutments is evaluated and presented in terms of the lateral deflection, bending moment, shear force and stress along the pile depth.
Show less - Date Issued
- 2004
- PURL
- http://purl.flvc.org/fau/fd/FADT12067
- Subject Headings
- Bridges--Abutments, Concrete--Creep, Concrete--Expansion and contraction
- Format
- Document (PDF)