ADAPT-ABI
Introduction
ADAPT-ABI is essential for any serious prestressing or post-tensioning designer. Select ADAPT-ABI for expedient and rigorous solutions to complex single- or multi-story frames with tendons of varied profiles and stresses or other irregularities.
ADAPT-ABI is a general finite element program which performs time-dependent analysis of concrete bridges and frames during and after the construction phase. ABI can investigate the effect of newly placed concrete, creep, shrinkage, and relaxation in prestressing over time, aging of concrete, and variation in temperature. Its excellent graphical interface can display moments, shears, stresses, and deformations for various stages of construction. The software can handle nonprestressed concrete, precast, cast-in-place, pre-tensioned or post-tensioned frames. The software is intended for incrementally constructed bridges and frames; retrofit of concrete frames where new concrete is added, new members are added or existing members are modified; and demolition (reverse construction) of frames. Other applications include composite construction and cable-stay structures. The basic module of the software (ADAPT-ABI Basic) is self-contained and complete. Other modules enhance the capabilities of the basic program.
These are:
ADAPT-Gen Module
ADAPT-Gen enables the user to (i) break the structure into spans and columns; (ii) display and tabulate the solution in a span-and-column format; (iii) include automatic pattern loading; and (iv) combine different loading conditions and compile envelopes of load cases. Other features are directed toward making the software an effective production tool.
ADAPT-Moving Load Module
The moving load module is developed primarily for bridge construction. Using the software's library of the most common truck or train loads, or a user-defined library, the program automatically moves the loading along a user-defined path and generates an envelope of sectional actions for combination with other loading. The moving load module of ABI is general and comprehensive. It is designed to cover all foreseeable conditions in bridge design.
Versatile Moving Load Generator
- Virtually any arrangement of moving loads
- Multiple travel paths, continuous or interrupted
- Multiple lanes
- Pre-defined moving load libraries
- AASHTO library
- BS 5400
- European code and other libraries
- Locomotives
- Trains
- Exceptional wagons
- Permit loads
- User defined load library
- Each load can have its own distribution and impact factor
- Ability to disregard unfavorable contribution of wheel loads
- Envelope of maximum moment with associated shear
- Combination of moving load with self-weight, superimposed dead load and other load
- Influence lines for deflection, moment, shear and axial loading
- Comprehensive and clear manual
ADAPT- Elongation Module (includes friction and stress loss)
At the completion of an ADAPT-ABI computer run, and without any additional input data, this module calculates the elongation of each of the tendons at stressing and the associated stress losses. The stress losses include the effects of friction and the time-dependent parameters of creep, shrinkage, and relaxation in prestressing.