FIRES-RC II. Computer Program for the FIre REsponse of Structures--Reinforced Concrete Frames. Second Revised Version.
FIRES-RC II. Computer Program for the FIre REsponse of
Structures--Reinforced Concrete Frames. Second Revised
Version.
(112670 K)
Iding, R. H.; Bresler, B.; Nizamuddin, Z.
NBS GCR 78-115; UCB FRG-77-8; 249 p. July 1977.
Sponsor:
National Bureau of Standards, Washington, DC
National Science Foundation, Washington, DC
Available from:
National Technical Information Service
Order number: PB-278661
Keywords:
building fires; computer programs; concretes; creep
tests; failure analysis; fire models; steels; structural
failure; construction materials; thermal degradation
Abstract:
FIRES-RC II is a computer program used to evaluate the
structural response of reinforced concrete frames in
fire environments. The report describes the analytical
and material behavior models upon which FIRES-RC II is
based. The thermal response associated with fire
environments used for the analysis of reinforced
concrete frames in FIRES-RC II is predicted by a
companion computer program, FIRES-T. A nonlinear,
direct stiffness formulation couples with time step
integration is the analytical technique used in
FIRES-RCII. Within a given time step, an iterative
approach is used to find a deformed shape which results
in equilibrium between internal stresses and external
forces. The material behavior models for concrete and
steel acount for dimensional changes caused by
temperature differentials, changes in mechanical
properties of materials with changes in temperature,
degradation of sections bu craclomg amd/or crushing, and
increased rates of shrinkage and creep with an increase
in temperature. Nonlinear stress-strain laws, in which
inelastic deformation associated with unloading is
accounted for, are used in FIRES-RC II to model concrete
and steel behavior. The report includes a user's manual
for FIRES-RC II, a sample problem, and a listing of the
program.
