Title:
Nonlinear Analysis of RC Frames Subjected to Thermal and Mechanical Loads
Author(s):
F. J. Vecchio
Publication:
Structural Journal
Volume:
84
Issue:
6
Appears on pages(s):
492-501
Keywords:
creep properties; frames; loads (forces); reinforced concrete; stiffness; stress-strain relationships; structural analysis; tension; tests; thermal gradient; thermal stresses; Structural Research
DOI:
10.14359/2750
Date:
11/1/1987
Abstract:
A simple analytical procedure is presented that enables accurate prediction of the response of reinforced concrete plane frames to thermal and mechanical loads. The formulations given allow standard linear elastic procedures to be used in a nonlinear mode by incorporating secant stiffness factors and an interactive solution process. Rigorous section analyses, using a layered approach, are performed in determining effective member stiffnesses. Influencing factors such as nonlinear material stress-strain response, tension stiffening effects, membrane action, thermal creep, load and time history, nonlinear thermal gradients, and material properties at elevated temperatures can be taken into account using appropriate models. Preliminary test results are compared to predictions obtained from the proposed procedure, and good agreement is obtained. Aspects pertaining to the application and performance of the method are also discussed.