Stress Analysis of Cracked Arbitrary Concrete Section Under Service Load


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Title: Stress Analysis of Cracked Arbitrary Concrete Section Under Service Load

Author(s): Troels Brohdum-Nielsen

Publication: Journal Proceedings

Volume: 77

Issue: 6

Appears on pages(s): 458-468

Keywords: bending; biaxial loads; cracking (fracturing); creep properties; deformation; fatigue (materials); loads (forces); partial prestressing; prestressed concrete;prestressing steels;reinforced concrete;serviceablity; shrinkage; strains;sress analysis.

Date: 11/1/1980

Stress analysis of concrete sections under service load is complicated by the interaction of shrinkage, creep, elastic strains of concrete and steel, and steel relaxation. Further complications arise in the analysis of partially prestressed concrete structures with cracked cross sections under service load and with mixed reinforcement consisting of a combination of prestressed and nonprestressed reinforcement with individual mechanical properties and different effective depths. Combinations of sustained and instantaneous loads also complicate the analysis, whereas compound bending is easily taken into account. The problem dealt with here has been discussed by the author in a previous paper for cases of symmetrical bending. In the present paper, the general case of biaxial bending or arbitrary cross section is analyzed.