IRC 181985AI Search Enabled✦ AI Generated

Criteria for Prestressed Concrete Road Bridges (Post-Tensioned Concrete) (Second Revision)

IRC 18 (Second Revision, 1985) provides comprehensive design criteria for post-tensioned prestressed concrete road bridges in India. It covers materials, permissible stresses, losses in prestress, ultimate strength, shear and torsion, and detailing requirements specific to post-tensioned concrete bridge members. This standard is essential for civil and structural engineers involved in the design, construction, and assessment of prestressed concrete road bridges to ensure safety, durability, and compliance with Indian road infrastructure norms.

15Sections
54Clauses Indexed
AI Search Ready
1985Edition
Roads and Bridges IRC- Indian road congress Category
Alternative search terms: IRC 18 PDF, IRC 18 pdf free download, IRC 18 free download pdf, IRC18 PDF, IRC-18 PDF, IRC 18 1985 PDF, IRC 18:1985 PDF, IRC 18-1985 PDF, IRC 18 (1985) PDF, IRC 18 1985 edition PDF, IRC 18 edition 1985 PDF

What This Standard Covers

IRC 18 (Second Revision, 1985) provides comprehensive design criteria for post-tensioned prestressed concrete road bridges in India. It covers materials, permissible stresses, losses in prestress, ultimate strength, shear and torsion, and detailing requirements specific to post-tensioned concrete bridge members. This standard is essential for civil and structural engineers involved in the design, construction, and assessment of prestressed concrete road bridges to ensure safety, durability, and compliance with Indian road infrastructure norms.

Who Uses This Standard

  • Bridge Design Engineers
  • Structural Engineers
  • Construction Engineers
  • Quality Control Engineers
  • Bridge Inspectors
  • Prestressing Contractors
  • Civil Engineering Consultants

Key Topics Covered

Materials for Prestressing Steel and Concrete
Permissible Stresses in Concrete and Prestressing Steel
Losses in Prestress: Elastic Shortening, Creep, Shrinkage, Relaxation, Friction
Calculation of Ultimate Strength and Failure Modes
Shear and Torsion Design Considerations
Stage Prestressing Procedures
Section Properties and Minimum Dimensions for Beams and Girders
Cover and Spacing Requirements for Prestressing Steel
Design of End Blocks and Intermediate Anchorages
Splay and Minimum Radius of Cables
Grouting Practices for Post-Tensioned Cables
Emergency Cables/Strands
Testing Requirements for Sheathing Ducts

Table of Contents

1Introduction

Detailed content not available.

2Scope

Detailed content not available.

3Materials

Detailed content not available.

4Concrete

Detailed content not available.

5Loads and Forces

Detailed content not available.

6Stage Prestressing

Detailed content not available.

7Permissible Stresses in Concrete

Detailed content not available.

8Permissible Stresses in Prestressing Steel

Detailed content not available.

9Section Properties

Detailed content not available.

10Moduli of Elasticity

Detailed content not available.

11Losses in Prestress

Detailed content not available.

12Ultimate Strength

Detailed content not available.

13Calculation of Ultimate Strength

Detailed content not available.

14Shear and Torsion

Detailed content not available.

15Minimum Reinforcement

Detailed content not available.

Popular Questions About IRC 18

?What are the permissible stresses in concrete and prestressing steel according to IRC 18?

Detailed answer not available.

?How are losses in prestress such as creep, shrinkage, and relaxation calculated?

Detailed answer not available.

?What are the design requirements for shear and torsion in post-tensioned concrete bridges?

Detailed answer not available.

?How should end blocks and intermediate anchorages be designed and detailed?

Detailed answer not available.

?What are the recommended practices for grouting post-tensioned cables in bridges?

Detailed answer not available.

Need Detailed Clause Answers?

Ask AI about any clause, requirement, or provision in IRC 18. Get instant, clause-cited responses powered by our indexed library.

Free tier includes 150 queries (50 AI + 100 Reference) · No credit card required