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Journal of Structural Engineering / Volume 137 / Issue 12 / TECHNICAL PAPERS

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Finite-Element Models for Slender, Posttensioned Masonry Walls Loaded Out-of-Plane

J. Struct. Eng. 137, 1489 (2011); http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000411 (10 pages)

Jennifer R. Bean Popehn, A.M.ASCE1 and Arturo E. Schultz, A.M.ASCE2

1Design Project Manager, Target Corporation, 50 South 10th St., Minneapolis, MN 55403. E-mail: jrbean@gmail.com
2Professor, Univ. of Minnesota, Dept. of Civil Engineering, 500 Pillsbury Dr. SE, Minneapolis, MN 55455 (corresponding author). E-mail: aeschultz@umn.edu

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(Submitted 26 January 2010; accepted 24 March 2011; posted ahead of print 26 March 2011)

Nonlinear finite-element models were developed, verified, and used to simulate the measured response of twelve 3.54 m (11.6 ft) tall posttensioned masonry walls with 810×100  mm (32×4  in.) cross sections that were tested to failure under uniform lateral loading in a laboratory. Variables included masonry type, wall slenderness, degree of tendon restraint, and prestress magnitude. The force-displacement relations obtained from the experimental tests of the walls were simulated using models developed by using an extended version of the program Dynamic Response Analysis of Inelastic Two-Dimensional Structures (DRAIN-2DX), and the results illustrate the influence of tensile strength, masonry type, magnitude of prestress, and tendon restraint on wall response to out-of-plane lateral loading. The computations indicate that load-displacement response of posttensioned masonry (PTM) walls is influenced by masonry tensile strength and that the stiffness and number of tendon restraints have a direct effect on peak load capacity and postpeak unloading slope. Tendon stress and masonry compression strain responses to applied loading were also investigated using finite-element analysis.

© 2011 American Society of Civil Engineers

Article Outline

  1. Introduction
  2. Experimental Study
    1. PTM Wall Specimens
    2. Experimental Observations
  3. Finite-Element Modeling
    1. Element Description
    2. Macromodeling Approach
    3. Verification of DRAIN-2DX Model
    4. Slender Unreinforced Masonry Walls
    5. Reinforced Concrete Walls
  4. Computed Force-Displacement Relationship
    1. Influence of Tensile Strength
    2. Influence of Restraint Stiffness
    3. Influence of Number of Contact Points
  5. Other Response Parameters
    1. Displacement Profiles
    2. Computed Tendon Stress Histories
    3. Compression Strain-Displacement Relations
  6. Summary and Conclusions

KEYWORDS

ASCE SUBJECT HEADINGS

Masonry, Tendons, Stress, Finite element method, Walls

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ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0000411

PUBLICATION DATA

ISSN

0733-9445 (print)  
1943-541X (online)

Publisher

American Society of Civil Engineers

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