Adhesive anchorage systems have found widespread use in structural applications, including bridge widening, concrete repair and rehabilitation, and barrier retrofitting. Because these applications typically require adhesive anchorage systems to be installed outdoors, the effects of climate conditions and day-to-day temperature fluctuations on adhesive behavior and performance should be considered. The purpose of this thesis is to simulate pullout tests of adhesive anchorage systems for threaded rod and reinforcing bars and to emulate effects under various temperature conditions through the use of finite element analysis. Results from the finite element simulation are then compared to the physical tests conducted at UMass Amherst to determine the validity of the finite element model and to assess any notable differences in adhesive anchor performance in hot, cold, and ambient temperatures. In addition, differences in adhesive stresses when anchoring threaded rod versus reinforcing steel are evaluated.

<p>If designed and constructed properly, post-tensioned construction can provide improved durability and offers the ability to construct longer span bridges and curved girders. Furthermore, this method of construction has become economically competitive with traditional, pretensioned concrete and steel plate girder bridges. A critical issue, however, has been corrosion of the steel strand. While grouting has been the primary corrosion protection method for the strand, experience has shown that grouting presents its own problems and limitations that compromised the durability and service-life of bridges. As a result, unbonded post-tensioning has gained interest as it eliminates issues with grouting and allows for inspection as well as future strand replacement. The behavior and strength of structures constructed with unbonded post-tensioning, however, is not well understood, especially shear strength. Therefore, the objective of this research investigation is to evaluate the structural performance of prestressed girders containing unbonded tendons with a primary focus on shear strength. The scope of this phase of the research was to develop the means and methods to construct and test girder specimens with multiple design criteria and allow evaluation of multiple test variables. The research developed the materials and procedures to enable the large scale testing program to be developed. Finally, the procedures developed were verified through the construction of the initial set of test specimens and testing of the first shear specimen.</p>