原文传递
Adhesive Anchors in Concrete Under Sustained Loading Conditions. National Cooperative Highway Research Program.
| 题名： | Adhesive Anchors in Concrete Under Sustained Loading Conditions. National Cooperative Highway Research Program. |
| 作者： | Cook-R.A.; Douglas-E.P.; Davis-T.M. |
| 关键词： | *Loads-; *Concrete-.;Behavior-; Design-; Bond-strength; Standards-; Recommendations-; Literature-reviews. |
| 摘要： | The objective of this research was to develop a draft AASHTO standard test method to determine the ability of adhesive anchors to resist sustained tension load. The draft AASHTO test standard developed for this project is based on developing a stress versus time-to-failure interaction diagram for individual adhesive products. The interaction diagram (or simply a table) can be used to determine the percent of an adhesives short-term design strength that is acceptable for use over the life of the structure. This research was divided into several phases: literature review, development of a testing procedure, demonstration and evaluation of the testing procedure, and conclusions and recommendations. The following is a summary of the report. The current state of the art of adhesive anchors was investigated in the literature review. Extensive discussion was devoted to the behavior of adhesive anchors in concrete as well as the many factors that can affect their strength. Existing test methods for sustained load were investigated, and two approaches were identified to evaluate adhesive anchors: a pass/fail approach and a stress versus time-to-failure approach. A review of the advantages and disadvantages of the two approaches led to the development of a draft test method for the evaluation of adhesive anchors in concrete under sustained loading conditions following the stress versus time-to-failure approach. This test method was evaluated by testing two adhesives. Static load tests were conducted to determine the mean static load and two sustained load (creep) test series were then conducted at reduced loads until failure. |
| 报告类型： | 科技报告 |
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