TABLE OF CONTENTS As pointed out in Chapter 1, in the construction of various types of foundations, plate anchors are sometimes placed at an inclination to the horizontal. These anchors may be subjected to inclined or axial pull as shown in Figures 4-1a and 4-1b. However, in many cases, foundations most likely to be subjected to uplifting forces are constructed with horizontal and/or inclined anchors with the assumption that the pullout force will be transmitted axially to the anchors. This chapter is devoted primarily to a review and compilation of existing theoretical and experimental results relating to the ultimate holding capacity of inclined plate anchors subjected to axial pull.
For an inclined anchor subjected to axial pull, the gross ultimate holding capacity can be expressed as (Figure 4-1b)
| where Q u(g) | = gross ultimate holding capacity |
| Q u | = net ultimate holding capacity |
| W u | = self-weight of anchor |
Harvey and Burley (1973) made an analysis of the holding capacity of shallow inclined circular anchor plates, the details of which will be presented in this section. Figure 4-2 shows a vertical section through the assumed failure zone corresponding to the major axis of the ground surface failure ellipse. The diameter of the circular anchor is equal to h. The anchor is inclined at an angle ? with respect to the horizontal, and the...
