Cast-in Peikko HPM-L anchor bolts exposed to seismic actions (Part 2)

Figure: Peikko

Fig. 3.1: Load-displacement curves of the reference tests, according to [15] a) Series C2.1a: Tensile load

Figure: Peikko

b) Series C2.2: Shear load

Figure: Peikko

Fig. 3.2: Illustration of the results of test 1 of series C2.3, according to [15]; a) Series C2.3: Pulsating tensile load and associated displacement, test 1

Figure: Peikko

b) Series C2.3: Load-displacement diagram, test 1

Figure: Peikko

Fig. 3.3: Illustration of the results of test 1 of series C2.4, according to [15]; a) Series C2.4: Load cycles and associated displacement, V_max = 62 kN, failure after 60 load cycles

Figure: Peikko

b) Series C2.4: Load cycle displacement diagram, V_max = 62 kN, failure after 60 load cycles

Figure: Peikko

Fig. 3.4: Illustration of the results of test 1 of series C2.4 with reduced shear load, according to [15]; a) Series C2.4: Load cycles and associated displacement, V_max,red = 45 kN, failure after 60 load cycles

Figure: Peikko

b) Series C2.4: Load cycle displacement diagram, V_max,red = 45 kN, failure after 60 load cycles

Figure: Peikko

Fig. 3.5: Illustration of the results of test 1 of series C2.5, according to [15]; a) Series C2.5: Displacement values and constant permanent load over time

Figure: Peikko

b) Series C2.5: Crack widths and constant permanent load over time

Figure: Peikko

The first part of this article discussed the various test guidelines for fasteners and outlined new developments in test guidelines and the associated assessment documents for anchors and headed anchor bolts (see BFT 08/2024 for the first part). Part 2 of this article discusses the outcomes of the tests.

2.4 Assessment of the tests

2.4.1 α reduction factor

The α reduction factors applied in the C2.1 and C2.2 static reference test series are determined exclusively based on the mean maximum load-bearing capacity. The EAD defines a specific maximum bearing capacity limit value based on the mean bearing capacity for concrete breakout in tension. In shear, the mean shear capacity (steel failure) from tests with a normal crack width

(Δw = 0.3 mm) is used. Alternatively, the mean calculated bearing capacity of steel may be used.

In the C2.3, C2.4 and C2.5 cyclical test series, three criteria are...