Cyclic loading tests

Martin et al. (1975) has given procedures to evaluate these two parameters from the results of static rebound tests in a consolidation ring and cyclic load tests on dry sand, respectively. Finn and Bhatia (1981) has also reported good agreement between predicted and measured values using the proposed method. 

Nauroy, J. R, Brucy, F, and Le Tirant, P. (1985), Static and cyclic load tests on a drilled and grouted pile in calcareous sand, BOSS, pp. 577-587. 

The inability of the static creep test to simulate the real loading conditions on site and to reflect better the improved performance of binder modifiers led to the establishment of the dynamic (cyclic) loading test at the beginning of the 1980s (Finn et al. 1983 Valkering et al. 1990). 

Type J-BI-18 specimen has the bent in joint bar anchorage details with 18 mm diameter flexural reinforcement for beam and column. Figure 13.14 shows the load and displacement relationships for J-BI-18 specimen for both push and pull directions. Specimen J-BI-18 was designed for the beam flexural capacity of 137 KN. However, as shown in Fig. 13.14, it collapsed at 99 KN in a joint failure mode in shear. Figure 13.15 represents the formation of crack in joint during the cyclic load test. 

In the present paper, the electrically conductive composites having continuous structure of conductive particles with the continuous or network structure, were designed and fabricated in the FRP and the CMC. These self-diagnosis functions were evaluated from the measurement of resistance changes with applied strain in normal or cyclic loading tests. The practicability of the function was examined in bending tests for mortar specimen embedding FRP. Percolation phenomena with the second phase of various aspect ratios were also studied by two-dimensional computer simulation. 

FIGURE 17.1.3 Change in resistance (solid line) and applied strain (dashed line) as a function of time in cyclic loading tests for the CFGFRP. 

A number of tests are possible to evaluate the behavior of soils under dynamic loads such as wave or earthquake loads. Dynamic tests generally are strength tests with the sample subjected to some sort of cyclic loading. Tests can be performed to evaluate variations of strength, modulus, and damping, with variations in rate and magnitude of cyclic stresses or strains. Small strain parameters for earthquake loading cases can be evaluated from resonant column tests. 

The parameters for the damage and restoring force models would have to be specified for a given type of masonry. To illustrate the use of these models for damage assessment, the model parameters will be determined for unreinforced brick masonry. For this purpose, the cyclic load test results reported in Zhu (1980), Ref. 7, and Xia (1986) are used. Compressive strengths of the masonry units are between 75 and 100 kg/cm, whereas the mortar strengths range from 5 to 50 kg/cm. ... 

A typical cyclic loading test performed with a shape memory polyurethane cast film is shown in Figure 14. The shape retention and recovery are over 90% for the first cycle, N = 1. The shape retention increases and the shape... 

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