Anchor Displacement Behavior during Simultaneous Load and Crack Cycling

作者：Mahrenholtz Philipp; Eligehausen Rolf

来源：ACI Materials Journal, 2016, 113(5): 645-652.

DOI：10.14359/51689109

• concrete anchor
• cumulative damage
• displacement behavior
• headed bolt
• seismic actions
• simultaneous load and crack cycling

Anchors used in seismic applications have to resist cyclically pulsating loads and cyclically opening and closing cracks which potentially intersect the anchor location. In reality, cyclic load and cyclic crack phenomena act on anchors simultaneously; however, seismic tests in laboratories are carried out with either one of the two parameters kept constant. To investigate the effect of simultaneous load and crack cycling on anchor behavior, experimental tests with synchronized load and crack cycling protocols on headed bolts cast in special concrete specimens were carried out. The test results demonstrate that the anchor displacement depends on the phasing of load and crack cycling, and justify the reduction of the constant anchor load during simulated cyclic crack tests to compensate for disregarded load cycling effects. The influence of various phase lags and different frequencies on the relative anchor displacement is described by an analytical model based on the integrated cumulative damage regime.

• 出版日期2016-10