and analyzed the destruction mechanism of carbon fiber RPC and the fiber enhancement mechanism to RPC,and do the eight fiber(reinforcing steel) well covers,and research its mechanical properties with the static load(the recurrent load) and practicality properties and oppointed them applicability comparing criterion .
Because there is close correlation between the static load and dynamic load,and the methods of determining a single grain can show the strength distribution of determined grits,so the static load strength of a single grain is more effective and practical.
The present study investigates three main points of the unanchored large storage tanks by finite element analysis, including structure-foundation contact under static load, elephant foot bulking, and seismic response using FSI(fluid-structure interaction) model.
Acoustic emission signals induced by microcrack initiation and subcritical crack propagation understatic load are obtained by means of the acoustic emission transducer. The relation between the time of applicationof the static load and the acoustic emission rate dN/dt induced by microcrack initiation and subcritical crackpropagation is studied.
It is observed that the variation of the acoustic emission signals which occur about 20～30s before fracture caused by subcritical crack propagation is different obviously,The smaller the static load is,the longer the period from the time of the first signal induced by subcritical crack propagation to the occurrenceof fracture.