The result shows that the direction of principal compressive strain axis of each sub-plate is generally consistent with the P-axis of earthquake focal mechanism solutions and the direction of principal compres- sive stress axis deduced from geological analysis.

Ductility ratio and strain energy that are regarded as the characteristic parameters of ductility and toughness were calculated from axial stress-strain curves of plain concrete and HDPE-pipe concrete.

In this testing research,we prepared a series of High Performance Recycled Aggregate Concrete(HPRAC)with recycled aggregate and tested their uniaxial compressive stress-strain behavior,which will provide theoretical foundation for numerical analysis of Recycled Aggregate Concrete(RAC)structure.

Study of dynamic pore water pressure and axial strain in saturated sand-gravel composites;

A new type of test method called multi-spots axial strain sensor was elaborated,the development conception and test principle were also introduced.

Then,the sand liquefaction process is divided into four phases according to the different behavior of hysteresis loop,during which the development characteristics of axial strain are analyzed.