pier and girder in 23 damage examples and discusses the effect of cable collapse on the frequencies and model shapes of the type of cable-stayed bridges.

The acoustic emission feature of tensile fracture in UHMWPE/LDPE is studied by means of testing in the paper.

After last paper,further study on the feature of acoustic emission on tensile fracture in UHMWPE/LDPE is continued.

In this paper,deformation and failure regularities are analysed qualitatively,and a beamless floor model is established for the large area flatly inclined layered surrounding rock-mass,then the stress distribution and tensile failure condition of the surrounding rock-mass are discussed quantitatively.

The tensile failure of steel fiber concrete with a crack is studied utilizing the shear-lag model of finite sub-layers in conjunction with the linear elastic fracture mechanics.

The mechanism of tensile failure of concrete is rather complex, so there are no suita- ble or convenient mechanics models and research methods.

The experimental results show that the behavior of the shear compression failure mode is quite different from the diagonal tension failure mode although both shear failure modes are sudden and brittle.

Numerical simulation method of rock bearing tension damage;