The study includes several important issues of earthquake-resistance measure,such as selection of reinforcement types, influence of temperature variation of concrete adjacent to steel bars,location,arrangement and quantity of steel bars on both sides of contraction joints,etc.

Study on effect of damper between contraction joints on seismic response of the high arch dam;

The seismic resistance of Xiaowan arch dam,where the contraction joints are considered based on substructure theory,is analyzed.

The paper analyzed the seismic resistance of XIAOWAN arch dam in which the effect of contraction joints to high arch dam were considered.

Application Research of Morphological Feature and Neural Network in Wood Across-compression;

For compression in the direction perpendicular to woven plane(transverse compression),the maximum compressive stress of the matrix is found to occur at the interlacing junctions of the fiber yarns,which tends to make it failure.

According to elastic theory, this paper gives quantitative answers of stresses and deformations caused by the lateral contraction of longitudinal welding seam on the thin wall's cylinder.