The combined connection with welds and bolds has advantages of both welds and bolts connections, and can be widely used in reinforcing the joint in steel structure. In this paper, the Finite Element Method (FEM) was taken to analyze the carrying capacity of the combined connection with bolts and welds, and the results ware compared with those come from experimental investigation. Further analysis based on FEM ware performed to research the failure mode and bearing performance of the combined connection and the contribution of bolts and welds .Advice was provided for related design.

Analysis of slope stability based on BP neural network, the analytical model of slope stability is built. Aiming at the defects that BP neural network is likely to fall into local optimum in the progress of parameter optimization; DE is associated to put forward the DE-BP neural network prediction model that is coded by real numbers. The results show that this model has a high precision for the analysis of slope stability. It is feasible and efficient to analyze slope stability based on BP neural network.

The combined connection with welds and bolds can be widely used in reinforcing the joint in steel structure. In this paper, proposed design method of combined connection with bolts and longitudinal welds was given based on the tests and finite element analysis (FEA). The method considers the effect of the strength ratio between bolts and welds. The safety and reliability of the method were verified by FEA and comparison with other design method. The design method can contribute to the promotion of the application of the combined connections.

Using BFRPS to increase strength and durability of the structure has recently started to be used as a new technical mean. In this paper, eight BFRPS timber columns under axial compressive loads are tested, and damage characteristics and mechanical properties are studied based on the testing results. Compared with the components which are reinforced and not, the relationship between the effects of bearing factors and increasing degrees can be concluded, providing reference for the similar engineering problems.

In order to prepare energy saving and environmental protection building materials, a new kind of concrete was made by the combination of corn stalks which is the main crop in northern China, natural pumice resources and cement. Corn stalks and pumice are all lightweight material with open pores and large water absorption; therefore they must be pretreated before preparing concrete by blocking holes to reduce the amount of grout. The raw materials used in the experiments are lightweight materials; it is advisable to adopt the pressure vibration molding process to reduce aggregate stratification.