Pseudo-Dynamic Substructure Testing Method For Structures

The pseudo-dynamic substructure testing is an experimental technique for simulating the seismic response of structures and structural components. The substructure method can be described as follows: A structure is divided into two substructures, one of which is expected to remain linear during loading and can hence be modeled well using numerical methods. The second substructure is expected to behave non-linearly during loading and is tested at full or large scale in the laboratory. The numerical model is used to calculate the displacements and rotations at the interface between the two substructures due to some external loading, such as ground accelerations, using a time stepping routine .The displacements and rotations are then applied to the physical substructure using a set of servo-valve correct boundary conditions, The resulting forces and moments at the substructure interface are then measured and fed back to the numerical model.In this paper, we focus on the discrediting a continuous numerical model for use in time stepping routines for structural analysis: explicit method as the central deference method (CDM),the predictor-corrector-Newmark method and theα-method (implicit) are introduced in this paper. In pseudo-dynamic substructure testing, theα-method (implicit) is an efficient and powerful means for simulating the earthquake response behavior of structures. A number of new testing techniques and numerical schemes have been developed to improve the efficiency and reliability of the pseudo dynamic testing method using theα-method (implicit).We also focus on the errors in the pseudo-dynamic substructure testing. First of the errors come from the accuracy of the Laboratory equipments, the second errors come from the numerical integration method, the third errors come from the assumption which the numerical substructure remain linear during loading. The first and the second errors, we can improve the new Laboratory equipments to make sure these errors can not effect the stability and accuracy of the pseudo-dynamic substructure testing. We not effect the stability and accuracy of the pseudo-dynamic substructure testing. We also can use the finite element (FEM) software to analysis the complete structure, and then we can understand the structure's Physical properties. We can surely understand which part of structure behaves non-linearly during loading.We also are looking forward the better developing testing software. In the future, we can model the numerical substructure more precise. We can develop the testing software under the finite element (FEM) software.