Parameter Identification And Dynamic Compound Inverse Analysis Of Multi-ribbed Slab Structure

With the development of society, the health monitoring of civil engineering structure has attracted great attention of people. And the dynamic properties detection of building structure is an important way to evaluate the health condition of structure. Consequently, the vibration characteristic of a new structural system—Multi-ribbed Slab Structure is researched in this paper. The theoretical analysis methods, such as dynamic detection and parameter identification, are studied and discussed on. Based on the dynamic compound inversion analysis, the security and reliability of Multi-ribbed Slab Structure is evaluated. The main contents are as follows:(1)Through analyzing identification results of time domain method and frequence domain method contrastively, the weighted least-squares identification SISO which is a actual, feasible and effective parameter identification method for Multi-ribbed Slab Structure is presented.(2)According to the analysis on mechanics properties of compound material, with the dynamic properties of the structure unchanged , homogeneity equivalence is performed on the multi-ribbed slab wall and the effective elastic model that is simple, practical,and convenient for Multi-ribbed Slab Structure is established, which simplifies the elasticity analysis of structure.(3)On the basis of the practical engineering and modal parameters modified values of structure obtained from the dynamic detection experiment as well as the analytical results of the above effective model, the least-square Method, as the physical parameter identification of Multi-ribbed Slab Structure, is given.(4)Summarizing the above results of parameter identification and reconstructing the structural dynamic information , structural dynamic equation is established , parameter identification and dynamic compound inverse methods with unknown inputs of the structural basement or with incomplete information is put forward; Combining the engineering examples, based on inverse analysis, the practical elastic story stiffness of Multi-ribbed Slab Structure is gained thus, conversion formula for elastic story stiffness of Multi-ribbed Slab Structure is built.(5)The evaluation methods of the security and reliability of existing Multi-ribbed Slab Structure is discussed preliminarily.