Analysis Of Prestressed Concrete Simple-Continuous Multi-Box Beam Bridge And Its Experimental Research

In this paper, existing methods for calculating load transverse distribution coefficients of simple supported multi-beam bridge is recommended. And based on classical load transverse distribution theory, 2-d and 3-d finite element method is introduced and rigidity matrix, load matrix and correlative calculating formulas are presented. And in this paper, Gao-li bridge is studied as an example project, and based on the characteristic of prestressed concrete continuous multi-box bridge, the bridge is analyzed as a 2-d structure rather than a 3-d structure by the load transverse distribution theory. By applied with elastically supported continuous beam method and compared with rigid connected plate method and finite element method are both applied, the comparative analytical calculation and the experimental research are analyzed. The result indicated that the theoretical calculating result is accordant with the result of experimental test.This paper also introduced the construction method, construction technic, quality control measure and the construction key of the structure system change of the simple-continuous beam bridge. And by experiment and analysis, the characteristic of cement concrete intensity changing with its age is studied, and the influence factor of the cube compression strength of cement concrete is discussed, then some explicit measure and means of cement concrete quantity control is presented.