Study On The Whole Rigidity Of T-beam Bridge

Among the built bridges, Medium-small Span Bridges occupied the leading position. T-beam Bridge has been widely used in Medium-small Span Bridges due to its outstanding advantages. In its using process, many kinds of diseases have appeared. Bridge diseases caused by transverse connection is the most prominent which produces prodigious influence in service performance of bridges. Therefore, the integral rigidity of T-beam bridge will be studied in the paper which bases on the project entitled "Study on Improving The Whole Rigidity of T-beam Bridge", which is supported by the hebei provincial transportation department. Some references can be provided for designs of newly-built bridges or reinforcement of the old bridges. The main research of this paper are as follows:1) Backgrounding on the project of the Yongding River Bridge in Langbo Road, in Langfang city, Hebei province, finite element solid models of simply supported beams and six-span continuous beams are established by ANSYS, which consider different transverse connection condition such as hinge, semi-rigid, semi-rigid with integral layer, wet grafting and wet grafting with integral layer. Then transverse load-distributing influence lines and modal are calculated. Some significant conclusions are obtained from the calculation results.2) ANSYS program is used to establish space bar element models of T-beam bridge with three different combining methods, such as hinge, wet grafting and wet grafting with integral layer. Then the BDANS which programmed by our assignment group is used to calculate the dynamic deflection in random traffic flow. Some significant conclusions are obtained form the results.3) The correctness of the calculation model is verified by dynamic and static tests of Yongding River Bridge. So the calculated value is credible.