Study On The Hinge Joint Model Experiment Of Hollow Slab Beam Bridge

The bridge construction business along with the development of the transportation business, is increasingly prosperous in recent years, particularly the hinge joint hollow slab beam bridge has the advantage of design in brief and convenience, easy to prepare to make, and the quick speed of starting construction, gradually occupied the middling and small size across the construction market of the path bridge. But with the gradual aggrandizement of the traffic volume, how to make bearing of hollow slab beam bridge optimized to raise the service life of the bridge, specially aimed at the study to the hinge joint hint model and state of the hollow slab beam bridge, some local scholars did the pertinence study. The study shows: it's always the hinge joint taking place the breakage before the broking occurred on bridge, and gradually formed the dramatic descend to the ability of delivering shearing force and the moment of the hinge joint, which will bring about the phenomenon of the load endured by single plank to the hollow slab beam. Therefore combine the different construction condition to choose the suitable conjunction method of hinge joint can make the hinge state of the hollow slab beam bridge get a good improvement, can consumedly raise the service life of the hollow slab beam bridge.This thesis choose three kinds of hinge joint patterns to create the experiment model respectively, they are hinge joint with concrete, transverse steel and the steel fixed on the top of the beam, the cross steel and the steel added on the top of the beam. Among them the first one will be the foundation to compare with other two patterns on the variety circumstance on improvement of delivering loads. The model experiment take class loading and unloading method to do the experiment by three kinds of junction patterns of slab beam bridge, and get the result of deformation transverse distributing,load-deformation curves,load-strain curves under the different type of hinge joint patterns. Meanwhile the correlative hinge joint slab beam theory and the method on establishing of finite model is given in brief.The study result of model experiment shows: the hinge joint patterns with cross steel is the best option in three kinds of projects considering from the transverse delivering ability of load aspect. It can improve the ability of delivering loads of hinge joint and shearing remarkably, compared with the second, the ability of delivering loads is not remarkable, this also reflect on the transverse distribution of loads. The laws of both two is essentially identical and its data fits together well after comparison on both finite analyzing and calculating and model experiment result.Although the hinge joint with transverse steel and the steel fixed on the top of the beam cannot improve the transverse distribution of loads dramatically, but it can avail to increase the integrity and shearing ability of hinge joint, reducing the crack on concrete of junction and be good at the raising durability of concrete.