When negative moment section of beams are strengthened by using carbon fiber sheets,angle iron hold-down strip is a common mechanism anchorage method.

In order to study the behavior of external prestressed beams under negative moments,two beams flexure behaviors under negative moment were tested.

In order to study the effect of web openings on the behavior of composite beams under negative moment,three perforated and one unperforated cantilever composite beams were designed and tested.

In recent years, the steel-concrete composite girder bridge is more and more applied in the continuous beam structure, the continuous bridge received the very big negative moment function in the bridge pier.

Finite element analysis on flexural loading capacity of composite slim beam with deep deck in the hogging moment region;

In this paper,a artificial neural model is made on ultimate bearing capacity forcasting of hogging moment region of continuous composite beam,learning parameters are optimized and some specimen are studied and forecasted with the model that the results is satisfactory.

Methods for controlling crack width of concrete slab in negative moment area of continuous composite bridges;

Using prestressed measures to deal with negative moment area of the continuous composite beam;

Keywords:composite beams;negative bending moment area;crack;nonlinear finite elemen

The model test results indicated that the SFRSSC composite layers may effectively decrease the moment in the negative bending moment area in the service phase and enhance the cracking moments by 51.