拱桥钢箱-混凝土组合受弯构件试验研究

提出了一种新型钢砼组合结构——钢箱砼组合受弯构件，该构件由钢箱梁，钢筋混凝土梁及PBH剪力连接件组合。通过对该构件的纯弯试验，研究了该构件的变形及受力性能。试验结果表明，钢箱和混凝土可以充分发挥自身的材料强度，同时避免混凝土开裂和钢材过早局部失稳等问题，是一种较理想的钢砼组合结构受弯构件形式；构件中的PBH剪力键可以很好的协调钢箱和混凝土间的变形。同时对该构件进行结构分析，分析结果与试验结果吻合良好，用同等方法进行了多种影响参数分析，得到各主要构件参数对构件受力过程的影响。该组合构件在主拱中应用时具有良好的工作性能和安全快捷的施工性能。

Experimental Analysis for Steel Box Concrete Composite Beam of Arch Bridge

A new steel concrete composite structure was proposed which composed of steel box beam, PC beam and PBH Shear connection. Bend test was carried out for the performance study of deformation and stress. It was found that Material advantages of steel and concrete were fully used and crack of concrete and local instability of steel box were avoided. And the deformation between steel box and concrete can be smoothed with PBH shear connection. As the calculated values showed good agreements with the test results, the proposed formulas can be reliably applied to the practice analysis. With the different parameters analysis, mechanic performance of the composite was obtained.