型钢混凝土叠合梁滞回性能研究

为了研究型钢混凝土叠合梁的滞回性能,以混凝土强度、剪跨比和腹板截面形式作为研究参数,共设计了5个U形腹板截面和1个矩形腹板截面试件,并对这6个试件进行了试验研究。研究结果表明,剪跨比对型钢混凝土叠合梁的滞回性能影响较大,剪跨比大的试件承载力虽然低于剪跨比小的试件,但其具有更好的延性和耗能能力,且在大位移加载时刚度退化情况较为平缓,具有较好的抗震性能。混凝土强度及腹板截面形式则对型钢混凝土叠合梁的滞回性能影响并不明显。

Study on the hysteresis behavior of prefabricated steel concrete beam

In order to study the hysteretic behavior of prefabricated steel reinforced concrete beam, taking concrete strength, shear-span ratio and cross-section form of web as research parameters, a total of five U-shaped web section specimens and a rectangular web section specimen were designed. The results of test research on the six specimens show that the shear-span ratio has a greater influence on the hysteretic behavior of prefabricated steel reinforced concrete beam. Although the bearing capacity of specimens with large shear-span ratio is lower than that of specimens with small shear-span ratio, they have better ductility and energy dissipation capacity, and the stiffness degradation is more gentle under large displacement loading, so they have better seismic performance. While the effect of concrete strength and cross-section form of web on the hysteretic behavior of prefabricated steel reinforced concrete beam are not obviously.