配置HRB400钢筋陶粒混凝土梁的试验

An experiment on lightweight aggregate concrete beams reinforced with HRB400

为了研究配置HRB400钢筋陶粒混凝土梁的力学性能,采用试验方法,完成了6根受弯梁的试验研究。结果表明:陶粒混凝土梁的开裂荷载大于普通混凝土梁的,极限承载荷载则和普通混凝土梁的相差不大,破坏时具有显著的脆性特征;在相同荷载作用下,陶粒混凝土梁的挠度比普通混凝土梁的大,刚度则小于普通混凝土梁的;裂缝宽度比普通混凝土梁的小。纤维的加入明显提高了陶粒混凝土梁的开裂荷载,减小了陶粒混凝土梁的裂缝宽度。

In order to study the mechanical behaviour of lightweight aggregate concrete beams rein- forced with I-IRB400, six specimens were tested. The results demonstrate that the cracking load of lightweight aggregate concrete beam is larger than that of normal concrete beam, but the ultimate loads of both beams are almost the same ; that the failure of lightweight aggregate concrete beams is brittle. Under the same loads, the deflection of lightweight aggregate concrete beams is much larger than that of normal concrete beams, which indicates a smaller stiffness of lightweight aggregate con- crete beam. The crack width of lightweight aggregate concrete beam is smaller. The mixing of fibers in lightweight aggregate concrete can significantly enhance the cracking load and reduce the crack width of the beam.