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一、深梁深梁是高厚比较大、剪跨比较小的梁。其受力性能与普通梁不同,并非属于一维构件,而是更接近于二维构件。受弯前为平面的截面,受弯后不复保持平面,应力分布不再成线性。普通梁中被略去不计的剪切变形在此要大得多,并影响到受压区的应力分布,使其与普通梁的应力分布显著不同。图1表示深梁跨中截面上的应力分布情况。在荷载作用下,深梁中的裂缝常几近竖直,或沿主压应力迹线方向开展。受剪破坏时,梁几乎沿支座剪断。因此,深梁中除竖向箍筋
First, the deep beams and deep beams are beams that are taller and thicker and have smaller shear spans. Its force performance is different from that of ordinary beams, not belonging to one-dimensional components, but rather to two-dimensional components. The section that is flat before being bent does not maintain the plane after bending, and the stress distribution is no longer linear. The shear deformation that is neglected in ordinary beams is much larger here, and affects the stress distribution in the compression zone, making it significantly different from the stress distribution of ordinary beams. Figure 1 shows the stress distribution in the cross section of the deep beam. Under the action of loads, cracks in deep beams are often nearly vertical, or along the main compressive stress trace. When shear was broken, the beam was cut almost along the support. Therefore, in addition to vertical stirrups in deep beams