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研究证明,纵向压力对构件沿斜截面的强度有很大影响。当纵向压力作用于截面中心时,则对受横向力作用的构件强度起积极作用;当纵向压力作用线偏离中心时,则使构件沿斜截面强度受到影响。显然,这不仅取决于纵向压力,而且还与相对偏心距的符号和数值有关。为了揭示各种因素对构件斜截面强度的影响程度,对矩形截面的重砼试件进行试验。试件尺寸为15×30×240cm,砼试块强度为20～30MPa,纵向配筋为A-Ⅲ级钢筋,其直径为16、20、25和28mm。箍
Studies have shown that the longitudinal pressure has a great influence on the strength of the member along the oblique section. When the longitudinal pressure acts on the center of the section, it will have a positive effect on the strength of the member affected by the lateral force; when the longitudinal pressure is off-center, the strength of the member will be affected along the oblique section. Obviously, this depends not only on longitudinal pressure but also on the sign and value of relative eccentricity. In order to reveal the degree of influence of various factors on the strength of the oblique section of the member, a test was conducted on a rectangular cross section specimen. The test piece size is 15×30×240 cm, the strength of the rammer test block is 20 MPa to 30 MPa, and the longitudinal reinforcement is A-III grade steel bar with diameters of 16, 20, 25, and 28 mm. hoop