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前言钢筋混凝土偏心受压构件是工程结构中经常遇到的构件之一。这类构件除受轴向压力和弯矩作用之外,往往还要受到横向剪力的作用,例如承受节间荷载的屋架上弦、排架柱、框架柱及双肢柱等。在一些屋架试验中,曾观察到上弦发生剪切破坏的现象;在震害调查中,柱的剪切破坏现象比较普遍也比较严重。因此,钢筋混凝土偏心受压构件的抗剪强度问题,已经日益受到人们的关注。在国外,对钢筋混凝土偏心受压构件的抗剪强度,已经进行过不少试验研究,有的已在设计规范中得到反映。我国现行设计规范(TJ 10—74)仅对受弯构件的抗剪强度做出了规定。自1978年以来,国内已对这一课题进行了试验研究,并对偏心受压构件的抗剪强度提出了与现行设计规范的抗剪强度相衔接的计算公式。资料[4]主要是对定轴力、横
Foreword The reinforced concrete eccentric compressive member is one of the components often encountered in the engineering structure. In addition to the axial pressure and bending moment, these members are often subjected to lateral shear forces, such as truss chords, bent columns, frame columns, and double-limb columns that are subjected to interstage loads. In some roof truss tests, the phenomenon of shear failure in the upper chord has been observed; in the seismic damage investigation, the column shear failure phenomenon is relatively common and serious. Therefore, the shear strength of reinforced concrete eccentric compression members has attracted increasing attention. In foreign countries, a number of experimental studies have been conducted on the shear strength of reinforced concrete eccentric compression members, and some have been reflected in the design specifications. The current design specification (TJ 10-74) in China only provides for the shear strength of flexural members. Since 1978, this subject has been experimentally studied in China, and the formula for the shear strength of eccentric compression members is proposed in conjunction with the shear strength of current design specifications. The data [4] is mainly about the axial force, horizontal