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10.1 导言在后张法预应力混凝土构件的锚固区或是端块中,其应力分布状态是复杂的,实际上是三向受力。在大多数预应力构件中,预应力钢丝是穿在构件中预先制造的孔道或管道中,然后预施应力,再在端面予以锚固。这样,在端块中的小面积上作用着很大的集中力。这些作用在端块上的很不均匀的力,当逐渐变换成按连续直线分布时,就产生了横向应力和剪应力。
10.1 INTRODUCTION In the post-tensioning prestressed concrete structures in the anchorage zone or the end block, the stress distribution is complex, in fact, three-way force. In most prestressed members, the prestressing steel wire is inserted into prefabricated channels or ducts in the component and pre-stressed to anchor the end face. In this way, a great deal of concentration is exerted on the small area in the end piece. These very uneven forces acting on the end blocks produce lateral and shear stresses as they are gradually transformed into continuous straight lines.