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一、前言按照现行《钢筋混凝土结构设计规范TJ10-74(试行)》(以下简称《TJ10-74》),当必须考虑锚固区预应力钢筋的强度折减,来计算先张法预应力混凝土受弯构件端部锚固区正截面的预应力受拉钢筋面积时,往往在锚固区计算几个截面,采用其中要求最大的配筋面积A_y值.这种做法,不仅费时,而且不够准确.本文就缓慢放松和骤然放松施工工艺,探讨
I. INTRODUCTION In accordance with the current “Design Specification for Reinforced Concrete Structures TJ10-74 (Trial)” (hereinafter referred to as “TJ10-74”), when the strength reduction of the prestressed steel bars in the anchorage zone must be considered, the pretensioned prestressed concrete is calculated by the pretensioning method. When the prestressed area of the anchor section of the bent section is prestressed by the area of the rebar, several sections are often calculated at the anchorage area, and the required area A_y of the reinforcing bar is used. This approach is not only time consuming, but also not accurate enough. Slowly relax and suddenly relax the construction process and explore