受纯扭钢筋混凝土组合截面梁的试验研究

本文根据４７根受纯扭Ｔ形、Ｌ形和Ｉ形梁的试验结果，分析研究了钢筋混凝土组合截面梁，特 别是Ｔ形梁的破坏形态、抗裂性、强度和刚度等性能，提出了钢筋混凝土组合截面梁的刚度、开 裂扭矩和极限扭矩的计算式．验算了国内外５４根钢筋混凝土Ｔ、Ｌ和Ｉ形梁，计算结果与实测值吻 合程度较好．

RESEARCH IN THE REINFORCED CONCRETE BEAMS WITH COMPOUND SECTIONS UNDER PURE TORSION

In this paper, basing on the testing results of 47 T-, L-, and I-shape beams, the auther analyzes and studies the behaviours of failure scheme, crack, strength, and stiffness of reinforced concrete beams with compound section s under pure torsion. Consequently, the formulas for calculating stiff- ness, cracking torque and ultimate torque of such beams are proposed. After making checking calculations with the formulas, of the 54 T-, L-, and I-sec- tion beams that were previously tested by some people at home and abroad, the results thus obtained agree quite well with our experimental ones.