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在实际工程中,钢筋混凝土结构中的梁柱构件都配置箍筋。因而,受压混凝土在箍筋约束下的应力一应变全曲线是研究结构抗震延性和非线性全过程分析的主要依据之一。作者在研究素混凝土的工作基础上,对不同配箍率的约束混凝土在反复荷载下的应力一应变全曲线进行试验研究,提出相应的曲线方程。一、主要试验结果试件为100×100×300毫米棱柱体,全部试件共26组58个。混凝土设计标号为500号
In the actual project, the stirrups are arranged in the beam and column members in the reinforced concrete structure. Therefore, the stress-strain curve of confined concrete under the constraint of stirrups is one of the main bases for the study of seismic ductility and non-linear full-process analysis. On the basis of studying the work of plain concrete, the author conducts experimental research on the stress-strain full curves of confined concrete with different loading rates under repeated loading, and proposes corresponding curve equations. First, the main test results are 100 × 100 × 300 mm prismatic specimens, a total of 26 sets of all 58 specimens. Concrete design number 500