共进行了2根采用 HRB500级高强钢筋和1根 HRB335普通钢筋混凝土连续梁的受弯性能试验研究及有限元分析。研究结果表明：高强钢筋混凝土连续梁在裂缝发展规律、截面应变分布、塑性铰出铰顺序和破坏形态等方面与普通钢筋混凝土连续梁基本一致。但高强钢筋混凝土连续梁的跨中屈服荷载、中支座屈服荷载和极限荷载均较普通钢筋混凝土连续梁明显提高，分别提高28．7％、22．8％和30％；构件延性有所提高，提高幅度为8．1％。有限元分析结果与试验结果吻合较好，精度符合工程精度要求。%The flexural behavior of two reinforced concrete continuous beams with HRB500 bars and one RC continuous beam with HRB335 bars was experimentally studied.And the numerical analysis was also conducted by using the FEM software.Test results indicated that the crack progression,the sectional strain distribution,the sequence of plastic hinges and the failure mode were almost the same for all three specimens. But the yielding load at the midspan,the yielding load at the mid-support,the ultimate load and the ductility factor of RC continuous beams with high-strength steel bars had a 28.7%,22.8%,30% and 8.1% increase respectively than that of RC continuous beam with normal-strength steel bars.The predictions of finite element analysis were in good agreement with the test results and can satisfy the engineering use requirement.
展开▼
