海水喷淋干湿循环持载RC受弯梁试验研究

发布时间：2018-03-31 17:50

  本文选题：海水喷淋干湿循环　切入点：持续荷载　出处：《北京工业大学学报》2017年12期

【摘要】：为了解决沿海地区正常使用工作状态下承受较大持续荷载钢筋混凝土(reinforced concrete,RC)梁的力学性能劣化问题,通过实验室模拟经历180 d大气环境+180 d海水喷淋干湿循环(简称Ⅰ腐蚀)或180 d海水喷淋干湿循环+180 d大气环境(简称Ⅱ腐蚀)后,由静力加载试验测试RC梁试件力学性能劣化规律.试验结果,RC梁试件在不同持续荷载和一定腐蚀环境共同作用下,随着持续荷载增大其屈服荷载P_y、极限荷载P_m和延性系数u降幅变大.Ⅱ腐蚀梁试件的P_y、P_m和u降幅大于Ⅰ腐蚀梁试件的P_y、P_m和u降幅.梁试件的抗弯刚度随着持续荷载增大而降低.试验结果表明较大持续荷载与一定腐蚀环境共同作用对RC梁力学性能劣化影响明显.
[Abstract]:In order to solve the problem of deterioration of mechanical properties of reinforced concrete reinforced concrete reinforced concrete (RC) beams under normal working conditions in coastal areas, After 180 d atmospheric environment 180 d seawater spray dry and wet cycle (I corrosion) or 180 d seawater spray dry wet cycle 180 d atmospheric environment (II corrosion for short) were simulated in laboratory. The degradation rule of mechanical properties of RC beam specimens was tested by static loading test. With the increase of yield load, the decrease of ultimate load Pm and ductility coefficient u becomes larger. 鈪，

本文编号：1691794