论文部分内容阅读
钢绞线(丝)网-聚合砂浆加固技术是一项新型加固工艺,具有耐火、耐腐蚀、耐老化、施工速度快等优点,已被逐渐应用于钢筋混凝土结构的加固补强中。采用该技术抗弯加固钢筋混凝土梁的受力性能可分为三个阶段:未裂阶段、裂缝阶段和破坏阶段。已有研究多数集中于加固混凝土梁正常使用阶段的抗弯性能分析,对受力纵筋屈服后破坏阶段的抗弯性能分析则鲜有涉及。该文在以往试验研究的基础上,采用换算截面法计算加固钢筋混凝土梁屈服阶段和极限阶段的等效刚度,对加固梁在集中荷载作用下抗弯性能全过程进行受力分析,并通过10根加固梁的试验数据对其验证,吻合良好。
Strand (wire) mesh - polymer mortar reinforcement technology is a new type of reinforcement technology, with fire-resistant, corrosion-resistant, anti-aging, construction speed and other advantages, has been gradually applied to the reinforcement of reinforced concrete structures. The mechanical behavior of RC beams strengthened by this technology can be divided into three stages: uncracked stage, cracked stage and damaged stage. The existing research mostly focuses on the analysis of flexural behavior of reinforced concrete beams in normal use stage, and little analysis on the flexural behavior of the reinforced concrete beams in yielding stage after yielding. Based on the previous experimental studies, the equivalent cross-section method is used to calculate the equivalent stiffness of the yielding and ultimate stages of reinforced concrete beams. The stress-bearing behavior of the reinforced beams under the concentrated load is analyzed by using 10 Root reinforcement beam test data to verify that, in good agreement.