复合砂浆预应力钢丝绳加固实桥的试验分析

Experimental analysis of the bridge strengthening by composite mortar prestressed steel cable

复合砂浆预应力钢丝绳加固技术是一种新型桥梁结构加固技术。通过采用此技术加固的某T梁桥加固前后的静力荷载试验及有限元分析,对加固效果进行了分析。分析结果表明:加固后桥的主梁挠度和应变明显减小,加固措施有效地提高了梁抗弯承载力和刚度。同时,该加固技术可以在桥梁正常通车的情况下进行,值得在实际工程中推广应用。

Composite mortar prestressed steel cable strengthening technology is a new type of bridge structure strengthening technology. Based on a T-shaped beam bridge strengthened by this technology, the static load test and finite element analysis were carried out on two states of the structure before and after strengthening to analyze effects of strengthening. Results show that the deflection and strain of the main beam obviously decrease after strengthening and this new technology improves the bending capacity and stiffness effectively. Meanwhile, this technology can be used without affecting the bridge traffic, and it is deserved to be promoted in practical engineering.