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预应力SSWM-M是由高强不锈钢绞线网和砂浆组合而成的层状或者壳状预应力结构,适用于结构补强加固。为了降低施工难度和改善预应力施加状况,本文提出一种新型张拉锚固系统一嵌固锚体系,并将该技术应用于广州黄阁桥的实际加固工程中,以研究预应力SSWM-M技术的加固效果和验证嵌固锚体系的适用性。通过对比加固前后的荷载试验结果,发现:在相同荷载条件下,黄阁桥加固后挠度减小幅度大,证明预应力SSWM-M加固技术可提高原结构的刚度,减小挠度。同时依据现场施工条件,对室内构件的预应力损失计算公式进行了参数修正,并结合有限元分析验证了修正公式的有效性。
Prestressed SSWM-M is a layered or shell-like prestressed structure composed of high-strength stainless steel wire mesh and mortar, which is suitable for structural reinforcement. In order to reduce the construction difficulty and improve the prestressing application, a new type of anchoring system for tension and anchorage system is proposed in this paper. The technique is applied to the actual reinforcement project of Huangge Bridge in Guangzhou to study the reinforcement of prestressed SSWM-M Effectiveness and validation of embedded anchor system. By comparing the load test results before and after reinforcement, it is found that under the same load conditions, the deflection of the Huangge Bridge decreases greatly after the reinforcement, which shows that the prestressed SSWM-M reinforcement technology can increase the stiffness of the original structure and reduce the deflection. At the same time, according to the site construction conditions, the parameters of the prestress loss formula of the indoor component are modified. The validity of the correction formula is verified by the finite element analysis.