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在工业化大生产中,使用环境对后置锚栓体系的性能和耐久性影响将直接影响工业化生产,研究后置锚栓体系的抗火性能,掌握其在温度作用下的变化规律和破坏机理,提高后置锚栓体系抗火能力就显得格外重要。通过有限元计算和试验成果整合,拟合了200℃高温下后置锚栓极限抗拔力的计算公式,并具有很好的相关性。计算表明,在200℃高温下,其极限抗拔力约为常温下进行抗拔力的1/3,与试验成果吻合。
In the industrialized large-scale production, the influence of the service environment on the performance and durability of the post-anchoring system will directly affect the industrial production. The fire-resistant performance of the post-anchoring system is studied, and the variation law and failure mechanism under the action of temperature are studied. It is very important to improve the fire resistance of the rear anchor system. Through the integration of finite element calculation and experimental results, the formula for calculating the ultimate pull-out force of post-installed anchor at 200 ℃ is fitted and has good correlation. Calculation shows that at 200 ℃ high temperature, the ultimate pull-out resistance at about room temperature under the anti-pull force 1/3, and the test results.