论文部分内容阅读
火灾高温会使盾构隧道管片衬砌的力学性能产生劣化,其受力变形也较常态下更为复杂。考虑到火灾下衬砌截面温度场的真实分布情况以及管片材料高温下力学性能的非线性,建立了高温下圆形衬砌变形的理论计算模型;针对盾构隧道管片衬砌,基于自由变形理论,得到了其高温下变形的解析解;根据具体算例得到了发生火灾时管片变形规律,为管片火灾下的防火设计提供了理论依据,并将计算结果与设计规范相对比,对灾后隧道内人员财产救援进行的时机给出了建议。
The high temperature of fire will degrade the mechanical properties of the shield tunnel segment lining, and its deformation under stress is more complicated than that under normal conditions. Considering the real distribution of the temperature field in the lining of a fire and the nonlinearity of the mechanical properties of the material at high temperature, a theoretical calculation model of circular lining deformation under high temperature is established. According to the theory of free deformation of shield tunnel, The analytical solution of the deformation under high temperature is obtained. According to the concrete example, the deformation rules of the pipe during the event of a fire are obtained, which provides a theoretical basis for the fire protection design of the pipe in the event of a fire. The calculated result is compared with the design code, The timing of the rescue of staff inside property is given.