FIRE RESISTANCE OF TUNNEL LINING USING BASALT FIBERS
Fire resistance and fire defense of tunnel concrete linings appear to be one of the most important circumstances in designing tunnels, particularly in the case of long road and railway tunnels, which can be endangered by fire due to car or train collisions. In order to prevent con-crete structure from failure due to sudden extreme high fire, different fibers are sought, which should improve the bearing capacity of the concrete lining at extreme temperatures. Basalt fibers were examined at Innsbruck University of Technology in cooperation of Czech Technical University in Prague in furnace and then using Raman spectroscopy evolution of minerals has been studied. Mathematical model was developed based on results from experiments in Prague. Numerical procedure is based on Smooth Particle Hydrodynamics Method (SPH), which application appears to be appropriate for the problem to be solved. The influence of change of temperature is involved in coupled problem of temperature on the boundary of tunnel lining, seepage and stress fields in the concrete lining and tunnel surrounding rock. The development of temperature is known from experiments, so that the course of processes in both lining and rock are derived mathematically.
Fire defense damage of tunnel linings experiments in furnace laboratory experiments on concrete properties at high temperature seepage-temperature coupled problem Smooth Particle Hydrodynamics Method boundary time-dependent conditions
P. P. Prochazka S. Peskova
Czech Technical University, Civil Engineering, department of Structural Mechanics, Prague, Czech Republic
国际会议
上海
英文
1265-1272
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）