复材隧道逃生管道结构设计与冲击试验研究

Structural Design and Impact Test of New-Type Composite Tunnel Escape Tubes

提出了一种内、外层为玻璃钢、芯层为树脂陶粒混凝土的新型逃生管道结构,基于环刚度准则对逃生管道进行结构优化设计.首先将ABAQUS有限元软件数值模拟结果和环刚度试验数据进行了对比,验证了数值模拟的准确性.然后以减重为目标,以环刚度S≥50 k N/m2为约束,优化逃生内蒙皮、外蒙皮和芯层的厚度.最后进行了新型逃生管道的现场冲击试验.研究表明,基于环刚度准则的隧道逃生管道设计不仅能显著地降低结构重量,而且经300 kg落锤7 m高度下落冲击试验后,管道内部最小净空高度大于550 mm,可以满足施工人员低姿匍匐逃生的安全空间要求.

A new type of tunnel escape tube structures with inner and outer skins of glass fiber reinforced plastics（ GFRP） and ceramsite-resin concrete core layer was proposed. The structure was designed based on the ring stiffness criterion. Firstly,the ABAQUS simulation results of the ring stiffness were compared with the test data to verify the correctness of the former. Then,the structural weight reduction was set as the objective for optimization of the thicknesses of the inner,outer and core layers,under the condition of ring stiffness S ≥ 50 k N/m2. Finally,an impact test was conducted. The results show that the design of the tunnel escape tube based on the ring stiffness criterion can not only reduce the weight of the structure significantly,but also guarantee the pipe remaining net space is more than 550 mm after the impact by a 300 kg hammer falling above 7 meters in height,which meets the safety of crawling escape.