非直埋供热管道抗地震分析

Seismic analysis of non-directly buried heat-supply pipeline under earthquake action

为了保障非直埋供热管道在发生地震后的安全性、稳定性,通过分析地震危害及抗震理论,确定地震作用下管道的强度校核条件,结合典型工程案例,利用等效静力法对受到不同方向地震作用时管道的位移、应力和支架受力情况进行分析,研究表明:(1)应进行管道偶然荷载作用工况下的一次应力校核,可以保证管道在地震作用工况下的安全性和可靠性。(2)地震作用时,导向支架、固定支架Z向作用力会成倍增大,支架必须有足够的强度和刚度来确保其安全性。(3)非直埋供热管道在地震作用引起管道过大横向变形,滑动支架要采取防滑脱措施。

In order to ensure the safety and stability of the non-directly buried heating pipeline after an earthquake,the strength checking conditions of the pipeline under earthquake are determined by analyzing the earthquake hazard and seismic theory.Combined with typical engineering cases,the equivalent static method is used to analyze the displacement,stress and support stress of the pipeline under earthquake action in different directions.The research shows that:(1)The primary stress check under the condition of accidental load of the pipeline should be carried out to ensure the safety and reliability of the pipeline under the condition of earthquake.(2)In the event of earthquake,the Z-direction force of the guide support and the fixed support will increase exponentially,and the support must have sufficient strength and stiffness to ensure its safety.(3)The non-directly buried heating pipeline causes excessive transverse deformation in the earthquake,and the sliding bracket should take anti-slip measures.