供热管道地震易损性分析

为了研究供热管道的地震易损性，采用有限元分析方法，建立了典型供热管道分析模型，选取典型地震波作为输入，通过数值模拟手段，对供热管道在地震作用下的应力反应进行了计算分析。基于三态破坏准则对单体管道地震破坏概率进行了分析，给出了供热管道不同地震烈度下的破坏概率。根据管道破坏服从泊松分布的基本假定，对不同烈度下一定长度供热管道地震破坏处数进行了估计，同时与历史地震中管道震害经验统计结果进行了对比分析，初步评述了供热管道的抗震性能。

SEISMIC VULNERABILITY ANALYSIS OF HEAT SUPPLY PIPELINE

In order to study the seismic fragility of heat supply pipeline, the method of finite element analysis is adopted to develop a typical model of heat supply pipeline. Selecting some typical seismic waves, by means of numerical simulation, the earthquake response of heat supply pipeline is analyzed. Besides, based on a tristate failure criterion, the failure probability of a single pipe is analyzed and the failure probability of a heating supply system under different earthquake intensities is summarized. According to the assumption of Poisson distribution for pipe damage, the damage number of a certain length of heat supply pipeline is also estimated and compared with the statistical data of seismic damage of pipeline, and the aseismic performance of heat supply pipeline is preliminary evaluated.