管道抗震支吊架振动台试验研究

Experimental study on vibration table of seismic support and hanger of pipeline

为研究管道抗震支吊架在地震作用下的低损伤特性以及薄弱环节,开展了管道抗震支吊架振动台试验研究。试验对象为依据《抗震支吊架安装及验收规程》(CECS 420∶2015)设计和安装的管道抗震支吊架,其结构体系主要由锚固件、加固吊杆、抗震连接构件、管道连接构件及抗震斜撑构成。为研究不同地震水准、地震动输入对结构动力响应的影响,采用地震加速度峰值为0.4g、0.62g的3条地震波对管道抗震支吊架的抗震性能作了综合评估。试验结果表明,该结构在振动台地震模拟测试过程中,管道抗震支吊架系统的整体结构完好,振动台地震模拟测试后,构件无裂纹,螺栓、螺母无松动、脱落,焊缝无裂纹、撕裂,连接部件无松动等现象,震后恢复性较好。因此,安装的管道抗震支吊架符合使用要求。

In order to study the low damage characteristics and weak links of pipeline seismic support and hanger under earthquake action,the vibration table test of pipeline seismic support and hanger was carried out.The test objects were designed and installed pipeline aseismatic support and hanger in accordance with the Code for Installation and Acceptance of Aseismatic Support and Hanger(CECS 420∶2015).The structural system was mainly composed of anchorage pieces,reinforcement suspender,aseismatic connection members,pipeline connection members and aseismatic inclined bracing.The influence of different seismic levels and ground motion inputs on the dynamic response of the structure was studied in the vibration table test.Three seismic waves with peak seismic acceleration of 0.4g and 0.62g were used to comprehensively evaluate the seismic performance of the pipeline anti-seismic support and hanger.The test results show that the whole structure of the aseismic support and hanger system of the pipeline is intact during the seismic test of the structure.After the seismic simulation test of the shaking table,there is no crack in the structural parts,no loosening or shedding of bolts and nuts,no crack or tear in the welds,no loosening of the connecting parts and other phenomena,and the recovery after the earthquake is good.Therefore,the installed aseismatic support hanger of pipeline conforms to the use requirement.