尚庆学, 李泽, 刘瑞康, 王涛. 管线系统抗震支架力学试验研究[J]. 工程力学, 2018, 35(S1): 120-125,133. DOI: 10.6052/j.issn.1000-4750.2017.06.S021
引用本文: 尚庆学, 李泽, 刘瑞康, 王涛. 管线系统抗震支架力学试验研究[J]. 工程力学, 2018, 35(S1): 120-125,133. DOI: 10.6052/j.issn.1000-4750.2017.06.S021
SHANG Qing-xue, LI Ze, LIU Rui-kang, WANG Tao. Experimental study on properties of aseismic braces used in pipe line systems[J]. Engineering Mechanics, 2018, 35(S1): 120-125,133. DOI: 10.6052/j.issn.1000-4750.2017.06.S021
Citation: SHANG Qing-xue, LI Ze, LIU Rui-kang, WANG Tao. Experimental study on properties of aseismic braces used in pipe line systems[J]. Engineering Mechanics, 2018, 35(S1): 120-125,133. DOI: 10.6052/j.issn.1000-4750.2017.06.S021

管线系统抗震支架力学试验研究

Experimental study on properties of aseismic braces used in pipe line systems

  • 摘要: 震害表明,支撑和悬吊系统破坏是管线系统失效的主要原因。该文首先针对悬吊管线系统较为常用的钢缆式、梁夹式、螺杆式三类抗震支撑进行了9组拟静力试验,通过易损性分析确定了FM1950位移限值下各类抗震支撑的极限承载力,并将其转化为响应加速度指标。三类支撑中螺杆式抗震支架的承载力最高,应用最广泛,故针对采用不同直径螺杆(12 mm、16 mm)的此类抗震支架,按照FEMA461的相关规定补充进行了6组拟静力试验,发现吊杆直径对此类支架的抗震能力影响不大,吊杆直径较小的抗震支架具有更大的变形能力。

     

    Abstract: Recent earthquakes have demonstrated that the damage of bracing and suspension components is the major reason to the failure of piping systems. This paper presents the results of nine sets of quasi-static tests on three types of aseismic braces by use of the load protocol provided by FM1950. The three types of braces include the steel wire brace, the beam clamp brace, and the threaded rod brace. The ultimate capacity corresponding to the limit displacement of FM1950 protocol was determined by the fragility analysis and further transformed to the response acceleration of pipe line systems. The threaded rod brace is the one having the highest bearing force among the three types of braces, and also the one most widely used. Therefore, another six sets of quasi-static test on two types of threaded rod braces respectively with 12mm and 16mm diameter hangers were further conducted following the FEMA461 protocol to investigate the size effect of the threaded rod brace. It is found that the size of hangers has little influence on the aseismic performance of threaded rod braces, while those with smaller hangers have larger deformability.

     

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