不同方向荷载作用下侧纵向抗震支吊架力学性能试验研究

Experimental study on mechanical properties of lateral longitudinal seismic bracing under different load directions

抗震支吊架是有效保护管线系统的抗震措施,为探究其抗震性能,国内外众多学者开展了一系列力学试验,但仅考虑了平行于抗震斜撑水平投影方向的受力情况,未考虑地震动的入射角度。本文通过受力分析和力学试验探究了实际工程中常用的侧纵向抗震支吊架在0°、30°、45°、-30°、-45°荷载作用下的力学性能。试验研究发现,支吊架的破坏都出现在支吊架斜撑受压的过程中,并且破坏均发生在抗震连接件上。试验结果显示,当受力方向与斜撑存在夹角时,抗震支吊架承载能力较大,当受力方向与斜撑平行时,抗震支吊架承载能力较小;承载能力试验值小于理论值。论文结合试验现象及试验数据提出了优化的侧纵向抗震支吊架的布置方式,为其工程应用提供了理论和技术支撑。

Seismic bracing is an effective seismic measure to protect the pipeline system. In order to explore its seismic performance, many scholars at home and abroad have carried out a series of mechanical tests, but only considered the force parallel to the horizontal projection direction of the bracing component, without considering the incident angle of the ground motion. In this paper, the mechanical properties of lateral longitudinal seismic bracing commonly used in practical engineering under 0°, 30°, 45°,-30° and-45° loads are explored through force analysis and mechanical test. The experimental study founds that the damage of the bracing occurs during the compression of the bracing, and the damage occurs on the connecting component. The test results show that when there is an angle between the force direction and the bracing component, the bearing capacity of the seismic bracing is larger, and when the force direction is parallel to the bracing component, the bearing capacity of the seismic bracing is smaller. The experimental value of bearing capacity is less than the theoretical value. Based on the test phenomena and test data, the optimized layout of lateral longitudinal seismic bracing is put forward, which provides theoretical and technical support for its engineering application.