A device for static and dynamic multifunctional testing of supports

Abstract

The invention discloses a device for carrying out static-dynamic force multifunction testing on a support. The device comprises a main machine mechanical part, a horizontal shearing part, a vertical loading part, a corner loading part, a conveying trolley, a straight line guiding track device, an environment box, a measurement and control part and a hydraulic part. A horizontal servo actuator of the horizontal shearing part is hung horizontally and is hinged to a sliding groove in the inner side of a self-balancing stand column of the main machine mechanical part, and horizontal loading is provided for the support to be tested. The upper end of a vertical servo actuator of the vertical loading part is fixed on an upper horizontal beam of the main machine mechanical part, the lower end of the vertical servo actuator is connected with a movable horizontal beam, and vertical loading is provided for the support to be tested. The corner loading part is parallel to the vertical loading part and is fixed on the outer side of the upper horizontal beam of the main machine mechanical part, and the corner loading part is used for completing corner testing. The conveying trolley is arranged on a conveying track of the main machine mechanical part, and the straight line guiding track device is arranged on the inner side of a bearing stand column of the main machine mechanical part. The measurement and control part and the hydraulic part are connected with the horizontal shearing part, the vertical loading part and the corner loading part respectively.

Description

technical field [0001] 本发明涉及一种对支座进行静动力多功能测试的装置,主要涉及公路桥梁、铁路桥梁、房屋建筑等建设中减隔震支座和普通支座力学性能测试,可完成压缩试验、转角试验、剪切试验、剪切性能相关性试验、摩擦系数试验以及一些小型构件的力学试验等。 Background technique [0002] 近二十年来,用于桥梁减振的结构保护系统有了很大的发展,在国际上迅速发展并被广泛接受的结构保护系统包括液体粘滞阻尼器、金属摩擦摆和铅芯橡胶支座 Wait. 我国已完成或者正在建设的大型桥梁,为了达到减少桥梁各种振动的影响,也纷纷采用减隔震支座设计,如苏通大桥引桥、港珠澳大桥等。 但由于国内单位的支座检测设备仅能满足支座静态力学性能测试,无法进行动态力学性能测试,在一定程度上忽视了减隔震支座在地震作用下发挥功效的动态力学特性。 由于国内支座测试技术的滞后,这已严重阻碍了减隔震支座的发展与工程应用。 [0003] 为了保证支座产品质量,对此类产品提出严格的产品性能测试要求很有必要,这是检验产品是否达到设计要求,确保产品质量及耐久性的重要手段,是消能减震工程最为重要的环节之一。 [0004] 目前,欧美国家的规范和指南中建议减隔震支座性能测试除了需要进行竖向承载力、水平位移量、转动能力、摩擦特性等静力测试外,尚需要进行不同设计地震位移下的动态性能试验、竖向隔震动态性能试验等。但我国现有的支座试验机还不能全面、系统地满足测试要求。 [0005] 国内支座性能测试系统存在以下几个主要方面困境或缺陷:第一,目前只能进行支座的静态压剪试验,无法进行动态加载试验。水平伺服作动器进行动态加载时,需要垂向伺服作动器也处于伺服随动的控制状态。第二,支座性能测试系统自身刚度不高或者侧向承载机构摩擦力较大时,在大吨位伺服作动器作用下导致机身受力变形或者移动横梁受力较大,产生附加荷载;另外,水平伺服作动器进行剪切试验时有摩擦力过大影响试验精度的现象,造成了误差影响检测结果。第三,国内的支座性能测试系统皆未设置环境控制功能,无法真实模拟实际工程所处环境条件下的支座静动力性能,难以保证支座工作性能、耐久性及安全性。第四,垂向大吨位作动器上下运动时由于密封结构的特性,会导致导向装置以及作动器发生旋转,增加试件扭矩;另外,竖向加载时会产生的横...

AI Technical Summary

Problems solved by technology

However, the existing bearing testing machines in our country cannot fully and systematically meet the testing requirements.

[0005] The domestic support performance test system has the following main difficulties or defects: First, at present, only the static compression shear test of the support can be carried out, and the dynamic loading test cannot be carried out

Second, when the bearing performance testing system itself has low stiffness or the friction force of the lateral bearing mechanism is large, under the action of a large-tonnage servo actuator, the fuselage will be deformed by force or the moving beam will be subjected to a large force, resulting in additional load; In addition, when the horizontal servo actuator performs the shear test, there is a phenomenon that the friction force is too large and affects the test accuracy, causing errors to affect the test results

Third, none of the bearing performance testing systems in China is equipped with an environmental control function, which cannot truly simulate the static and dynamic performance of the bearing under the environmental conditions of the actual project, and it is difficult to guarantee the working performance, durability and safety of the bearing

Fourth, when the vertical large-tonnage actuator moves up and down due to the characteristics of the sealing structure, the guide device and the actuator will rotate, increasing the torque of the specimen; in addition, the lateral force generated when vertical loading is too large Make the equipment deflect and affect the test accuracy

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