Three direction quasi static test actuator connecting device

Abstract

The invention discloses a three direction quasi static test actuator connecting device which can actually reflect the true stress state of a structure under three direction seismic oscillation and has high test precision. The structure comprises a first steel ball, a second steel ball, a third steel ball and a test-piece connecting end plate. The first steel ball, the second steel ball and the third steel ball are stacked together from top to bottom, and are connected into an integral structure. A first ball hinge part which can rotate around the first steel ball and can transfer tension and pressure is arranged above the first steel ball. A second ball hinge part which can rotate around the second steel ball and can transfer tension and pressure is arranged on the side wall of the second steel ball. A third ball hinge part which can rotate around the third steel ball and can transfer tension and pressure is arranged on the side wall of the third steel ball. The test-piece connecting end plate is located below the third steel ball. The test-piece connecting end plate and the third steel ball are fixedly connected together through a test-piece connecting rod.

Description

technical field [0001] The invention relates to an instrument for testing the anti-seismic performance of a structure in the field of civil engineering, in particular to a connection device for an actuator in a quasi-static test device. Background technique [0002] Several destructive earthquakes in the 1990s, such as the Loma Prieta earthquake in the United States in 1989, the Northridge earthquake in the United States in 1994, the Great Hanshin Earthquake in Japan in 1995, and the San Francisco earthquake in the United States in 1997. The San Fernado earthquake, the Chiji earthquake in Taiwan, China in 1999, the Wenchuan earthquake in China in 2008, and the Yushu earthquake in Qinghai in 2010 all caused serious damage to local traffic and buildings, resulting in huge loss of life and property. All show the necessity, urgency and importance of seismic research on engineering structures. [0003] Pseudo-static test is the most widely used test method to study the seismic p...

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Problems solved by technology

At present, the pseudo-static test device has a one-way pseudo-static test device and a two-way pseudo-static test device. Among them, the one-way pseudo-static test device is relatively mature, and the two-way repeated loading pseudo-static test device is still developing. However, the actual seismic wave has three directional components, and the coupling effect of the three directional components plays an important role in the mechanical performance of the structure. Therefore, the one-way or two-way quasi-static test cannot reflect the structure under the actual three-way earthquake. The real force state, the test accuracy is low

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