Cumulative plastic deformation measuring device

Abstract

The invention discloses a cumulative plastic deformation measuring device. The device comprises a chassis, and a displacement unit, an elastic deformation isolation gear unit, a positive and negativedisplacement separation gear group and a cumulative plastic deformation indication gear unit which are in transmission connection in sequence. The displacement unit can produce positive or negative displacement through the deformation of a measured object. The elastic deformation isolation gear unit can deduct the elastic part. The positive and negative displacement separation gear group can convert positive displacement and negative displacement into displacement in the same direction and transfer the displacement to the cumulative plastic deformation indication gear unit. The cumulative plastic deformation indication gear unit can display the cumulative plastic deformation value of the measured object. The measuring device of the invention can be used to directly measure the cumulative plastic deformation value of a component or structure under the action of external force such as earthquake, can avoid the problem that an electronic sensor may quit working due to power outage in thecase of an earthquake and is expensive, and has the advantages of simplicity, directness and reliability.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a measuring device for simultaneously measuring the accumulated plastic deformation value and the maximum plastic deformation value experienced by a structure or component under a reciprocating load. Background technique [0002] Earthquakes bring extremely serious disasters to human beings. When a strong earthquake comes, the engineering structure will bear the huge energy input by the earthquake and produce a strong structural response. The resulting partial damage or overall collapse of the structure constitutes the most important cause of earthquake disasters. factor. my country is an earthquake-prone country. Destructive earthquakes not only occur in Taiwan Island, the Qinghai-Tibet Plateau, and Xinjiang on the edge of the plate, but also are widely distributed in the interior of the mainland. Both the 2008 Wenchuan Earthquake and the 2010 Yushu Earthq...

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Problems solved by technology

[0004] At present, electronic sensors are usually used to measure the cumulative plastic deformation value and the maximum plastic deformation value. However, electronic sensors have some significant disadvantages, such as the possibility of quitting work due to power failure when an earthquake strikes, and high prices; while traditional mechanical displacement meters (such as hundreds of sub-meter), can only record one-way readings, when the displacement unit goes back and forth, the indicator needle also goes back and forth, and when measuring the deformation, it is impossible to distinguish whether the member is elastically deformed or plastically deformed, only the total deformation value can be measured

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