公开(公告)号：US11946923B2

公开(公告)日：2024-04-02

申请号：US17610988

申请日：2021-02-04

Applicant: QINGDAO UNIVERSITY OF TECHNOLOGY

Inventor： Jiuwen Bao ,  Zihao Yu ,  Peng Zhang ,  Shuguo Li ,  Tiejun Zhao

IPC: G01N33/38 ,  E02D1/08

CPC classification number: G01N33/383 ,  E02D1/08

Abstract: A device and method for monitoring freezing-thawing damage of an underwater concrete member in situ. A main structure includes an upper link, concrete member, transverse sealed box, longitudinal sealed box, movable guide rod, probe launching box, multichannel data collector, frequency modulation transmitter, computer, auxiliary wheels, lower link, and a wireless temperature sensor. A process includes four steps: launching of a probe, collection of data, calculation of an elastic modulus, and evaluation of freezing-thawing damage. The device is simply structured, easy to operate, and can be reused, and provides power for launching the probe by non-contact force transmission by using high-strength magnets of the same pole, resolving the sealing problem, and calculates the elastic modulus of the concrete member by using acceleration data obtained by a probe, so as to obtain a loss amount of the elastic modulus, thereby performing real-time in-situ monitoring for freezing-thawing damage of an underwater concrete member.

公开(公告)号：US11680884B2

公开(公告)日：2023-06-20

申请号：US17057909

申请日：2020-02-14

Applicant: QINGDAO UNIVERSITY OF TECHNOLOGY

Inventor： Peng Zhang ,  Jiuwen Bao ,  Shuguo Li ,  Tiejun Zhao

IPC: G01N5/02 ,  G01N3/08 ,  G01N3/16 ,  G01N33/38

CPC classification number: G01N5/02 ,  G01N3/08 ,  G01N3/16 ,  G01N33/383 ,  G01N2203/0019 ,  G01N2203/0037

Abstract: An apparatus and a method for testing water absorption of concrete in a direction parallel with load applying direction are provided. The apparatus includes a loading device, a water filling device, and a monitoring device. The loading device includes an upper support plate and a lower support plate connected with the upper support plate via multiple threaded rods, and a space for placing a concrete specimen formed between the upper support plate and the lower support plate. The water filling device includes a water filling cylinder having a side connected with a water supply tank via an inlet pipe, and another side connected with a water storage tank via an outlet pipe. The monitoring device includes a mass sensor arranged under the water storage tank and a strain gauge for detecting change of stress of the concrete specimen.