|Table of Contents|

Study on shock absorption measures of stepped pipe gallery under non-uniform earthquake excitation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年05期
Page:
206-215
Research Field:
岩土工程
Publishing date:

Info

Title:
Study on shock absorption measures of stepped pipe gallery under non-uniform earthquake excitation
Author(s):
ZHAO Xiaobin1; 2;  REN Qing2;  YANG Tao2;  DENG Haiming2
(1. Shandong Taishan Construction Engineering Development Group Co., Ltd, Jinan 250000, Shandong, China; 2. Department of Civil Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)
Keywords:
stepped pipe gallery;  non-uniform excitation;  shock absorption measure;  dynamic response
PACS:
TU924
DOI:
10.19815/j.jace.2021.11088
Abstract:
Based on the method of finite element analysis, the three-dimensional finite element model for the interaction of pipe gallery-soil structure was established. Through modal analysis, the natural vibration frequency and deformation characteristics of three different joint forms of stepped underground integrated pipe gallery were obtained, which verified the rationality of the model. Under the non-uniform excitation condition of small earthquake, the dynamic response of three different pipe gallery joints of flat, tongue-and-groove and cast-in-situ under the combined action of haunching and damping layer was studied. The results show that the haunching reduces the stress level of the pipe gallery body and joint by about 10%, and reduces the axial stress of the pipe gallery roof of the three joint forms by 50%-70%. When the haunching height is increased from 300 mm to 600 mm, the stress reduction at the flat pipe gallery joint is doubled, but it has little effect on the tongue-and-groove and cast-in-situ joints. The stress level of stepped multi bin pipe gallery with haunch and damping layer is reduced by about 20%, but it has little effect on the displacement of roof axis and the relative displacement of joints. The joint action of haunching and damping layer has different effects on the reduction range of the first and third principal stresses of pipe gallery with different joint forms. The reduction range of cast-in-situ joint is about 30%, that of flat joint is about 20%, and that of tongue-and-groove joint is less than 10%.

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Last Update: 2023-09-01