|Table of Contents|

Conceptual Design and Construction Measures of Small-to-medium Span Bridge Seismic(PDF)

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

Issue:
2022年02期
Page:
30-35
Research Field:
Publishing date:

Info

Title:
Conceptual Design and Construction Measures of Small-to-medium Span Bridge Seismic
Author(s):
WANG Ke-hai1; 2;  ZHANG Bing-zhe2;  GUO Wei-zuo2
(1. Research Institute of Highway Ministry of Transport, Beijing 100088, China; 2. School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China)
Keywords:
bridge seismic;  conceptual design;  structural measure;  shear key;  laminated rubber bearing
PACS:
U442.55
DOI:
10.19815/j.jace.2021.06075
Abstract:
To improve the seismic performance of small-to-medium span bridges, the reasonable seismic conceptual design and appropriate structural measures were expounded by summarizing the seismic damage of Qinghai Maduo earthquake and Wenchuan earthquake. Based on the bridge seismic concept of “multiple defenses, graded energy consumption” and “one can and three easy(the damaged part and degree of damage can be controlled, the damaged part or member can be easily inspected, repaired, and replaced)”, the seismic conceptual design of bridge with bearing as “fuse-type unit” was suggested. Considering that the small-to-medium span simply supported bridges were prone to damage caused by falling beams, the seismic structural design methods of appropriately increasing the width of bent cap and setting double-layer block transversely were proposed. It was recommended that the seismic design and seismic evaluation of the bridge should be unified with seismic structural measures and the seismic design of bridge should not be divided according to intensity or basic ground motion prarameter. The reasons for the different earthquake damages of adjacent bridges with similar structures in Maduo earthquake were summarized and analyzed from the perspective of the basic period of the structure and the frequency spectrum components. The research findings can provide reference for seismic design and evaluation of similar engineering.

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Last Update: 2022-03-20