|Table of Contents|

Research on neutral axis location of high-strength bolts of end-plate connections(PDF)

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

Issue:
2005年03期
Page:
45-54
Research Field:
Publishing date:
2006-09-20

Info

Title:
Research on neutral axis location of high-strength bolts of end-plate connections
Author(s):
WANG Su-fang1;  CHEN Yi-yi1;  CHEN You-quan2;  WEI Chao-wen2
1. School of Civil Engineering, Tongji University, Shanghai 200092, China; 2. Zhejiang Hangxiao Steel Structure Corporation Ltd, Hangzhou 310003, China
Keywords:
end-plate connection;  high-strength bolt;  neutral axis;  theoretical model
PACS:
TU323
DOI:
-
Abstract:
In order to study the neutral axis location of high-strength bolts in extended end-plate connections, a series of joint tests from portal frame and theoretical analysis were executed. There were altogether twelve connection specimens, which including four kinds of beam sections, were tested under monotone loading. Bolt force was measured by the strain gauges affixed to notched bolt shanks. Such parameters as end-plate thickness and end-plate stiffener were introduced. Continuous beam models with spring supports were set up to model end-plate connections. By comparing the results from tests with those from model analysis, the following conclusions can be drawn: during loading process, the neutral axis moves from the centroid axis to compression zone, not exceeding the center line of bolts inside the compression flange; ultimately, the tension flange and end-plate can be simplified as T-stub on the assumption that the axial forces of bolts in tension zone are equal to each other. Simple parameter analysis by theoretical model was done to study the influence of prying force,end-plate thickness and bolt arrangement on connection behavior. Finally, available calculation methods for bolts in end-plate connections were evaluated by the analysis of test data and theoretical calculation.

References:

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Memo

Memo:
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Last Update: 2006-09-20