TY - GEN
T1 - Study of local dynamic impact factor on prestressed concrete box-girder bridges
AU - Yu, Y.
AU - Ma, Y. B.
AU - Shao, Y.
AU - Deng, L.
PY - 2014
Y1 - 2014
N2 - In many bridge design codes, dynamic impact factor is used to account for dynamic effect of moving vehicles on bridges. Recent research has found that impact factors vary from location to location on a bridge, suggesting that the adoption of a uniform impact factor in the design of the entire bridge, including local structural components, may be unreasonable. Moreover, the impact factor has traditionally been derived from global responses of bridge which may be significantly different from responses on local structural components. Thus, it is necessary to examine dynamic impact factors on local structural components in order to ensure a safe design. In this study, local impact factors on prestressed concrete box-girder bridges were studied. Results show that local impact factors are greater than global impact factors in many cases and local impact factors vary with different locations, indicating bridge design codes may underestimate impact factor at local structural components.
AB - In many bridge design codes, dynamic impact factor is used to account for dynamic effect of moving vehicles on bridges. Recent research has found that impact factors vary from location to location on a bridge, suggesting that the adoption of a uniform impact factor in the design of the entire bridge, including local structural components, may be unreasonable. Moreover, the impact factor has traditionally been derived from global responses of bridge which may be significantly different from responses on local structural components. Thus, it is necessary to examine dynamic impact factors on local structural components in order to ensure a safe design. In this study, local impact factors on prestressed concrete box-girder bridges were studied. Results show that local impact factors are greater than global impact factors in many cases and local impact factors vary with different locations, indicating bridge design codes may underestimate impact factor at local structural components.
UR - http://www.scopus.com/inward/record.url?scp=84906674601&partnerID=8YFLogxK
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U2 - 10.1201/b17063-382
DO - 10.1201/b17063-382
M3 - Conference contribution
AN - SCOPUS:84906674601
SN - 9781138001039
T3 - Bridge Maintenance, Safety, Management and Life Extension - Proceedings of the 7th International Conference of Bridge Maintenance, Safety and Management, IABMAS 2014
SP - 2535
EP - 2543
BT - Bridge Maintenance, Safety, Management and Life Extension - Proceedings of the 7th International Conference of Bridge Maintenance, Safety and Management, IABMAS 2014
PB - Taylor and Francis - Balkema
T2 - 7th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2014
Y2 - 7 July 2014 through 11 July 2014
ER -