Working State of ECC Link Slabs Used in Continuous Bridge Decks

The working states of three types of engineered cementitious composites (ECC) link slabs subjected to vertical loads are investigated based on the structural working state theory. The scattered measured strains are firstly expanded into spatially continuous data using the response simulating interpo...

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Bibliographic Details
Published in:Applied sciences 2019-11, Vol.9 (21), p.4667
Main Authors: Zhong, Junfei, Shen, Jiyang, Wang, Wei, Shi, Jun, Yang, Xiaocong, Zhou, Guangchun
Format: Article
Language:English
Subjects:
bridge deck link slab
Bridge decks
Bridges
Building codes
Concrete
Continuous bridges
Corrosion
Critical point
data expansion
Ductility
engineered cementitious composites
Flux density
generalized strain-energy density
Internal forces
Interpolation
Investigations
Mutation
Prestressed concrete
Reinforced concrete
Slabs
Structural analysis
Structural design
Structural engineering
Structural failure
Traffic control
Vertical loads
working state
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Summary:The working states of three types of engineered cementitious composites (ECC) link slabs subjected to vertical loads are investigated based on the structural working state theory. The scattered measured strains are firstly expanded into spatially continuous data using the response simulating interpolation method without loss of original information. The generalized strain energy density (GSED) is derived from these data and the sum of which are used to characterize the working states of ECC link slabs. Thereafter, the Mann-Kendall (M-K) criterion is introduced to detect the working state leaps during the whole loading procedure and two critical mutations are revealed: The yielding point and the initial structural failure point. Finally, the working state modes, the characteristics of strain fields and the development of internal forces are employed to verify the working state mutations around the revealed critical points. The GSED-based analysis of structural working state is an innovative method to discern some unseen working behavior characteristics which are ignored by traditional structural analysis theory. The work reported herein has a further effect in improving the structural design codes for ECC link slabs.
ISSN:2076-3417
2076-3417
DOI:10.3390/app9214667