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6866294 
Journal Article 
Topology optimization of continuum structures with different tensile and compressive properties in bridge layout design 
Liu, S; Qiao, H 
2011 
Structural and Multidisciplinary Optimization
ISSN: 1615-147X
EISSN: 1615-1488 
43 
369-380 
Dual extension/compression modulus; Heaviside function; Topology optimization; Bridge layout design