doi:10.3850/978-981-08-7920-4_S2-S33-cd

ABSTRACT

Double steel and concrete composite continuous beam is a new type of composite structure. The top concrete slab will crack under tension in the negative bending region. It is modeled as a plane problem and analyzed by the FE software ANSYS for the tested 2-span double steel and composite continuous beam specimen with full shear connection in this paper. The effect of the interface bond and slip between concrete and steel is expressed by nonlinear springs of null dimension at the node, and the concrete under tension is assumed as a tensile strain softening material. The whole process from loading to collapse is simulated for the specimen by using APDL language, in which the tension crack width is computed by the relative displacement change of the neighbor joints. There is a good agreement by comparing of the crack location and width between the numerical simulation and the test measurement. It also shows the thickness of the bottom concrete slab is effective to control the crack width in the negative bending region.

Keywords: Double steel and concrete composite beam, Negative bending region, Crack width, Tensile strain softening, FE simulation, APDL.

© 2011 Research Publishing Services. All rights reserved.