On-Site Experimental and Numerical Investigations of Latticed Girder Composite Slabs

Abstract

In this study, on-site bending experiments which represented realistic and pragmatic engineering applications were performed to investigate the resistance, deflection, and cracking process of latticed girder composite slabs. Then, utilizing ABAQUS software, nonlinear finite element (FE) models were established to investigate the behavior of the slabs. The modeling took into account the contact between the precast and cast-in-place concrete interfaces. Additionally, a damage-cracking methodology was introduced to evaluate the crack opening width of the slab. The results demonstrated that the proposed numerical model was capable of reproducing the typical behavior of the composite slabs’ performance analysis. The experimental and numerical results demonstrate that the lattice girder composite slabs conformed to the requirement of existing design codes.

Investigations on Interface Shear Fatigue of Semi-Precast Slabs with Lattice Girders

“…Because of their advantages, in the state of construction, semi-precast slabs with l tice girders are used in many countries [15][16][17][18][19][20]. However, the advantages in the ultima limit state are almost not applied at all, even though international research has been pe formed [21][22][23][24]. Much of the research for the ultimate limit state was conducted in Ge many (e.g., [1,[25][26][27]), where the design of semi-precast slabs with lattice girders follow technical approvals, which are based on Eurocode 2 [28] in combination with the Nation Annex of Germany [29].…”