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In this study, a total of forty-two joint specimens were designed to explore the properties of the bolted bamboo-steel-bamboo connection under axial tension. Key design parameters were selected as variables, including the bolt end distance, diameter, and number. Failure modes and mechanical properties were analyzed from the aspects of both bolts and joints. Finally, modified from calculation formula for the bearing capacity of bolted joints in wood structures, the design method for the tested bamboo scrimber connection joint was proposed for the bearing capacity while considering the influence of bolt diameter and bolt number. According to the experimental results, the joint failure was mainly controlled by the bamboo scrimber bearing capacity and bolt bending. Within the design scope, the influence of bolt end distance on the bearing capacity of the joint can be ignored. The bearing capacity of the joint increases with the increase of the bolt diameter. For single-row bolt connection, the bearing capacity of the joint increases with the increase of the number of bolts. The modified formula of single-bolt bearing capacity in the Chinese design codes and multi-bolt bearing capacity in the European code for design of wood structures are in best agreement with the test results. [ABSTRACT FROM AUTHOR]

Variable depth continuous box girder bridges are widely used recently. However, the influence mechanism of the inflection point and variable depth on the shear behaviour of this type bridge has not been fully understood. In this paper, reinforced concrete (RC) beams with constant depth and variable depth were designed as constrained beams to create the inflection point. Firstly, a theoretical uncoupling theory for shear and flexural deformation of variable depth beam was derived. Then, the after cracking shear deformations and the ultimate failure loads were measured. Further, preliminary reveal of the influence mechanism of inflection point on the shear capacity was attempted. Finally, the development of after-cracking shear strain and the degradation of shear stiffness were studied. The formation of first critical diagonal cracks and yielding of stirrup are the turning points of shear stiffness. Increasing stirrup ratio provides more apparent enhancement for residual shear stiffness, which means more effective inhibition on shear deformation.