Experimental investigation on eccentric Compression performance of semirigid joints in reticulated timber shells

Compression tests were conducted on the glulam members under different eccentricities, including three cases of 0mm, 50mm and 100mm respectively, to study the mechanical performance of the new assemblage joints in reticulated timber shells. The bending stiffness and bending capacity of joints were evaluated, at the same time,the influence of failure mode and the changes of eccentricity on compression-bending performance was studied. The main conclusions are as follows: 1. different failure modes might happen, including the local buckling of steel plate in the joint zone, the bulking of steel bar in glulam members and the failure of wood members in tension or compression. 2. the capacity and ductility of rectangular section components are superior to square section components. More attention should be paid to the limitation of height-width ratio in the direction of eccentricity, when the glulam members of latticed shells are designed. 3. The eccentricity has a greater effect on the mechanical properties of square section components. Combined with the data obtained from the experiment, the formula for predicting the moment-rotation curves at different eccentricities was fitted out.