Investigation on the mechanical behavior of two-way glulam beam string

In this research, a two-way glulam beam string is proposed with the objective of enhancing the lateral stability and aesthetic flexibility of one-way beam string systems. Nine-point loading test on the proposed structure revealed that the load-bearing capacity of the two-way glulam beam string surpasses that of the one-way glulam beam string by 86.21%. Furthermore, a three-dimensional finite element model was established to accurately simulate the test conditions and validated for its efficacy. A parametric analysis was conducted to explore the impact of varying string diameter, revealing a transition in failure modes from lower string breakage to upper bolted joint failure as the diameter increased. Drawing upon the Rayleigh-Ritz method, a calculation approach for determining the ultimate load-bearing capacity of the two-way glulam beam string was proposed. This research endeavors to furnish valuable insights into the design and construction of glulam structures.