关键词: 悬挂式三角架, 力学特性, 静力学分析, 载荷组合, 多种载荷

Abstract: To address the inaccuracies in strength and stiffness calculations for suspended climbing brackets caused by neglecting the elastic modulus of concrete, the static performance of a climbing-form bracket used in the construction of a solar absorber tower in Guazhou, Gansu Province was investigated here. By comprehensively considering the elastic modulus of concrete and multiple load cases, the static mechanical behavior of the bracket under reinforcement binding and concrete pouring conditions was analyzed using the finite element method. Results show that omitting the concrete elastic modulus leads to a maximum stress error of 23.8% and an overall stiffness error of 43.19%. Under the rebar tying, the symmetric load-1 condition is identified as the optimal load case, in which the axial forces of the tie bolts and diagonal members are uniformly distributed and minimized. Under concrete pouring, the skew-symmetric load-1 and Asymmetric load-3 condition were identified as the optimal load cases, with uniformly distributed and minimized axial forces in the tie bolts, diagonal members, and vertical tubes. This study provides a reliable scientific basis for safety assessments of the primary load-bearing structure in suspended tripod.

Key words: suspended tripod, mechanical properties, static analysis, load combination, multiple loading