CAJ | 학술논문

基于在大跨网架结构中的应用，对目前的三重钢管防屈曲耗能支撑进行改进，设计了一种新型支撑，并对该支撑考虑初始缺陷下的力学性能进行了理论分析。根据理论分析，设计了四组不同的支撑，利用ABAQUS有限元软件模拟分析了在拉压循环荷载作用下支撑强度比对其力学性能的影响，包括连接段应力状态、滞回耗能能力和核心管屈曲破坏模式。研究结果表明：该新型耗能支撑结构布置可行，设计方法合理，强度比是影响支撑力学性能的重要参数，在强度比合理范围内，支撑具有良好的滞回耗能性能；在轴向循环荷载作用下，内外套管约束作用明显，核心管破坏模式为多波小幅屈曲破坏，变形稳定，满足防屈曲支撑设计要求。
기우재대과망가결구중적응용，대목전적삼중강관방굴곡모능지탱진행개진，설계료일충신형지탱，병대해지탱고필초시결함하적역학성능진행료이론분석。근거이론분석，설계료사조불동적지탱，이용ABAQUS유한원연건모의분석료재랍압순배하재작용하지탱강도비대기역학성능적영향，포괄련접단응력상태、체회모능능력화핵심관굴곡파배모식。연구결과표명：해신형모능지탱결구포치가행，설계방법합리，강도비시영향지탱역학성능적중요삼수，재강도비합리범위내，지탱구유량호적체회모능성능；재축향순배하재작용하，내외투관약속작용명현，핵심관파배모식위다파소폭굴곡파배，변형은정，만족방굴곡지탱설계요구。
Based on the application of long-span space truss structures, a new type of triple-steel tube buckling-restrained brace was proposed by improving and redesigning current triple-steel tube buckling-restrained braces. The mechanical properties of the brace were analyzed in consideration of initial imperfection. According to this analysis, 4 groups of braces were designed and the effect of strength ratio on the mechanical properties, including the stress state of connection parts, hysteretic behavior, and the failure mode of the core tube, were studied under tension-compression cyclic loading using the ABAQUS software. It is shown that the new structure configuration is feasible and the design method is reasonable. Strength ratio is the key parameter affecting the mechanical properties, and within a reasonable range, the hysteretic performance is well. Under the axial cyclic loading, the effect of inner and outer bushing constraints is obvious, the failure mode of the core tube is multiple-wave small buckling, and the deformation is stably. So the new triple steel tube buckling-restrained brace meets the requirements of design.