摘要
本文以长治市长丰片区棚户区(城中村)改造及配套基础设施建设项目为例,针对在建工程的施工难点提出采用双排扣件式钢管脚手架作为施工方案,并采用有限元程序建立架体三维数值分析模型并进行荷载组合效应分析,得出最不利工况下架体的力学性能以验算其安全适应性,最后对影响架体力学性能的各个因素进行详细分析。结果表明,最不利工况下脚手架最危险部位发生在架体右部顶端,应力值达152MPa,但仍小于结构容许应力;脚手架的最大竖向位移发生在架体跨中位置,竖向位移值为6.24mm,此时架体结构仍处于安全受力范围内;架体各个立杆的应力及位移跟系统升温幅度成正比关系,系统升温25°左右时架体的应力及位移达到最大值,但并未超过杆件容许应力。
Taking the shantytowns(villages in the city) reconstruction and supporting infrastructure construction project in Changfeng District of Changzhi City as the example, and aiming at the construction difficulties of the project under construction, this paper proposes to adopt the double-row fastener-type steel scaffold as the construction scheme, and uses the finite element program to establish a three-dimensional numerical analysis model of the scaffold, analyze the load combination effect, and obtain the mechanical performance of the scaffold under the most unfavorable working conditions to check its safety adaptability, Finally, the factors that affect the mechanical performance of the scaffold are analyzed in detail. The results show that the most dangerous part of the scaffold occurs at the top of the right part of the scaffold under the most unfavorable conditions, and the stress value is up to 152MPa, but it is still less than the allowable stress of the structure. The maximum vertical displacement of the scaffold occurred in the mid-span position of the scaffold, and the vertical displacement value is 6.24mm, while the scaffold structure was still within the safe force range. The stress and displacement of each vertical rod of the scaffold are proportional to the temperature rise of the system. When the temperature rise of the system is about 25°, the stress and displacement of the scaffold reach the maximum value, but still do not exceed the allowable stress of the rod.
出处
《住宅产业》
2023年第1期84-87,共4页
Housing Industry
关键词
双排扣件式脚手架
结构构造
力学性能
影响因素
double row fastener scaffold
structure organization
mechanical performance
influence factor
