新型高层模块建筑整体结构性能数值分析研究
Numerical Investigation on Global Structural Performance of the Innovative High-Rise Modular Buildings
作为新型装配式建筑形式,模块建筑可依据主要受力结构的差异,分为叠箱类模块结构与嵌入式模块结构。其中嵌入式模块结构在结构性能、建筑适用性及可维护性等方面具备技术优势,但存在柱距偏小、现场连接工作量较大等问题。为此,文中提出了一种基于稀疏钢框架的新型高层模块建筑体系。首先构建了该新型模块建筑的整体结构建模方法,再通过Midas Gen分析软件对其开展数值分析。初步分析结果表明:该结构框架柱长细比、框架梁跨度均较大,构件承载力由竖向荷载主导,侧向变形受水平荷载控制,底部框架中部的框架柱及大跨度框架梁为设计控制关键部位。通过参数化分析,文中明确了不同建筑层数和抗震设防烈度对结构整体性能的影响规律,最后为满足刚度与承载力要求对构件进行重新设计,得到不同建筑层数下稀疏框架结构的用钢量水平,为论证该结构设计的可行性及评估其经济性提供参考。
As a new type of prefabricated building,modular structure can be categorized into stacked modular structure and in-fill modular structure.The in-fill modular structure is technically better than stacked modules in terms of structural behavior,architectural applicability and maintainability,however,smaller column spaces and increased onsite connection work remain.Therefore,an innovative high-rise modular structure based on a sparse-component steel frame (SCSF) is proposed.First,a global modeling method for this new modular structural system is developed,and numerical analysis on the structure is conducted via Midas/Gen software.The results show that larger column slenderness ratios and beam spans result in vertical loads governing member bearing capacities,while horizontal actions dominate lateral drift responses,especially for bottom middle columns and large-span beams.Afterwards,parametric analysis are conducted to explore the influences of story numbers and seismic actions on global structural responses.At last,the redesigns of structural members are conducted to satisfy stiffness and strength requirements,and the steel usage levels are compared among models with different story numbers.This results may provide a reference for demonstrating the feasibility of the proposed structural design and evaluating its economic performance.
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湖南省自然科学基金(2023JJ40271)
2022年芙蓉计划省企业科技创新创业团队项目
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