两跨非规则预应力型钢高强混凝土框架静力性能分析与设计-《建筑科学与工程学报》

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Title:: Static Performance Analysis and Design of Two-span Irregular Prestressed Steel Reinforced High-strength Concrete Frames

作者:: 计静，陈晓坤，张文福，张云峰，刘迎春，卢召红; 东北石油大学黑龙江省防灾减灾工程与防护工程重点实验室

Author(s):: JI Jing, CHEN Xiao-kun, ZHANG Wen-fu, ZHANG Yun-feng, LIU Ying-chun, LU Zhao-hong; Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University

关键词:: 非规则预应力型钢高强混凝土框架; 套建增层; 静力性能; 塑性铰; 设计建议

Keywords:: PSRCF; outer-jacketing adding-story structure; static performance; plastic hinge; design recommendation

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文献标志码:: A

摘要:: 为研究基于套建增层的两跨非规则预应力型钢高强混凝土框架（PSRCF）静力受力性能，以高强混凝土强度等级、框架柱轴压比和长细比、框架梁跨高比、框架柱角钢含钢率以及预应力筋的张拉控制应力为主要参数，设计了15组单层两跨PSRCF体系；基于简化力学模型和材料本构关系，利用ABAQUS软件建立PSRCF的有限元模型，开展了单跨非规则预应力和非预应力框架的滞回分析，对通过仿真分析获得的滞回曲线和骨架曲线与拟静力试验结果进行对比，以验证有限元模型的合理性；基于此开展15组单层两跨PSRCF在竖向轴力及水平荷载作用下的静力分析，得到框架的单调荷载位移曲线，考察了荷载位移曲线随主要参数的变化规律，给出结构体系的塑性铰出现顺序和两跨PSRCF在套建增层工程中的设计建议。结果表明：柱的轴压比和长细比是影响框架静力性能的主要因素，塑性铰依然按照强柱弱梁的顺序出现，两跨非规则框架结构体系设计是合理的，可为该类新型结构体系在地震区的推广应用奠定基础。

Abstract:: In order to study the static performance of two-span irregular prestressed steel reinforced high-strength concrete frames（PSRCF） based on outer-jacketing adding-story structure, the high-strength concrete grades, axial compression ratio and slenderness ratio of frame columns, span-height ratio of frame beams, steel ratio of frame columns and tension control stress of prestressed tendons were taken as the main parameters, 15 groups of single-floor twospan PSRCF were designed. Based on simplified mechanical model and constitutive relationship of materials, the finite element models of PSRCF were established using ABAQUS software, and the hysteretic analyses of singlespan irregular prestressed and non-prestressed frames were carried out. The hysteresis and skeleton curves of simulation analysis and pseudo-static test were compared to verify the rationality of finite element modeling. The static performance analysis of 15 groups of single-floor two-span PSRCF under vertical axial force and horizontal load were carried out. The monotonic loaddisplacement curves were obtained, and the variation laws of the load-displacement curves with main parameters were investigated. The order of plastic hinge and design recommendations of the twospan PSRCF in outer-jacketing adding-story project were presented. The results show that the axial compression ratio and slenderness ratio of the columns are the main factors influencing the static performance of frame. The plastic hinges still appear in the order of strong column and weak beam, and the design of this kind of irregular frame structure is reasonable. The conclusions can lay the foundation for the popularization and application of the new structure in seismic region.

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

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