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Static Performance Analysis and Design of Two-span Irregular Prestressed Steel Reinforced High-strength Concrete Frames(PDF)

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

Issue:
2017年03期
Page:
39-46
Research Field:
Publishing date:

Info

Title:
Static Performance Analysis and Design of Two-span Irregular Prestressed Steel Reinforced High-strength Concrete Frames
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
Keywords:
PSRCF;  outer-jacketing adding-story structure;  static performance;  plastic hinge;  design recommendation
PACS:
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DOI:
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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.

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Last Update: 2017-05-31