【摘要】：近年來，組合結(jié)構(gòu)在我國發(fā)展迅速，鋼-混凝土組合梁鋼框架是一種常用且重要的組合結(jié)構(gòu)形式，鋼-混凝土組合梁是在鋼梁上翼緣表面焊接抗剪連接件后，澆筑混凝土板從而使鋼筋混凝土翼緣板與鋼梁協(xié)同工作的梁，鋼-混凝土組合梁與鋼柱組成的框架結(jié)構(gòu)即為鋼-混凝土組合梁鋼框架（以下簡稱組合梁鋼框架）。我國是一個地震頻發(fā)的國家，5.12汶川地震造成大量的房屋倒塌、破壞以及巨大的人員傷亡，使我們更深刻地認識到結(jié)構(gòu)抗震性能研究的重要性及迫切性。目前對鋼-混凝土組合梁鋼框架及構(gòu)件的抗震性能研究并不充分，組合梁鋼框架節(jié)點又是整個框架結(jié)構(gòu)受力的關鍵部位，需要單獨重點研究。本課題是在國家自然科學基金(50978074)的資助下完成，本文利用有限元分析軟件ABAQUS對組合梁鋼框架及鋼-混凝土組合梁鋼框架節(jié)點（以下簡稱組合節(jié)點）進行抗震性能研究，主要完成了以下工作： 1）利用ABAQUS對組合節(jié)點（一個邊柱節(jié)點和一個中柱節(jié)點）在梁端循環(huán)荷載作用下進行有限元分析，與已有擬靜力試驗結(jié)果進行對比和驗證，得到用于抗震性能分析的組合節(jié)點有限元模型； 2）基于已驗證的組合節(jié)點模型，對其在循環(huán)荷載作用下的受力性能進行詳細研究，并建立純鋼節(jié)點模型，對組合節(jié)點及純鋼節(jié)點在循環(huán)荷載下的受力性能及滯回耗能能力進行對比分析，得出組合節(jié)點抗彎承載力及抗震耗能能力相比純鋼節(jié)點均有顯著提高； 3）對組合節(jié)點進行參數(shù)分析，探討了包括混凝土板配筋率、混凝土板厚度及鋼梁高度等參數(shù)對組合節(jié)點在循環(huán)荷載作用下承載力及滯回性能的影響，根據(jù)分析結(jié)果提出了組合節(jié)點的抗震設計建議； 4）對一單榀組合梁鋼框架及純鋼框架進行動力彈塑性時程分析，根據(jù)抗震規(guī)范要求選取三條地震動時程曲線，，研究組合框架在地震作用下的應力分布、層間位移（角）及層間剪力分布，根據(jù)塑性變形及損傷集中的部位，判斷結(jié)構(gòu)的薄弱區(qū)域，對組合梁鋼框架的抗震性能進行評價，分析結(jié)果可用于指導組合梁鋼框架結(jié)構(gòu)的抗震設計。
[Abstract]:In recent years, composite structures have developed rapidly in China. Steel frame of steel-concrete composite beams is a common and important composite structure form. Steel-concrete composite beams are welded shear joints on the surface of the upper flange of steel beams. The frame structure composed of steel-concrete composite beam and steel column is the steel-concrete composite beam steel frame (hereinafter referred to as composite beam steel frame). China is a country with frequent earthquakes. The 5.12 Wenchuan earthquake caused a large number of buildings collapse, destruction and huge casualties, so we have a deeper understanding of the importance and urgency of structural seismic performance research. At present, the seismic behavior of steel frame and members of steel-concrete composite beam is not enough, and the steel frame joint of composite beam is the key part of the whole frame structure, which needs to be studied separately. This project was completed with the support of the National Natural Science Foundation (50978074). In this paper, the seismic behavior of steel frame joints of composite beams and steel-concrete composite beams (hereinafter referred to as composite joints) is studied by using finite element analysis software ABAQUS. The main works are as follows: 1) the finite element analysis of composite joints (one side column joint and one middle column joint) under cyclic load at the end of beam is carried out by using ABAQUS, and the results are compared and verified with the existing quasi-static test results. The combined node finite element model for seismic performance analysis is obtained. 2) based on the verified composite joint model, the mechanical behavior of the composite joint under cyclic load is studied in detail, and the pure steel joint model is established. The mechanical behavior and hysteretic energy dissipation capacity of composite joints and steel joints under cyclic load are compared and analyzed. The results show that the flexural bearing capacity and seismic energy dissipation capacity of composite joints are significantly higher than those of pure steel joints. 3) the parameters of composite joints are analyzed, and the influence of the parameters such as reinforcement ratio of concrete slab, thickness of concrete slab and height of steel beam on the bearing capacity and hysteretic performance of composite joints under cyclic load is discussed. According to the analysis results, the seismic design suggestions of composite joints are put forward. 4) dynamic elastic-plastic time-history analysis of a single composite beam steel frame and pure steel frame is carried out. According to the requirements of seismic code, three seismic time-history curves are selected to study the stress distribution of composite frame under earthquake action. According to the location of plastic deformation and damage concentration, the weak area of the structure is judged, and the seismic behavior of composite beam steel frame is evaluated. The results can be used to guide the seismic design of composite beam steel frame structure.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU398.9

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