本文選題：RCS混合框架中節(jié)點 + RCS混合框架�。� 參考：《西安建筑科技大學(xué)》2014年博士論文

【摘要】：鋼筋混凝土柱-鋼梁混合框架結(jié)構(gòu)是鋼與混凝土混合結(jié)構(gòu)形式之一,它是由鋼筋混凝土柱和鋼梁組成的,簡稱RCS(Reinforced Concrete Columns and SteelBeams)。RCS混合框架結(jié)構(gòu)綜合了鋼筋混凝土結(jié)構(gòu)和鋼結(jié)構(gòu)各自的優(yōu)點,充分利用材料的性能,是一種具有良好的抗震性能高性價比的結(jié)構(gòu)形式。目前,國內(nèi)外已對RCS混合框架結(jié)構(gòu)進行了一些研究工作,我國對于RCS混合框架結(jié)構(gòu)研究相對滯后,需要開展此方面的研究工作。本文通過試驗研究、數(shù)值模擬和理論分析等手段,對RCS混合框架結(jié)構(gòu)的抗震性能和設(shè)計方法進行研究。主要包括以下方面內(nèi)容:本文設(shè)計了6個RCS混合框架中節(jié)點并進行了低周往復(fù)荷載試驗,對不同構(gòu)造措施下的RCS混合節(jié)點的破壞形態(tài)、承載力、強度剛度退化、滯回性能、延性和耗能進行了研究。RCS混合框架中節(jié)點常見的有三種破壞模式,即局壓破壞、剪切破壞和承壓破壞。本文通過ABAQUS有限元軟件,對以上三種破壞形式節(jié)點進行了模擬分析,,并對影響這三種破壞形式的RCS混合框架中節(jié)點進行了參數(shù)分析。RCS混合框架中節(jié)點抗剪機理較為復(fù)雜,本文對影響RCS混合節(jié)點抗剪承載力的參數(shù)進行了分析,主要參數(shù)分別為節(jié)點核心區(qū)混凝土強度、鋼梁腹板強度、軸壓比、翼緣切除程度及配箍率等。假設(shè)節(jié)點核心區(qū)內(nèi)外混凝土變形一致,提出了以鋼腹板和混凝土斜壓桿共同抗剪的機理,并根據(jù)抗剪機理得出RCS混合節(jié)點抗剪承載力公式,并對公式進行了驗證。本文設(shè)計了1榀RCS混合框架的并進行了低周往復(fù)試驗。對RCS混合框架的承載力、層間位移角、延性、強度剛度退化和耗能等進行了研究。研究表明RCS混合框架具有較好良好的抗震性能。通過ABAQUS有限元軟件對RCS混合框架進行了受力機理分析,得出了RCS混合框架在各特征點下應(yīng)力發(fā)展狀態(tài),明確了RCS混合框架的工作機理。通過Open SEES有限元軟件,對RCS混合框架進行參數(shù)分析,進一步得出了各參數(shù)對RCS混合框架受力性能影響規(guī)律。本文介紹了鋼筋混凝土框架和鋼框架“強柱弱梁”設(shè)計方法,并對RCS混合框架“強柱弱梁”設(shè)計方法提出了相應(yīng)的建議。以基于位移抗震設(shè)計的思想對RCS混合框架進行設(shè)計方法進行了研究。將RCS混合框架結(jié)構(gòu)在地震作用下的性能水準劃分為五檔,與三個地震作用水準相結(jié)合,提出了三組結(jié)構(gòu)性能目標。參考RCS混合框架試驗,確定了RCS混合框架不同性能水平的量化指標。以一規(guī)則結(jié)構(gòu)為例,說明基于位移抗震設(shè)計方法在RCS混合框架中的具體實施過程。
[Abstract]:The composite frame structure of reinforced concrete column and steel beam is one of the composite structures of steel and concrete, which is composed of reinforced concrete column and steel beam. RCS(Reinforced Concrete Columns and SteelBeams).RCS hybrid frame structure combines the advantages of reinforced concrete structure and steel structure, and makes full use of the properties of materials. It is a kind of structure with good seismic performance and high cost performance. At present, some research work has been done on the RCS hybrid frame structure at home and abroad, but the research on the RCS hybrid frame structure in our country is lagging behind, so it is necessary to carry out the research work in this field. In this paper, the seismic behavior and design method of RCS hybrid frame structures are studied by means of experimental research, numerical simulation and theoretical analysis. The main contents are as follows: in this paper, the joints of six RCS hybrid frames are designed and the low cycle reciprocating load tests are carried out. The failure patterns, bearing capacity, strength and stiffness degradation, hysteretic performance of RCS hybrid joints under different construction measures are studied. The ductility and energy dissipation of RCS hybrid frame are studied. There are three common failure modes of the joints, namely, partial pressure failure, shear failure and compression failure. In this paper, the ABAQUS finite element software is used to simulate and analyze the joints of the above three kinds of failure forms, and the parameters of the joints in the RCS hybrid frame which affect these three failure forms are analyzed. The shear mechanism of the joints in the RCS hybrid frame is more complex. In this paper, the parameters affecting the shear capacity of RCS hybrid joints are analyzed. The main parameters are the concrete strength in the core zone of the joints, the steel beam web strength, the axial compression ratio, the flange removal degree and the hoop ratio, etc. On the assumption that the deformation of concrete in and out of the core zone of the joint is the same, the shear resistance mechanism of steel web plate and concrete oblique compression bar is put forward. According to the shear mechanism, the shear bearing capacity formula of RCS hybrid joint is obtained, and the formula is verified. In this paper, a RCS hybrid frame is designed and the low cycle reciprocating test is carried out. The bearing capacity, interstory displacement angle, ductility, strength and stiffness degradation and energy dissipation of RCS hybrid frame are studied. The results show that the RCS hybrid frame has good seismic performance. The stress mechanism of RCS hybrid frame is analyzed by ABAQUS finite element software, and the stress development state of RCS hybrid frame under each characteristic point is obtained, and the working mechanism of RCS hybrid frame is clarified. Through the Open SEES finite element software, the parameter analysis of the RCS hybrid frame is carried out, and the influence of each parameter on the mechanical behavior of the RCS hybrid frame is obtained. This paper introduces the design method of "strong column and weak beam" for reinforced concrete frame and steel frame, and puts forward corresponding suggestions for the design method of "strong column weak beam" of RCS hybrid frame. The design method of RCS hybrid frame based on displacement seismic design is studied. The performance level of RCS hybrid frame structure under seismic action is divided into five stages and combined with three seismic action levels.Three groups of structural performance targets are proposed. Referring to the RCS hybrid frame test, the quantitative indexes of different performance levels of RCS hybrid frame are determined. Taking a regular structure as an example, the concrete implementation process of displacement-based seismic design method in RCS hybrid frame is illustrated.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TU375;TU352.11

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