本文選題：高強混凝土 + 型鋼混凝土　； 參考：《西安建筑科技大學(xué)》2014年博士論文

【摘要】：內(nèi)配管材約束高強混凝土柱、配矩形螺旋箍筋型鋼高強混凝土柱（以下統(tǒng)稱為“新型高強混凝土組合柱”）是指在高強混凝土柱中采用普通箍筋與PVC管（鋼管）組合、矩形螺旋箍筋與型鋼組合得到的新型組合構(gòu)件。該構(gòu)件能增強核心混凝土的約束作用，改善高強混凝土脆性，提高變形能力以滿足延性需求，具有良好的發(fā)展前景。本文通過試驗研究、理論分析和數(shù)值模擬的方法對新型高強混凝土組合柱抗震性能及設(shè)計方法進行系統(tǒng)研究。 依托地方材料，采用合理水膠比、摻加礦物外加劑及高效減水劑等工藝，研制出具有良好工作性能的高強混凝土。根據(jù)現(xiàn)行混凝土試驗方法標(biāo)準，對高強混凝土基本力學(xué)性能及本構(gòu)關(guān)系模型進行系統(tǒng)的試驗及理論研究。 設(shè)計了12根配矩形螺旋箍筋型鋼高強混凝土柱、3根內(nèi)配PVC管約束高強混凝土短柱、1根內(nèi)配鋼管約束高強混凝土短柱和1根普通箍筋約束高強混凝土短柱進行低周反復(fù)荷載試驗，研究了新型高強混凝土組合柱的破壞過程、破壞形態(tài)、變形能力、耗能能力和滯回性能，分析了剪跨比、軸壓比、混凝土強度、體積配箍率、配箍形式、PVC管徑高比等參數(shù)對柱承載力、剛度、延性、耗能能力等性能的影響。研究表明，與普通箍筋約束高強混凝土柱相比，采用內(nèi)置PVC管、鋼管和型鋼得到的新型高強混凝土組合柱具有更優(yōu)越的抗震性能。 通過試驗結(jié)果分析，研究了各設(shè)計參數(shù)對新型高強混凝土組合柱極限受剪承載力的影響規(guī)律。根據(jù)試驗實測縱筋、箍筋、PVC管、鋼管以及型鋼的應(yīng)變情況，分析了新型高強混凝土組合柱發(fā)生不同破壞形態(tài)時的受力機理，建立受力簡化模型，推導(dǎo)出內(nèi)配PVC管約束高強混凝土短柱、內(nèi)配鋼管約束高強混凝土短柱、配矩形螺旋箍筋型鋼高強混凝土柱的極限受剪承載力計算公式，計算結(jié)果與試驗結(jié)果吻合較好，表明提出的受剪承載力計算方法可靠。 基于大小偏壓界限破壞理論，首先推導(dǎo)出普通配筋的鋼筋高強混凝土柱的軸壓比限值計算方法，考慮箍筋約束、周邊縱筋、密集縱筋芯柱作用的影響，推導(dǎo)出與其相對應(yīng)的軸壓比限值計算公式，這也可適用于其它增強措施的高強混凝土柱設(shè)計。然后給出內(nèi)配鋼管約束高強混凝土柱和配矩形螺旋箍筋型鋼高強混凝土柱發(fā)生彎曲破壞時的軸壓比限值計算方法，并利用試驗軸壓比進行檢驗，結(jié)果表明計算軸壓比限值與實際情況吻合較好。對于剪跨比較小的配矩形螺旋箍筋型鋼高強混凝土柱，在考慮含鋼率、體積配箍率等因素對構(gòu)件延性有利影響的基礎(chǔ)上，，給出發(fā)生剪切斜壓破壞時的軸壓比限值。 采用有限元軟件ABAQUS對單調(diào)水平荷載作用下的新型高強混凝土組合柱受力性能進行模擬，有限元結(jié)果與試驗結(jié)果符合較好。在此基礎(chǔ)上，進行剪跨比、軸壓比、鋼材屈服強度及含鋼率、管材徑高比、混凝土強度等因素為目標(biāo)參數(shù)的新型高強混凝土組合柱模擬分析，得到了各參數(shù)對新型高強混凝土組合柱受力性能的影響規(guī)律。 參照國內(nèi)外相關(guān)規(guī)范，將鋼筋高強混凝土框架、內(nèi)配鋼管約束高強混凝土框架和型鋼高強混凝土框架的結(jié)構(gòu)性能水平劃分為正常使用、暫時使用、修復(fù)后使用、生命安全和防止倒塌五檔。基于國內(nèi)外試驗數(shù)據(jù)的分析，提出了鋼筋高強混凝土柱、內(nèi)配鋼管約束高強混凝土柱、型鋼高強混凝土柱及其框架對應(yīng)五檔性能水平的層間位移角限值。
[Abstract]:The inner reinforced concrete column is constrained by high strength concrete column, and the rectangular spiral stirrup steel high strength concrete column (hereinafter referred to as "new high strength concrete composite column") refers to the combination of common stirrup and PVC tube (steel pipe) in high strength concrete columns, a new combination of rectangular spiral stirrup and steel type steel. This component can enhance core coagulation. The restraining effect of soil, improving the brittleness of high strength concrete, improving the deformability to meet the ductility demand, has a good prospect. In this paper, the seismic performance and design method of the new high strength concrete composite column are studied through experimental research, theoretical analysis and numerical simulation.
The high strength concrete with good working performance is developed based on local materials, using reasonable water gel ratio, adding mineral admixtures and high efficiency water reducing agent. According to the current standard of concrete test method, the basic mechanical properties and constitutive relation model of high strength concrete are systematically tested and theoretically studied.
12 high strength concrete columns with rectangular spiral stirrups are designed, 3 with PVC tube confined high strength concrete short columns, 1 high strength concrete short columns confined with steel tubes and 1 common stirrup confined high strength concrete short columns. The failure process of the new high strength coagulant composite column is studied, and the form and deformation of the new high strength concrete composite column are studied. Capacity, energy dissipation capacity and hysteresis performance, the influence of the shear span ratio, axial pressure ratio, concrete strength, volume hoop ratio, stirrup form, PVC pipe height ratio and other parameters on the bearing capacity, stiffness, ductility and energy dissipation capacity of the column are analyzed. The study shows that the new PVC tube, steel tube and steel type steel are adopted in comparison with the high strength concrete columns confined by common stirrup. The high-strength concrete composite column has better seismic performance.
Through the analysis of the test results, the influence of various design parameters on the ultimate shear capacity of the new high strength concrete composite column is studied. According to the strain of test measured longitudinal reinforcement, stirrup, PVC pipe, steel tube and steel type steel, the stress mechanism of the new high strength concrete composite column with different damage forms is analyzed, and the simplified model of stress is established. The calculation formula of ultimate shear bearing capacity of high strength concrete columns confined with PVC tube, internal steel pipe with high strength concrete short column and rectangular spiral stirrup steel high strength concrete column is derived. The calculation results are in good agreement with the experimental results, which shows that the proposed method of shear bearing capacity is reliable.
Based on the theory of size bias limit failure, the calculation method of axial compression ratio of reinforced high strength reinforced concrete columns with common reinforcement is derived. Considering the influence of the confinement of stirrup, the surrounding longitudinal reinforcement and the intensive longitudinal reinforcement core column, the calculation formula of the limit value of axial compression ratio is deduced, which can also be applied to the high strength concrete of other reinforcement measures. The calculation method for the axial compression ratio of the high strength concrete column with the internal steel pipe and the rectangular spiral stirrup steel high strength concrete column is given, and the test results show that the limit value of axial compression ratio is in good agreement with the actual situation. On the basis of the favorable influence of steel ratio and the volume ratio of Stirrup on the ductility of the member, the axial compression ratio of the reinforced steel reinforced concrete column is given.
The finite element software ABAQUS is used to simulate the mechanical performance of a new high strength concrete composite column under the monotone horizontal load. The finite element results are in good agreement with the test results. On this basis, the shear span ratio, axial compression ratio, steel yield strength and steel ratio, the ratio of pipe diameter to height, concrete strength are the new height of the target parameters. The influence of various parameters on the mechanical behavior of the new high strength concrete composite column is obtained through the simulation analysis of the strong concrete composite column.
According to the relevant standards at home and abroad, the structural performance level of the reinforced high strength concrete frame, the steel tube confined high strength concrete frame and the steel high strength concrete frame is divided into normal use, temporary use, the use after repair, life safety and the prevention of collapse. Based on the analysis of domestic and foreign experimental data, the reinforced high strength coagulation is put forward. In the soil column, the steel tube confined high strength concrete column, the steel reinforced high strength concrete column and its frame correspond to the five layer performance level of the interlayer displacement angle limit.

【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】：TU398.9;TU352.11

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