本文選題：新型裝配式混凝土墻　切入點(diǎn)：抗震性能試驗(yàn)　出處：《西安建筑科技大學(xué)》2015年碩士論文

【摘要】：裝配式混凝土結(jié)構(gòu)具有工業(yè)化程度高、施工進(jìn)度快、經(jīng)濟(jì)效益及綜合效益高等優(yōu)點(diǎn),符合國(guó)家“低碳經(jīng)濟(jì)”和“四節(jié)一環(huán)�！币�,避免了傳統(tǒng)建筑施工的缺點(diǎn)。課題組在前期研究成果的基礎(chǔ)上將原有生態(tài)復(fù)合墻結(jié)構(gòu)構(gòu)造原理與裝配式剪力墻結(jié)構(gòu)有機(jī)結(jié)合,相互取長(zhǎng)補(bǔ)短、各汲優(yōu)點(diǎn),提出新型裝配式混凝土墻結(jié)構(gòu)體系。本文在新型裝配式混凝土墻體構(gòu)件層面上,考慮了不同布筋方式(均布、田字型、井字型)、豎向連接方式(焊接連接和座漿連接)、水平連接方式(馬牙槎、T型槽和粗糙面),共設(shè)計(jì)了6榀1/2比例墻體(SW1~SW6)構(gòu)件,進(jìn)行擬靜力試驗(yàn)研究。提出基于不同關(guān)鍵參數(shù)變化的新型裝配式混凝土墻體抗側(cè)剛度修正公式,并建立考慮剛度退化的四折線恢復(fù)力模型及改進(jìn)的多豎桿墻體數(shù)值模型,為提出新型裝配式混凝土墻結(jié)構(gòu)設(shè)計(jì)方法奠定理論基礎(chǔ)。本文的主要工作如下:(1)通過(guò)新型裝配式混凝土墻體的擬靜力試驗(yàn),分別研究了不同布筋方式(均布、田字型、井字型)、豎向連接方式(焊接連接和座漿連接)、水平連接方式(馬牙槎、T型槽和粗糙面)等關(guān)鍵參數(shù)對(duì)墻體抗震性能的影響規(guī)律。結(jié)果表明:墻板側(cè)面混凝土連接方式為馬牙槎時(shí),現(xiàn)澆豎向邊緣構(gòu)件與墻板咬合性能較好,遂在墻體受力過(guò)程中墻板與豎向邊緣構(gòu)件的協(xié)同工作性能良好,破壞時(shí)連接處僅出現(xiàn)細(xì)微裂縫;墻體與底梁的豎向連接方式為預(yù)埋焊板焊接時(shí),受力過(guò)程中墻體與底梁的協(xié)同工作性能較好,預(yù)埋焊板不僅能有效傳遞鋼筋豎向應(yīng)力,同時(shí)使預(yù)埋焊板焊接墻體的抗剪切性能優(yōu)于座漿連接墻;6榀墻體的剛度退化規(guī)律基本相同,衰減曲線總體趨勢(shì)是加載初期的剛度退化不穩(wěn)定,隨著位移的增加,塑性變形的不斷發(fā)展,剛度衰減速度變慢,最后趨于平緩。各墻體剛度衰減比較均勻,沒(méi)有明顯的剛度突變。預(yù)埋焊板焊接能有效提高墻體的整體抗側(cè)剛度。(2)在上述試驗(yàn)基礎(chǔ)上,對(duì)比分析不同布筋方式、豎向連接方式和水平連接方式等關(guān)鍵因素對(duì)新型裝配式混凝土墻抗側(cè)剛度的影響;基于ABAQUS非線性數(shù)值模型,考慮混凝土、鋼筋及座漿層的多種材料本構(gòu)組合,建立接觸單元(Contact element)來(lái)模擬水平方向預(yù)制混凝土墻板與現(xiàn)澆邊緣約束構(gòu)件間的水平邊界連接,豎直方向設(shè)置的焊板與砂漿層均與墻板底部邊界按固結(jié)處理,通過(guò)數(shù)值擴(kuò)展分析,討論邊緣約束構(gòu)件配筋率、軸壓比、墻體高寬比以及焊板位置和數(shù)量對(duì)新型裝配式混凝土墻抗側(cè)剛度的影響規(guī)律;最后對(duì)關(guān)鍵參數(shù)進(jìn)行回歸分析,推導(dǎo)出新型裝配式混凝土墻抗側(cè)剛度的修正公式。試驗(yàn)研究及計(jì)算結(jié)果表明:該抗側(cè)剛度修正公式與試驗(yàn)結(jié)果吻合度較高,可以滿足實(shí)際工程計(jì)算需要。(3)通過(guò)對(duì)試驗(yàn)數(shù)據(jù)的分析計(jì)算,得出新型裝配式混凝土墻體的解析式骨架曲線,確定墻體在屈服點(diǎn)、峰值荷載點(diǎn)的標(biāo)準(zhǔn)滯回環(huán),墻體開裂后各階段的剛度退化規(guī)律,以及恢復(fù)力路徑,建立新型裝配式混凝土墻體的恢復(fù)力模型;結(jié)合新型裝配式混凝土墻體的具體特點(diǎn),對(duì)剪力墻多豎桿數(shù)值模型加以改進(jìn),確定模型中軸向彈簧的軸向剛度、剪切彈簧的剪切剛度,建立新型裝配式混凝土墻體的多豎桿數(shù)值模型,計(jì)算得各墻體骨架曲線,并與試驗(yàn)及退化四線型恢復(fù)力模型理論骨架曲線進(jìn)行對(duì)比分析。試驗(yàn)研究及計(jì)算結(jié)果表明:退化四線型恢復(fù)力模型與改進(jìn)的多豎桿墻體數(shù)值模型在描述新型裝配式混凝土墻體抗震行為時(shí)具有較高的精度,可以滿足實(shí)際工程的計(jì)算需求。
[Abstract]:Precast concrete structure with a high degree of industrialization, fast construction speed, high economic benefits and comprehensive benefits, in line with the national "low carbon economy" and "four savings and environmental protection requirements, to avoid the traditional construction project group shortcomings. Based on the results of preliminary studies of the original ecological composite wall structure principle and assembly type shear wall structure organically, learn from each other, the advantages of the new assembly drawing, put forward the concrete wall structure. Based on the model of precast concrete wall member level, taking into account the different reinforcement methods (uniform, Tian font, wells font), vertical connection (welding connection and slurryis connection), the level of connection (horse tooth trough, T groove and rough surface), there are 6 pieces of the 1/2 proportion of the wall (SW1~SW6) component, pseudo static experiment. The proposed coagulation new assembly changes of different key parameters based on The soil wall lateral stiffness formula, and establish the vertical rod wall numerical model considering stiffness degradation of four line restoring force model and improved, which lays the theoretical foundation for the proposed new design method of precast concrete wall structure. The main work of this paper are as follows: (1) through the pseudo static test model of precast concrete wall and different reinforcement methods were studied (uniform, Tian font, wells font), vertical connection (welding connection and slurryis connection), horizontal connection (horse tooth trough, T groove and rough surface) of key parameters of the seismic performance of the wall. The results show that the concrete side wall the connection for the horse tooth trough, cast member and occlusal vertical edge wall is better, then the cooperative work performance in the wall stress and vertical wall edge members in the process of failure when the connection is good, only a tiny crack in the wall and the bottom beam; The vertical connection for the pre welding plate welding, cooperative working performance of wall stress in the process and the bottom beam is good, the embedded welding plate not only can effectively transfer the reinforced vertical stress, shear performance is better than base slurry and embedded welding plate welding connection wall wall; 6 pieces of wall stiffness degradation the law is basically the same, the attenuation curve is overall trend at the initial loading stiffness degradation is not stable, with the increase in displacement, development of plastic deformation, Stiffness Decay slower, and finally tends to be gentle. The wall stiffness attenuation is relatively uniform, no obvious stiffness mutation. Embedded welding plate welding can effectively improve the the lateral stiffness of the whole wall. (2) on the basis of the above test, the comparative analysis of different reinforcement methods, the key factors affecting the vertical connection and the level of connection for new precast concrete wall lateral stiffness; nonlinear numerical model based on ABAQUS Type, considering the concrete constitutive combination of various materials and reinforced a pulp layer, a contact unit (Contact element) to simulate the horizontal direction of precast concrete panels with cast-in-situ boundary elements between the horizontal boundary connection, welded plate set in longitudinal direction and the mortar layer and the wall at the bottom of the plate boundary according to the consolidation process by numerical extension analysis, discussion of boundary element reinforcement ratio, axial compression ratio, and the influence of height width ratio of wall plate welding position and the number of new precast concrete wall lateral stiffness; finally, the key parameters of the regression analysis, the correction formula is derived in precast concrete wall lateral stiffness test. And the results show that the lateral stiffness formula fits well with experimental result, can satisfy the needs of engineering calculation. (3) through the analysis of the test data calculation results show that the new assembly type concrete wall The analytic formula of the skeleton curve, determine the wall at the yield point, peak load hysteresis loops, each stage of wall cracks after the stiffness degradation and recovery path, the restoring force model of the establishment of new precast concrete wall; combined with the specific characteristics of the new precast concrete wall body, the vertical shear walls bar numerical model is improved, determine the model of axial spring axial stiffness, shear spring stiffness, multi vertical rod to establish a numerical model of assembled concrete wall, the calculation of each wall skeleton curve, and test and degradation of four linear restoring force model theory skeleton curves were analyzed. Experimental study and calculation the results show that the vertical wall degradation numerical model of four linear restoring force model and improved with higher accuracy in describing the seismic behavior of a new type concrete wall assembly, to meet the real The computing demand of the intercourse engineering.

【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU37;TU352.11

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