發(fā)布時(shí)間：2018-01-06 23:37

  本文關(guān)鍵詞：新型裝配式混凝土墻抗震性能試驗(yàn)及正截止面受彎承載力研究　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 新型裝配式混凝土墻 關(guān)鍵參數(shù) 馬牙槎 預(yù)埋焊板 受彎承載力

【摘要】：隨著我國“建筑工業(yè)化、住宅產(chǎn)業(yè)化”進(jìn)程加快,一批適合我國國情和地域特點(diǎn)的新型裝配整體式混凝土結(jié)構(gòu)體系應(yīng)運(yùn)而生,其具有施工快捷、連接可靠、耗能減震、生態(tài)節(jié)能等優(yōu)勢(shì)。本文通過6榀新型裝配式混凝土墻抗震性能試驗(yàn),分別研究不同布筋形式、豎向連接方式、水平連接方式等關(guān)鍵參數(shù)對(duì)墻體破壞形態(tài)及抗震性能的影響規(guī)律;在試驗(yàn)研究的基礎(chǔ)上,建立基于關(guān)鍵參數(shù)變化墻體非線性數(shù)值擴(kuò)展分析模型,對(duì)比分析關(guān)鍵參數(shù)變化對(duì)墻體主要抗震性能指標(biāo)的影響規(guī)律;以平截面假定為基礎(chǔ),通過平截面假定的驗(yàn)證和計(jì)算模型的簡(jiǎn)化,探討性提出墻體正截面計(jì)算分析模型與承載力計(jì)算公式。本文主要研究?jī)?nèi)容與成果包括:1、通過6榀1/2比例墻體在豎向及水平荷載共同作用下的擬靜力試驗(yàn),分別研究不同布筋方式(均布、田字型、井字型)、豎向連接方式(焊接、座漿)、水平連接方式(馬牙槎、T型槽、粗糙面)等關(guān)鍵參數(shù)對(duì)墻體破壞特征及抗震性能的影響規(guī)律。試驗(yàn)研究及分析結(jié)果表明:1)僅SW6表現(xiàn)為彎曲破壞,其余5榀墻體均發(fā)生彎剪破壞;2)井字型配筋墻體較其他類型配筋墻體,裂縫分布更均勻,滯回曲線更飽滿,承載力、剛度略高,延性較好;3)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)于座漿連接墻體;4)現(xiàn)澆豎向邊緣構(gòu)件與預(yù)制墻板的水平連接整體性良好,馬牙槎墻體的水平連接性能優(yōu)于其他方式的水平連接。2、在試驗(yàn)研究的基礎(chǔ)上,建立墻體非線性數(shù)值模型,將數(shù)值模擬結(jié)果與試驗(yàn)結(jié)果進(jìn)行對(duì)比分析,驗(yàn)證數(shù)值模型的準(zhǔn)確性;開展基于關(guān)鍵參數(shù)變化的數(shù)值擴(kuò)展分析,對(duì)比分析豎向約束構(gòu)件配筋率(4榀)、軸壓比(4榀)、高寬比(4榀)、焊板位置及數(shù)量(3榀)對(duì)新型裝配式混凝土墻體抗震性能的影響規(guī)律。數(shù)值分析結(jié)果表明:1)隨著豎向邊緣構(gòu)件配筋率的增大,墻體受彎承載力略有提高,延性有所提高;2)隨著軸壓比的增大,墻體承載力逐漸提高,延性系數(shù)降低;3)隨著高寬比的增大,墻體受彎承載力均顯著降低,但延性有所提高;4)焊板位置由墻板居中處變?yōu)閴Π宥瞬?墻體受彎承載力和延性均有所提高,但焊板超過一定數(shù)量時(shí),承載力及延性略有降低。3、在試驗(yàn)及數(shù)值擴(kuò)展分析的基礎(chǔ)上,以墻體底面為正截面受彎控制截面,進(jìn)行平截面假定的驗(yàn)證;基于平截面假定,建立更為有效的墻體計(jì)算簡(jiǎn)化模型,把墻體各階段應(yīng)力及內(nèi)力計(jì)算貫通起來,根據(jù)平衡方程建立起正截面計(jì)算體系,探討性提出墻體正截面壓彎、拉彎承載力實(shí)用計(jì)算公式,并建議性的提出裝配式結(jié)構(gòu)與現(xiàn)澆結(jié)構(gòu)正截面受彎承載力之間的折減系數(shù)。理論計(jì)算與試驗(yàn)結(jié)果表明:通過壓彎承載力計(jì)算值與實(shí)測(cè)值的對(duì)比分析,證明新型裝配式混凝土墻受彎承載力計(jì)算公式的合理準(zhǔn)確性,為新型裝配式混凝土結(jié)構(gòu)體系實(shí)際工程設(shè)計(jì)提供一定參考。
[Abstract]:As China's industrial building, residential industrialization process accelerated, emerged a number of suitable for China's national conditions and regional characteristics of the new prefabricated concrete structure system, which has convenient construction, reliable connection, energy dissipation, energy conservation and other advantages. Through the test of 6 pieces of the new assembly of seismic performance of concrete wall, respectively different reinforcement forms, vertical connection, connection level key parameters such as the influence of the failure mode and seismic performance; on the basis of experimental research, an extended numerical analysis model of key parameters based on the nonlinear variation of the wall body, comparative analysis of influence of key parameters on the seismic performance of the main indexes of the wall on the plane section; the simplified assumption, verified by the plane section assumption and calculation model, the paper presents the calculation and analysis of wall cross-section model and bearing capacity. Formula. The main research contents and results are as follows: 1, through the test of 6 1/2 ratio of wall in the vertical and horizontal loads of the pseudo static test, studies of different reinforcement methods (uniform, Tian font, wells font), vertical connection (welding, seat, water slurry) flat connection (horse tooth trough, T groove, rough surface) of the key parameters of wall failure characteristics and seismic performance. The experimental research and analysis of the results showed that: 1) only SW6 bending failure, the remaining 5 pieces of wall were bending shear failure; 2) well type reinforcement wall than other types of reinforcement wall crack, distribution, hysteretic curve Fuller, bearing capacity, stiffness and ductility is slightly higher, better; 3) embedded welding plate not only can effectively transfer the reinforced vertical stress, shear performance is better than base slurry and pre welding plate welding of wall connecting wall; 4) cast member and the vertical edge prefabricated wall panel The level of connection of good integrity, connect the.2 connection is better than the other way of horse tooth trough wall level, on the basis of experimental research, the establishment of the wall nonlinear numerical model, the numerical simulation results are compared with experimental results, accurately verify the numerical model; numerical analysis are carried out based on the change of key parameters of the expansion, comparison analysis of vertical constraint reinforcement ratio (4 specimens), axial compression ratio (4), the ratio of height to width (4 pieces), welding position and quantity (3 pieces) influence on the seismic performance of precast concrete wall. The numerical results show that: 1) with the increase of reinforcement ratio of vertical edge component the slight increase of flexural bearing capacity of the wall, the ductility is improved; 2) with the increase of axial compression ratio, gradually improve the bearing capacity of the wall, the ductility coefficient decreased; 3) with the increase of the ratio of height to width, wall bending bearing capacity decreased significantly, but the ductility increased; 4) welding plate position from the middle wall to wall end, capacity and ductility were improved the flexural bearing wall plate welding, but more than a certain amount, the bearing capacity and ductility decreased slightly in.3, expansion test and numerical analysis on the basis of the bottom wall is normal section bending control section. To verify the assumption of plane section; based on the plane section assumption, establish a more effective wall simplified calculation model and the various stages of the wall stress and internal force calculation through up according to the balance equation, calculating system of normal section, the paper presents the calculation formula of normal section bending wall, bending bearing capacity and practical, constructive this is section assembling type structure and the cast-in-place structure bending capacity between the reduction coefficient. Theoretical calculation and experimental results show that the bending bearing capacity calculated values and the measured values, which proves that the new precast concrete wall in bending The reasonable accuracy of the calculation formula of bearing capacity provides a certain reference for the practical engineering design of the new type of assembled concrete structure system.

【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)】：TU375;TU352.11

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