【摘要】：填充墻框架結(jié)構(gòu)是廣泛應(yīng)用于房屋建筑中的一種結(jié)構(gòu)體系。國內(nèi)外大量震害表明,在強震作用下填充墻與框架相互作用非常復(fù)雜,導(dǎo)致結(jié)構(gòu)和填充墻都發(fā)生了嚴重破壞,采用傳統(tǒng)填充墻連接方式已不能完全滿足填充墻框架抗震性能要求。我國墻體改革,限制粘土磚的使用之后,蒸壓加氣混凝土砌塊作為一種綠色環(huán)保墻體材料,符合國家可持續(xù)發(fā)展戰(zhàn)略。為充分發(fā)揮其性能優(yōu)勢以及滿足節(jié)能環(huán)保的要求,砌體需采用薄灰縫(不大于5mm),故不能按常規(guī)要求直接配置Φ5~6mm的鋼筋,而傳統(tǒng)的割槽配筋做法施工又較為繁瑣。因此迫切需要尋找一種鋼筋替代品,它既能實現(xiàn)薄灰縫,又能提高墻體延性,對墻體變形構(gòu)成強有力約束。本文采用蒸壓加氣混凝土砌塊作為填充墻材料,嘗試用玄武巖纖維格柵替代鋼筋作為填充墻的拉結(jié)材料,主要工作如下:(1)查閱大量的文獻以及廣泛調(diào)研之后,本文選取了一種性能較好的材料——玄武巖纖維格柵(簡稱BFG),并對其進行了基本力學(xué)性能試驗,結(jié)果表明該材料力學(xué)性能能夠滿足設(shè)計要求;(2)考慮了纖維格柵材料類型、布置方式及表面處理方式等因素對配BFG蒸壓加氣混凝土砌塊砌體進行了基本力學(xué)性能試驗研究,對比分析了未配置纖維格柵與配置纖維格柵砌體抗壓和抗剪強度,結(jié)果表明在蒸壓加氣混凝土砌塊砌體灰縫中配玄武巖纖維格柵提高了砌體的抗壓強度及抗剪強度,與未配格柵的普通砌體相比,抗壓強度提高約10%,抗剪強度提高約13%。灰縫厚度為5mm左右,能滿足薄灰縫設(shè)計要求;(3)針對玄武巖纖維格柵的特性,設(shè)計了兩種墻-框架柱連接方式,并對配BFG蒸壓加氣混凝土砌塊填充墻進行了平面內(nèi)和平面外抗震性能試驗。平面內(nèi)抗震性能試驗對比分析了純框架和兩種連接方式的填充墻框架破壞特征、滯回曲線、骨架曲線、強度衰減、剛度退化、位移延性以及耗能能力,結(jié)果表明與純框架相比,本文采用的兩種連接方式的配BFG蒸壓加氣混凝土砌塊填充墻框架承載能力提高很小;平面外抗震性能試驗對比分析了兩種連接方式的填充墻破壞特征、面外荷載-位移曲線、墻體位移分布以及格柵應(yīng)變分布,結(jié)果表明玄武巖纖維格柵能限制墻體的位移,能提高墻體的抗倒塌能力;(4)根據(jù)配BFG蒸壓加氣混凝土砌塊填充墻的抗震性能試驗結(jié)果,對應(yīng)用玄武巖纖維格柵作為填充墻拉結(jié)材料進行了可行性分析,結(jié)果表明配BFG填充墻面外承載能力能夠滿足水平地震作用力的要求,且較傳統(tǒng)的拉筋連接更加的經(jīng)濟。
[Abstract]:Filled-wall frame structure is a kind of structure system which is widely used in building. A large number of earthquake disasters at home and abroad show that the interaction between the filled wall and the frame is very complex under the action of strong earthquakes, which leads to serious damage to the structure and the filled wall. The traditional filled wall connection can not fully meet the seismic performance requirements of the filled wall frame. The autoclaved aerated concrete block, as a kind of green and environmental protection wall material, accords with the national sustainable development strategy after the wall reform in our country and the restriction on the use of clay brick. In order to give full play to its performance advantages and meet the requirements of energy saving and environmental protection, the masonry should adopt thin ash joints (no more than 5mm), so the reinforcement of 桅 5~6mm can not be directly configured according to the conventional requirements, and the construction of traditional grooving reinforcement is more tedious. Therefore, there is an urgent need to find a replacement steel bar, which can not only realize the thin ash seam, but also improve the ductility of the wall, thus forming a strong constraint on the deformation of the wall. In this paper, autoclaved aerated concrete block is used as filling wall material, basalt fiber grid is used to replace steel bar as tension material for filling wall. The main work is as follows: (1) after consulting a large number of literature and extensive investigation, In this paper, basalt fiber grille (BFG), a kind of material with good performance, is selected and tested for its basic mechanical properties. The results show that the mechanical properties of the material can meet the design requirements. (2) the basic mechanical properties of BFG autoclaved aerated concrete block masonry are studied by considering the types of fiber grille materials, layout and surface treatment. The compressive strength and shear strength of non-fiber grille masonry and fiber-reinforced grille masonry are compared and analyzed. The results show that the compressive strength and shear strength of the masonry are improved with basalt fiber grille in the ash joint of autoclaved aerated concrete block masonry, and the compressive strength and shear strength of the masonry are improved by using basalt fiber grid. Compared with the ordinary masonry without grille, the compressive strength and shear strength are increased by about 10% and 13% respectively. The thickness of gray seam is about 5mm, which can meet the design requirements of thin ash seam. (3) according to the characteristics of basalt fiber grid, two kinds of wall-frame column connection modes are designed, and the in-plane and out-of-plane seismic performance tests of filled walls with BFG autoclaved aerated concrete block are carried out. The failure characteristics, hysteretic curves, skeleton curves, strength attenuation, stiffness degradation, displacement ductility and energy dissipation capacity of the filled wall frame with pure frame and two connection modes are compared and analyzed by in-plane seismic performance tests. The results show that compared with the pure frame, the results show that, In this paper, the load carrying capacity of BFG autoclaved aerated concrete block filled wall frame with two connection modes is improved little. The results of out-of-plane seismic tests show that basalt fiber grid can limit the displacement of the wall, including the failure characteristics, out-of-plane load-displacement curve, wall displacement distribution and grid strain distribution of the two kinds of connections, and the results show that the wall displacement can be limited by basalt fiber grid. It can improve the anti-collapse ability of the wall; (4) based on the experimental results of seismic performance of filled wall filled with BFG autoclaved aerated concrete block, the feasibility analysis of basalt fiber grille used as tension material for filling wall is carried out. The results show that the out-of-plane bearing capacity of the wall filled with BFG can meet the requirements of horizontal seismic forces, and it is more economical than the traditional tie-up connections.
【學(xué)位授予單位】：中國地震局工程力學(xué)研究所
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU352.11

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