【摘要】：砌體結(jié)構(gòu)有成本低、材料來源廣泛、耐久性好、施工方便等優(yōu)點(diǎn)。初步統(tǒng)計(jì),砌體結(jié)構(gòu)占我國各類房屋建筑結(jié)構(gòu)的80%以上。但砌體結(jié)構(gòu)的抗拉、抗彎、抗剪能力低,因而抗震性能差,導(dǎo)致砌體結(jié)構(gòu)在地震中損壞嚴(yán)重。為提升砌體結(jié)構(gòu)的抗震性能,本文提出一種新型抗震加固方法:內(nèi)置鋼板聚合物砂漿面層加固法。砌體結(jié)構(gòu)在地震中破壞多為抗剪強(qiáng)度不足,墻體發(fā)生剪切破壞。為模擬墻體在地震作用下的破壞形態(tài),本試驗(yàn)采用四連桿機(jī)構(gòu)加載。本文考慮了兩個影響因素:砂漿強(qiáng)度(M1、M2.5、M5、M7.5)和加固形式(正交加固、斜撐加固),共計(jì)12片墻體,包括對比未加固墻、正交加固墻和斜撐加固墻。對墻體進(jìn)行低周反復(fù)擬靜力試驗(yàn),詳細(xì)描述試驗(yàn)過程,并對破壞形態(tài)進(jìn)行分析。對比荷載與位移、延性系數(shù)、骨架曲線、剛度退化曲線、能量耗散系數(shù)等抗震性能指標(biāo),綜合分析加固墻的抗震性能。試驗(yàn)數(shù)據(jù)表明,該加固方法是可行的,能大幅度提升墻體的抗震性能。加固墻的破壞形態(tài)得到明顯地改善,呈現(xiàn)明顯的三階段破壞,最終破壞時墻體不會垮塌。不同強(qiáng)度的砌筑砂漿對斜撐加固墻的極限荷載影響不大。斜撐加固法對M1墻的加固效果更為突出,而其余墻體下斜撐加固法的效果較正交加固法有提高,但提高幅度不大。該加固法為磚砌體結(jié)構(gòu)的抗震加固提供了新的解決方案,是一種可大范圍推廣的加固方法。
[Abstract]:Masonry structure has the advantages of low cost, wide source of materials, good durability and convenient construction. Preliminary statistics show that masonry structures account for more than 80% of all kinds of building structures in China. However, the tensile, flexural and shear resistance of masonry structures is low, so the seismic performance of masonry structures is poor, resulting in serious damage to masonry structures in earthquake. In order to improve the seismic performance of masonry structure, a new method of seismic strengthening is presented in this paper: the method of strengthening polymer mortar surface layer with built-in steel plate. The failure of masonry structure in earthquake is mostly due to insufficient shear strength and shear failure of wall. In order to simulate the failure pattern of the wall subjected to earthquake, the four-bar linkage was used in this experiment. In this paper, two influencing factors are considered: mortar strength (M _ (1) M _ (2. 5) M _ (5) M _ (7.5) and reinforcement form (orthogonal reinforcement, diagonal bracing reinforcement). The total number of walls is 12, including comparative unstrengthened wall, orthogonal strengthened wall and inclined braced reinforcement wall. The low-cycle pseudo-static test was carried out on the wall, the test process was described in detail, and the failure pattern was analyzed. The seismic performance of strengthened walls is analyzed by comparing the seismic performance indexes such as load and displacement ductility coefficient skeleton curve stiffness degradation curve and energy dissipation coefficient. Experimental data show that the reinforcement method is feasible and can greatly improve the seismic performance of the wall. The failure form of the strengthened wall is obviously improved, showing obvious three-stage failure, and the wall will not collapse at last. Masonry mortar with different strength has little effect on ultimate load of inclined braced reinforced wall. The reinforcement effect of inclined bracing method on M1 wall is more prominent, while the effect of the other methods is better than that of orthogonal reinforcement method, but the improvement range is not significant. This reinforcement method provides a new solution for seismic strengthening of brick masonry structure and is a kind of reinforcement method which can be popularized in a wide range.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU364;TU352.11

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