FCP外掛板在低周反復荷載下抗震性能試驗研究
發(fā)布時間：2018-11-21 18:30
【摘要】：在工業(yè)和民用建筑中通常采用工廠預制的外掛墻板進行現(xiàn)場安裝作為其外墻圍護體系,外掛墻板與主體結(jié)構(gòu)之間通常采用連接件進行連接,預制好的外掛板運輸?shù)绞┕がF(xiàn)場后,只要通過簡單安裝便可,省去了很多工序,所以這樣既保證施工質(zhì)量,又可以節(jié)省工期、加快施工進度。本文研究的外掛板叫做水泥纖維外掛板(簡稱FCP外掛板),是由水泥纖維板和鋼龍骨組成,內(nèi)部填充保溫巖棉,這種外掛板質(zhì)量較輕,保溫隔熱性能良好。本文對平面內(nèi)的600mm和800mm龍骨間距的FCP外掛板、以及600mm龍骨間距開洞口的FCP外掛墻板本身進行了低周反復荷載作用下的抗震性能的試驗研究,本試驗的這種連接形式能夠合理的利用了外掛板的強度和剛度。同時進行了擴大參數(shù)的數(shù)值模擬分析,探究外掛板本身的承載能力和延性,得到了以下結(jié)論:(1)對三塊外掛板進行了平面內(nèi)低周往復荷載試驗,分析了墻板的破壞形式,試驗結(jié)果表明:在加載至屈服位移時,外掛板內(nèi)側(cè)的水泥纖維板左下角和右下角分別出現(xiàn)45度裂縫,裂縫方向垂直于對角線方向;連接外掛板與主體結(jié)構(gòu)的U型連接件周圍的水泥纖維板也出現(xiàn)橫向裂縫;當加載至破壞位移時,裂縫持續(xù)開展,外掛板內(nèi)側(cè)角部的水泥纖維板有少量的脫落。試驗結(jié)束后,將試件取下,發(fā)現(xiàn)與主體結(jié)構(gòu)連接處外掛板內(nèi)的邊龍骨被剪壞。(2)對比了三塊墻板的承載能力、剛度退化、強度退化、延性系數(shù)等,得到600龍骨間距的外掛板比800龍骨間距的外掛板的承載力增加了 3%,600龍骨間距的外掛板比800龍骨間距的外掛板的延性系數(shù)增加了 10%;同時通過對600mm龍骨間距未開洞口和開洞口的兩塊外掛板比較可知,未開洞口的外掛板比開洞口的外掛板的承載力高50%,說明開洞對FCP外掛板的抗震承載能力影響較大,開洞口的外掛板的延性好于未開洞口,這是由于洞口兩側(cè)增加了橫向龍骨。(3)本次試驗得到的FCP外掛板的延性系數(shù)范圍為2.1～2.5,屈服位移角θy=1.14～1.714[θe],極限位移角θu=0.228～0.4[θp],通過比較,可知此FCP外掛板的延性不好。針對FCP外掛板的特性,建議研究合適的連接件形式,使外掛板在彈性階段,可以參與結(jié)構(gòu)受力,在彈塑性階段,應用合適的連接件形式,使其有一定的適應主體結(jié)構(gòu)變形的能力,減少此外掛板的受力。(4)對龍骨間距為600的FCP外掛板的標準板帶進行ABAQUS有限元模擬,水泥纖維板采用實體單元,鋼龍骨采用殼單元,得到的結(jié)論與試驗結(jié)論一致,驗證了有限元模型的正確性;同時通過對比300mm龍骨間距、600mm龍骨間距、900mm龍骨間距標準板帶的承載能力和延性,得到以下結(jié)論:外掛板的龍骨間距越小,其中的一個標準板帶的承載力越小,延性越好,說明與龍骨相比,水泥纖維板對承載力的貢獻更大,但水泥纖維板面積的增加對其延性卻有削弱的作用;同時發(fā)現(xiàn)增加水泥纖維板的厚度,其承載力變大,所以為提高承載力可以適當?shù)脑黾影搴?但是板的厚度增加后,延性變差,所以水泥纖維板的厚度不宜過厚。
[Abstract]:In that industrial and civil construction, a factory-made external wall panel is generally adopt for field installation as an external wall enclosure system, and the external wall panel and the main body structure are normally connected by a connecting piece, so that the construction quality can be ensured, the construction period can be saved, and the construction progress can be accelerated. The external wall of this paper is called the external wall of the cement fiber (FCP store). It is made up of cement fibreboard and steel keel. It is filled with heat-insulating rock wool. It is of light quality and good heat-insulating performance. This paper studies the anti-seismic performance of the FCP plug-in plate with the spacing of 600mm and 800mm in the plane, and the FCP plug-in wall panel of the 600mm keel space-opening hole, which can reasonably utilize the strength and rigidity of the plug-in plate. At the same time, the numerical simulation and analysis of the expanded parameters are carried out, and the bearing capacity and ductility of the plug-in plate are investigated. The following conclusions are obtained: (1) The test of the low-weekly reciprocating load in the plane is carried out for three external stores, and the damage form of the wall panel is analyzed. The test results show that: at the time of loading to yield displacement, the lower left corner and the lower right corner of the cement fiberboard on the inner side of the plug-in plate are respectively 45-degree cracks, and the direction of the crack is perpendicular to the diagonal direction; and transverse cracks also occur in the cement fiberboard around the U-shaped connecting piece of the external plug-in plate and the main body structure; When the crack is loaded to the breaking displacement, the crack is continuously carried out, and the cement fiber board at the inner corner part of the external hanging plate has a small amount of shedding. At the end of the test, the test piece was taken to find that the side keels in the pylon at the junction with the body structure were cut. and (2) the bearing capacity, the stiffness degradation, the strength degradation, the ductility coefficient and the like of the three wall plates are compared, and the bearing capacity of the external hanging plate with the spacing of the 600-keel is increased by 3 percent, The ductility factor of the external-store plate with the spacing of 600-keels is increased by 10% than that of the external-store plate with the spacing of 800-keels; at the same time, by comparing the two external-store plates with no opening and opening at the spacing of 600mm, the plug-in plate with no opening is 50% higher than the bearing capacity of the plug-in plate of the opening hole, It is shown that the effect of opening hole on the seismic bearing capacity of the external wall of the FCP is large, and the ductility of the plug-in plate of the opening is good than that of the opening, which is due to the addition of the transverse keels on both sides of the opening. (3) The ductility coefficient of the FCP plug-in plate obtained in this test is 2.1 ~ 2.5, the yield and displacement angle, y = 1.14 ~ 1.714[199e], and the limit displacement angle (u = 0.228 ~ 0.4[[p] p], and it can be seen that the ductility of this FCP plug-in plate is not good. According to the characteristics of the FCP plug-in plate, it is suggested to study the appropriate form of the connecting piece, so that the external hanging plate can be involved in the structural stress during the elastic phase. In the elastic-plastic phase, the appropriate connecting piece can be applied to make it possible to adapt to the deformation of the main structure and to reduce the force of the hanging plate. (4) ABAQUS finite element simulation is carried out on the standard strip of the FCP plug-in plate with the keel spacing of 600, the solid unit is adopted for the cement fibreboard, and the steel keel is used as the shell unit, and the obtained conclusion is consistent with the test conclusion, and the correctness of the finite element model is verified; At the same time, by comparing the bearing capacity and the ductility of the 300 mm keel space, the 600mm keel space and the 900mm keel spacing standard strip, the following conclusion is obtained: the smaller the keel spacing of the plug-in plate, the smaller the bearing capacity of one of the standard strips, the better the ductility, the description is compared with the keel, the contribution of the cement fiber board to the bearing capacity is larger, but the increase of the area of the cement fiber board is weakened by the ductility of the cement fiber board; meanwhile, the thickness of the cement fiber board is increased, and the bearing capacity of the cement fiber board is large, so that the plate thickness can be properly increased for improving the bearing capacity; but after the thickness of the plate is increased, The ductility is poor, so the thickness of the cement fibreboard is not too thick.
【學位授予單位】：沈陽建筑大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU352.11
本文編號：2347905
[Abstract]:In that industrial and civil construction, a factory-made external wall panel is generally adopt for field installation as an external wall enclosure system, and the external wall panel and the main body structure are normally connected by a connecting piece, so that the construction quality can be ensured, the construction period can be saved, and the construction progress can be accelerated. The external wall of this paper is called the external wall of the cement fiber (FCP store). It is made up of cement fibreboard and steel keel. It is filled with heat-insulating rock wool. It is of light quality and good heat-insulating performance. This paper studies the anti-seismic performance of the FCP plug-in plate with the spacing of 600mm and 800mm in the plane, and the FCP plug-in wall panel of the 600mm keel space-opening hole, which can reasonably utilize the strength and rigidity of the plug-in plate. At the same time, the numerical simulation and analysis of the expanded parameters are carried out, and the bearing capacity and ductility of the plug-in plate are investigated. The following conclusions are obtained: (1) The test of the low-weekly reciprocating load in the plane is carried out for three external stores, and the damage form of the wall panel is analyzed. The test results show that: at the time of loading to yield displacement, the lower left corner and the lower right corner of the cement fiberboard on the inner side of the plug-in plate are respectively 45-degree cracks, and the direction of the crack is perpendicular to the diagonal direction; and transverse cracks also occur in the cement fiberboard around the U-shaped connecting piece of the external plug-in plate and the main body structure; When the crack is loaded to the breaking displacement, the crack is continuously carried out, and the cement fiber board at the inner corner part of the external hanging plate has a small amount of shedding. At the end of the test, the test piece was taken to find that the side keels in the pylon at the junction with the body structure were cut. and (2) the bearing capacity, the stiffness degradation, the strength degradation, the ductility coefficient and the like of the three wall plates are compared, and the bearing capacity of the external hanging plate with the spacing of the 600-keel is increased by 3 percent, The ductility factor of the external-store plate with the spacing of 600-keels is increased by 10% than that of the external-store plate with the spacing of 800-keels; at the same time, by comparing the two external-store plates with no opening and opening at the spacing of 600mm, the plug-in plate with no opening is 50% higher than the bearing capacity of the plug-in plate of the opening hole, It is shown that the effect of opening hole on the seismic bearing capacity of the external wall of the FCP is large, and the ductility of the plug-in plate of the opening is good than that of the opening, which is due to the addition of the transverse keels on both sides of the opening. (3) The ductility coefficient of the FCP plug-in plate obtained in this test is 2.1 ~ 2.5, the yield and displacement angle, y = 1.14 ~ 1.714[199e], and the limit displacement angle (u = 0.228 ~ 0.4[[p] p], and it can be seen that the ductility of this FCP plug-in plate is not good. According to the characteristics of the FCP plug-in plate, it is suggested to study the appropriate form of the connecting piece, so that the external hanging plate can be involved in the structural stress during the elastic phase. In the elastic-plastic phase, the appropriate connecting piece can be applied to make it possible to adapt to the deformation of the main structure and to reduce the force of the hanging plate. (4) ABAQUS finite element simulation is carried out on the standard strip of the FCP plug-in plate with the keel spacing of 600, the solid unit is adopted for the cement fibreboard, and the steel keel is used as the shell unit, and the obtained conclusion is consistent with the test conclusion, and the correctness of the finite element model is verified; At the same time, by comparing the bearing capacity and the ductility of the 300 mm keel space, the 600mm keel space and the 900mm keel spacing standard strip, the following conclusion is obtained: the smaller the keel spacing of the plug-in plate, the smaller the bearing capacity of one of the standard strips, the better the ductility, the description is compared with the keel, the contribution of the cement fiber board to the bearing capacity is larger, but the increase of the area of the cement fiber board is weakened by the ductility of the cement fiber board; meanwhile, the thickness of the cement fiber board is increased, and the bearing capacity of the cement fiber board is large, so that the plate thickness can be properly increased for improving the bearing capacity; but after the thickness of the plate is increased, The ductility is poor, so the thickness of the cement fibreboard is not too thick.
【學位授予單位】：沈陽建筑大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU352.11
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