砌体结构房屋加固足尺实验模型数值模拟
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摘要
对采用外套预制结构加固的砌体结构足尺实验模型进行了数值模拟研究,研究结果表明加固效果良好,加固后原砌体结构的地震响应大大减小。外套结构采用了预制装配技术,包括预制钢筋混凝土墙片、阳台楼板等。其中,预制钢筋混凝土墙片之间采用角钢和抗剪键焊接连接,进行砌体结构横墙加固;在预制墙片和砌体原纵墙之间设置抗剪键进行纵墙加固。基于通用有限元软件ABAQUS对该模型进行了动力分析,分析结果表明,加固后结构纵横墙两个方向的基底剪力绝大部分由外套结构承担,原砌体结构承担剪力得到有效削弱,大大提高了原结构抗震能力。
Numerical simulation of a full-scale masonry building strengthened by external prefabricated structure is carried out.The results show that seismic response o f original masonry building is mitigated effectively after reinforcement.The st rengthen technology has achieved good effects.Prefabricated technology is appli ed in external structure.The precast structural elements include reinforced con crete panels,balcony slabs et al.Different prefabricated panels are welded tog ether through angle steel and shear lug,which is utilized to strengthen the tra nsversal walls of masonry building.Shear lugs are installed between masonry wal ls and precast reinforced concrete walls to retrofit the longitudinal wall.Dyna mic response of reinforced masonry building is analyzed through ABAQUS.The resu lts show that the base shear forces of longitudinal and transverse direction are undertook all mostly by external structure.The base shear forces of masonry bu ilding are reduced greatly.Aseismic capability of original masonry building is enhanced effectively.
Numerical simulation of a full-scale masonry building strengthened by external prefabricated structure is carried out.The results show that seismic response o f original masonry building is mitigated effectively after reinforcement.The st rengthen technology has achieved good effects.Prefabricated technology is appli ed in external structure.The precast structural elements include reinforced con crete panels,balcony slabs et al.Different prefabricated panels are welded tog ether through angle steel and shear lug,which is utilized to strengthen the tra nsversal walls of masonry building.Shear lugs are installed between masonry wal ls and precast reinforced concrete walls to retrofit the longitudinal wall.Dyna mic response of reinforced masonry building is analyzed through ABAQUS.The resu lts show that the base shear forces of longitudinal and transverse direction are undertook all mostly by external structure.The base shear forces of masonry bu ilding are reduced greatly.Aseismic capability of original masonry building is enhanced effectively.
引文
[1]李英民,韩军,刘立平.“5.12”汶川地震砌体结构房屋震害调查与分析[J].西安建筑科技大学学报(自然科学版).2009,41(5):606-611.
[2]中国建筑科学研究院.2008年汶川地震建筑震害图片集[M].北京:中国建筑工业出社,2008.
[3]王威,周颖,梁兴文,等.砌体结构在2008汶川大地震中的震害经验[J].地震工程与工程振动,2010,30(1):60-68.
[4]林玮,李巨文.多层砌体房屋抗震加固方法评述[J].地震工程与工程振动,2006,26(6):145-146.
[5]康艳博,巩正光,宋红,等.混凝土板墙加固砖墙抗震性能综述[J].工程抗震与加固改造,2010,32(4):80-85.
[6]信任,姚继涛.多层砌体结构墙体典型抗震加固技术和方法[J].西安建筑科技大学学报(自然科学版),2010,42(2):251-255.
[7]高剑平.砖混房屋整体式外套框架加层结构分析[J].华东交通大学学报,2007,24(1):40-43.
[8]任晓崧,刘创.外套钢筋混凝土墙的多层砌体结构抗震性能分析[J].建筑结构学报,2010,31(S2):334-338.
[9]林旭川,陆新征,缪志伟,等.基于分层壳单元的RC核心筒结构有限元分析和工程应用[J].土木工程学报,2009,42(3):49-54.
[10]缪志伟,陆新征,叶列平.分层壳单元在剪力墙结构有限元计算中的应用[J].建筑结构学报,2006,27(S2):932-935.
[2]中国建筑科学研究院.2008年汶川地震建筑震害图片集[M].北京:中国建筑工业出社,2008.
[3]王威,周颖,梁兴文,等.砌体结构在2008汶川大地震中的震害经验[J].地震工程与工程振动,2010,30(1):60-68.
[4]林玮,李巨文.多层砌体房屋抗震加固方法评述[J].地震工程与工程振动,2006,26(6):145-146.
[5]康艳博,巩正光,宋红,等.混凝土板墙加固砖墙抗震性能综述[J].工程抗震与加固改造,2010,32(4):80-85.
[6]信任,姚继涛.多层砌体结构墙体典型抗震加固技术和方法[J].西安建筑科技大学学报(自然科学版),2010,42(2):251-255.
[7]高剑平.砖混房屋整体式外套框架加层结构分析[J].华东交通大学学报,2007,24(1):40-43.
[8]任晓崧,刘创.外套钢筋混凝土墙的多层砌体结构抗震性能分析[J].建筑结构学报,2010,31(S2):334-338.
[9]林旭川,陆新征,缪志伟,等.基于分层壳单元的RC核心筒结构有限元分析和工程应用[J].土木工程学报,2009,42(3):49-54.
[10]缪志伟,陆新征,叶列平.分层壳单元在剪力墙结构有限元计算中的应用[J].建筑结构学报,2006,27(S2):932-935.
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