芦山地震雅安某农村砌体结构房屋震害分析
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摘要
砌体结构是中国传统的建筑形式,亦是我国农村房屋主要的结构形式,但由于砌体结构材料本身的脆性性质,致使砌体结构的抗震能力相比于钢筋混凝土结构或钢结构建筑较差。"4.20"芦山地震使地震灾区的房屋尤其是农村砌体结构房屋受损严重。通过对芦山地震灾区的实地考察,针对芦山地震的震害特点,选取震后典型的农村受损房屋,利用ANSYS软件进行数值建模,通过数据表形式导入芦山地震波,模拟典型房屋在地震中的受力情况,分析其在地震中的破坏成因,同时结合PKPM进行宏观结构分析。针对典型房屋存在的抗震薄弱点,采取相应的抗震加固措施后进行二次建模验算,并对典型房屋B、C轴等处一层墙体的应力及位移分布情况进行重点分析,以期提高农村房屋的抗震能力。
Masonry Structure is the traditional architectural form in China and is also the main structure form of rural house. The seismic capacity of masonry Structure is lower than reinforced concrete structure and steel structure because of the brittle of masonry Structure's material. Many houses the earthquake stricken area suffered various damage during Lushan Earthquake on April 20 th in 2013, especially masonry houses in rural areas. Based on the survey of the earthquake stricken area and the earthquake disaster character, the typical rural house was selected and modeled to analyse the macro structure by PKPM and analyse the force condition and the cause of destroy by the ANSYS through the data table of the seismic wave. The measures of seismic strengthening were taken to check the model of typical rural house again. The stress and displacement distribution of ground wall on the B and C axes is analyzed emphatically to improve the seismic capacity of rural house and provide effective reference for the construction and reconstruction of rural houses in the future.
Masonry Structure is the traditional architectural form in China and is also the main structure form of rural house. The seismic capacity of masonry Structure is lower than reinforced concrete structure and steel structure because of the brittle of masonry Structure's material. Many houses the earthquake stricken area suffered various damage during Lushan Earthquake on April 20 th in 2013, especially masonry houses in rural areas. Based on the survey of the earthquake stricken area and the earthquake disaster character, the typical rural house was selected and modeled to analyse the macro structure by PKPM and analyse the force condition and the cause of destroy by the ANSYS through the data table of the seismic wave. The measures of seismic strengthening were taken to check the model of typical rural house again. The stress and displacement distribution of ground wall on the B and C axes is analyzed emphatically to improve the seismic capacity of rural house and provide effective reference for the construction and reconstruction of rural houses in the future.
引文
[1] 王震宇.某砌体结构房屋破坏原因分析[D].长沙:中南大学,2010.
[2] 凌桂龙,沈再阳. ANSYS结构单元与材料应用手册[M].北京:清华大学出版社,2013.
[3] 建筑抗震设计规范:GB50011—2010[S].北京:中国建筑工业出版社,2010.
[2] 凌桂龙,沈再阳. ANSYS结构单元与材料应用手册[M].北京:清华大学出版社,2013.
[3] 建筑抗震设计规范:GB50011—2010[S].北京:中国建筑工业出版社,2010.