底层大开间框剪封底砌块组合墙房屋抗震性能分析
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摘要
目的应用振型分解反应谱法及弹塑性动力时程分析方法评价底层大开间框剪封底砌块组合墙房屋的抗震性能以及在地震区的应用可能性.方法以试设计的七度区6层房屋为例,采用分离化处理各抗侧单元的简化串并联动力分析模型,应用基于规范的振型分解反应谱法和以地震动记录作为输入的弹塑性动力时程分析方法进行结构的抗震计算,分析结构的薄弱楼层和变形集中问题,在概率统计的基础上分析结构的抗震性能,失效概率和可靠指标.结果过渡楼层为相对薄弱的楼层,强震下未见明显薄弱的楼层和变形集中问题,房屋结构具备良好的抗震性能和合适的抗震可靠指标.结论在七度区建造该类6层房屋是可行的.
The paper attempts to evaluate the seismic performance of bottom-sealed block composite masonry buildings supported by frame/shearwall structure with large spacing in the first storey and discuss the possibility of using them in seismic regions with intensity 7 of Chinese intensity scale.Based on the simplified series-parallel lumped model,with separate treatment of the different earthquake resistant elements as independent analysis elements,the code-based mode decomposition response spectrum method and inelastic time-history analysis by earthquake wave records are used.Statistical response data of a trail designed 6 story building are adopted for the discussions of the seismic performance,weak stories and displacement concentration problems.Failure probability and reliability index are estimated under the theory of seismic reliability.The transient story is a little weaker than others,but no obvious weak story or displacement concentration is found,however,under severe earthquake excitations.Favorable seismic performance and appropriate reliability index are discovered for the buildings.It is feasible to build similar 6-storey buildings in seismic region with intensity 7 of Chinese intensity scale.
The paper attempts to evaluate the seismic performance of bottom-sealed block composite masonry buildings supported by frame/shearwall structure with large spacing in the first storey and discuss the possibility of using them in seismic regions with intensity 7 of Chinese intensity scale.Based on the simplified series-parallel lumped model,with separate treatment of the different earthquake resistant elements as independent analysis elements,the code-based mode decomposition response spectrum method and inelastic time-history analysis by earthquake wave records are used.Statistical response data of a trail designed 6 story building are adopted for the discussions of the seismic performance,weak stories and displacement concentration problems.Failure probability and reliability index are estimated under the theory of seismic reliability.The transient story is a little weaker than others,but no obvious weak story or displacement concentration is found,however,under severe earthquake excitations.Favorable seismic performance and appropriate reliability index are discovered for the buildings.It is feasible to build similar 6-storey buildings in seismic region with intensity 7 of Chinese intensity scale.
引文
[1]张毅斌,张前国,邬瑞锋,等.混凝土小型空心砌块组合墙抗侧力试验研究[J].世界地震工程,2001,17(2):98-103.
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[13]高小旺,薄庭辉,宗志恒.带边框开竖缝钢筋砼底矮墙的试验研究[J].建筑科学,1995(4):24-32.
[14]韦承基,魏琏,高小旺,等.结构抗震弹塑性变形可靠度分析[J].工程力学,1986,3(1):60-70.
[2]Dangol P,Hori N,Nishida T,et al.Experimental andanalytical studies on seismic resisting behaviors ofcomposite block masonry wall[J].Proceedings of theJapan Concrete Institute,2002,24(2):61-66.
[3]Dangol P,Hori N,Inoue N,et al.Analytical studieson seismic resistance of composite block masonry wallby rigid body spring model[J].Journal of StructuralEngineering,2003,B49:243-250.
[4]Dangol P,Hori N,Nishida T,et al.Semi empiricalseismic design formula of composite block masonrywall[J].Proceedings of the Japan Concrete Institute,2003,25(2):37-42.
[5]Nishida T,Teramoto N,Kobayashi J,et al.Seismicresponse estimation of composite masonry structureby equivalent linearization method[C]//Proc of 13thWCEE,Vancouver,Canada:13 WCEE Secretariats,2004:3067-3072.
[6]蔡贤辉,张毅斌,张晶涛.底部框剪封底砌块组合墙房屋的抗震性能[J].沈阳建筑大学学报:自然科学版,2006,22(6):920-924.
[7]邬瑞锋,张志明,解明雨,等.框支和梁支组合墙体的抗侧承载力及刚度[J].工程抗震,1999(1):19-23.
[8]唐岱新,朱本全,王凤来,等.底层大开间框剪组合墙结构1/3比例模型房屋子结构拟动力试验研究[J].建筑结构,2001(4):20-22.
[9]邬瑞锋,张志明,奚肖凤,等.底层大开间框剪组合墙房屋:Ⅰ抗震性能研究[J].建筑结构,1999(11):12-15.
[10]张志明.底层大开间框支组合墙砌体房屋抗震性能研究[D].大连:大连理工大学土木工程学院,1997.
[11]蔡贤辉,邬瑞锋.串并联多质点系模型弹塑性时程分析[J].工程抗震,1997(1):4-8.
[12]魏琏,李德虎.钢筋砼框架层屈服抗剪强度的计算方法[J].建筑结构,1987(6):2-6.
[13]高小旺,薄庭辉,宗志恒.带边框开竖缝钢筋砼底矮墙的试验研究[J].建筑科学,1995(4):24-32.
[14]韦承基,魏琏,高小旺,等.结构抗震弹塑性变形可靠度分析[J].工程力学,1986,3(1):60-70.
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