摘要
为研究评估方法对量化半刚接钢框架内填暗竖缝RC墙结构(简称PSRCW)超强性能的影响,严格按我国现行抗震规范设计了一栋位于设防烈度为8度区的10层PSRCW标准算例。考虑钢材、钢筋、混凝土强度等材料力学性能的随机性,基于Latin超立方抽样方法将其扩展为40个PSRCW样本算例,采用广义乘方及均匀水平荷载分布模式的循环Pushover方法确定了40个PSRCW样本算例的滞回及骨架曲线,基于概率方法按置信水平为95%的单侧置信下限值确定PSRCW结构的超强系数。随后,选取ATC63规范建议的2组22条近场及远场地震波,对10层PSRCW标准算例进行增量动力时程分析(简称IDA),基于概率法确定了10层PSRCW标准算例的超强系数。分析结果表明:评估方法对量化PSRCW结构超强系数影响显著,考虑材料随机性按广义乘方分布循环Pushover方法确定10层PSRCW标准算例的超强系数为1.3,按均匀分布循环Pushover方法确定的10层PSRCW标准算例的超强系数为1.73。考虑近场及远场地震波随机性按IDA方法确定10层PSRCW标准算例的超强系数分别为2.45和2.42。
To study the influence of different evaluation methods on the overstrength factor of partially-restrained steel frames with concealed vertical slit RC infill walls (PSRCW), a ten-story PSRCW structure located in an area with a fortified aseismic intensity of 8 was designed. The standard PSRCW was extended to 40 PSRCW specimens using the Latin hypercube sampling method, and the randomness of materials (including steel, steel bar, and concrete) was considered. The hysteretic and skeleton curves of 40 PSRCW specimens were obtained using the cyclic pushover method, and the overstrength factor of the PSRCW structure was determined by the probabilistic method at the 95% confidence level. In addition, two groups of 22 near-fault and far-fault earthquake waves recommended by the ATC-63 specification were selected to conduct incremental dynamic analysis (IDA) on the structure;the same probabilistic method was then adopted to evaluate the overstrength factor of this standard PSRCW structure. The evaluation method plays an important role in the overstrength factor of PSRCW structures. The overstrength factors of the PSRCW structure considering the randomness of materials are calculated to be 1.3 and 1.73 by the cyclic pushover method for the generalized power loading distribution mode and the uniform lateral loading distribution mode, respectively. In addition, the overstrength factors of the PSRCW structure considering the randomness of near-fault and far-fault earthquake waves are determined by the IDA method to be 2.42 and 2.45, respectively.
作者
王跃
孙国华
黎明
魏鑫
WANG Yue;SUN Guohua;LI Ming;WEI Xin(Suzhou University of Science and Technology,Suzhou 215011,Jiangsu,China)
出处
《地震工程学报》
CSCD
北大核心
2019年第3期664-671,共8页
China Earthquake Engineering Journal
基金
国家自然科学基金项目(51578355)
江苏省研究生培养创新工程项目(SJLX15-0638)
关键词
半刚接
内填墙
超强系数
循环Pushover分析方法
增量动力时程分析方法
partially-restrained connection
infill wall
overstrength factor
cyclic Pushover analysis method
incremental dynamic analysis (IDA)
