穿斗式木构架抗侧性能参数计算方法对比  

Comparative Study on Calculation Methods of Lateral Performance Parameters for Chuan-dou StyleWooden Frames

作　　者：王双永[1,2] 邓昊 周海宾[1] WANG Shuang-yong;DENG Hao;ZHOU Hai-bin(Research Institute ofWood Industry,Chinese Academy of Forestry,Beijing 100091,China;International Centre for Bamboo and Rattan,Beijing 100102,China)

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]国际竹藤中心,北京100102

出　　处：《木材科学与技术》2022年第4期63-69,共7页Chinese Journal of Wood Science and Technology

基　　金：内蒙古自治区重点研发计划“装配式井干木结构无沉降横木制造技术研究”(2022YFDZ0002);中国文化遗产研究院开放课题“应县木塔残损木构件修复与加固关键技术”(2022002)。

摘　　要：抗侧性能参数,包括水平抗侧承载力、初始抗侧刚度和延性系数等,是评价穿斗式木构架承受水平荷载(如地震和风荷载)能力的重要指标。以穿斗式木构架为研究对象,以单调加载试验的荷载-位移曲线为例,采用国内外4项标准的方法计算穿斗式木构架的抗侧性能参数,分析不同方法的适用性。GB/T 37745—2019中未给出屈服位移和延性系数的具体定义,仅计算水平抗侧承载力和初始抗侧刚度。结果表明,采用不同方法得到的水平抗侧承载力峰值相同、初始抗侧刚度结果接近,但延性系数存在较大差异。按GB/T 37745—2019方法计算的初始抗侧刚度较其他方法偏低,JGJ/T 101—2015和EN 12512:2005切线法计算的延性系数均大于4.0,按ASTM E 2126-11计算的延性系数为2.5。根据穿斗式木构架的受力特性和荷载-位移曲线的双线性段特征,JGJ/T 101—2015和EN 12512:2005切线法规定的计算方法适用于穿斗式木构架的抗侧性能参数的计算。Lateral performance parameters such as the lateral-resisting capacity,the initial lateral resisting stiffness,and the ductility coefficient are important indicators for evaluating the lateral performance of Chuan-dou style wooden frames.Based on the load-displacement curve of the monotonic loading test of Chuan-dou style wooden frame,the lateral performance parameters were calculated according to different codes and standards respectively.The specific definitions of the yield displacement and the ductility coefficient are not given in GB/T 37745-2019,While only were the initial lateral resisting stiffness and lateral-resisting capacity of the structure calculated according to the definition in this standard.The results showed that the lateral-resisting capacity calculated by different standards was the same,and the initial lateral-resisting stiffness results were similar,however the ductility coefficients were significantly different.The initial lateral-resisting stiffness calculated according to GB/T 37745-2019 is lower than other methods.The ductility coefficient is greater than 4.0 using the calculation method specified in both JGJ/T 101-2015 and EN 12512:2005.The ductility coefficient is 2.5 when the calculation is following the method inASTM E 2126-11.According to the force characteristics of Chuan dou style wooden frame and the bilinear segment characteristics of the load-displacement curve,the methods specified in JGJ/T 101-2015 and EN 12512:2005 are applicable to the calculation of lateral performance parameters of Chuan-dou style wooden frame.

关 键 词：穿斗式木构架 抗侧性能 标准 计算方法 

分 类 号：TU366.2[建筑科学—结构工程] TU502.6