工程科学学报，第38卷，第1期：149-157,2016年1月 Chinese Journal of Engineering,Vol.38,No.1:149-157,January 2016 DOI:10.13374/j.issn2095-9389.2016.01.020:http://journals.ustb.edu.cn 交叉层积木数值模拟研究以及连接损伤分析 沈银澜，2)，牟在根)，Johannes Schneider'),Siegfried F.Stiemer) 1)北京科技大学土木与环境工程学院，北京1000832)中国电子工程设计院，北京100142 3)英属哥伦比亚大学应用学院土木工程系，温哥华V6T1Z4,加拿大 ☒通信作者，E-mail:zgmu@ces.ustb.cdu.cn 摘要木建筑由于结构冗余性以及钉接节点超强的吸能耗能能力在抗震中表现良好.交叉层积木是一种新型的建筑材 料.本文以交叉层积木3种柔性连接试验为基础，采用OpenSees中Pinching4自定义模型模拟连接滞回曲线的高度非线性、 强度退化、刚度退化和捏拢现象.基于主次半循环累积能量的损伤模型，对交叉层积木连接进行损伤分析，并提出该连接的5 种性能水平的损伤指数.Pinching4模型与连接试验结果吻合较好，进一步证明该模型模拟木节点连接性能的可行性和有效 性.损伤因子对应的损伤程度基本符合试验规律，其平均值在合理范围内，计算结果离散性较低. 关键词交叉层积木结构：连接：数值研究：损伤分析：损伤累积模型 分类号TU398·.6 Numerical simulation study and damage analysis of cross laminated timber connections SHEN Yin-an'2,MU Zai--gen回，Johannes Schneider》,Siegfried F.Stiemer》 1)Schoolof Civil and Environmental Engineering.University of Science and Technology Beijing,Beijing 100083,China 2)China Electronics Engineering Design Institute,Beijing 100142,China 3)Department of Civil Engineering,Faculty of Applied Science,University of British Columbia,Vancouver V6T 174,Canada Corresponding author,E-mail:zgmu@ces.ustb.edu.cn ABSTRACT Due to structural redundancy,strong energy absorption and energy dissipation capacity of nail joints,wood buildings behave good seismic performance in earthquakes.Cross laminated timber is a new generation of engineered wood-based product.Based on tests of three kinds of cross laminated timber connections,Pinching4 model in OpenSees as a user-defined element is applied to simulate the hysteresis response of the connections,which is highly nonlinear,strength degradation,stiffness degradation,and pinc- hing.The primary and follower half-eycle energy damage model is used for damage quantitative analysis of the connections,and the damage factor ranges corresponding to five damage levels of cross laminated timber connections are given in this article.The study shows that good simulation results are obtained and it is also illustrated that Pinching4 model is valid and feasible to predict the hyster- etic response of wood connections.Different damage factors responding to varied damage degrees are consistent with the experimental rules.The dispersion degrees of the damage factors are relatively low with the mean values in the reasonable ranges. KEY WORDS cross laminated timber structures:connections;numerical studies:damage analysis:damage accumulation models 木材是人类较早应用的一种建筑材料.结构的冗作的复合木材-交叉层积木(cross laminated timber,简 余性、较高的强重比以及钉接节点超强的吸能和耗能 称CLT)是一种新型的木建筑材料.它除具有传统的 能力使得木结构有较好的抗震能力.现代技术加工制 木建筑材料的抗震、环保和对气候适应能力强的优点 收稿日期：2014-11-11 基金项目：教育部联合培养研究生基金资助项目(20110901)：国家自然科学基金资助项目(51578064)工程科学学报，第 38 卷，第 1 期: 149--157，2016 年 1 月 Chinese Journal of Engineering，Vol． 38，No． 1: 149--157，January 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 01． 020; http: / /journals． ustb． edu． cn 交叉层积木数值模拟研究以及连接损伤分析 沈银澜1，2) ，牟在根1) ，Johannes Schneider3) ，Siegfried F． Stiemer3) 1) 北京科技大学土木与环境工程学院，北京 100083 2) 中国电子工程设计院，北京 100142 3) 英属哥伦比亚大学应用学院土木工程系，温哥华 V6T 1Z4，加拿大  通信作者，E-mail: zgmu@ ces． ustb． edu． cn 摘 要 木建筑由于结构冗余性以及钉接节点超强的吸能耗能能力在抗震中表现良好． 交叉层积木是一种新型的建筑材 料． 本文以交叉层积木 3 种柔性连接试验为基础，采用 OpenSees 中 Pinching4 自定义模型模拟连接滞回曲线的高度非线性、 强度退化、刚度退化和捏拢现象． 基于主次半循环累积能量的损伤模型，对交叉层积木连接进行损伤分析，并提出该连接的 5 种性能水平的损伤指数． Pinching4 模型与连接试验结果吻合较好，进一步证明该模型模拟木节点连接性能的可行性和有效 性． 损伤因子对应的损伤程度基本符合试验规律，其平均值在合理范围内，计算结果离散性较低． 关键词 交叉层积木结构; 连接; 数值研究; 损伤分析; 损伤累积模型 分类号 TU398 + . 6 Numerical simulation study and damage analysis of cross laminated timber connections SHEN Yin-lan1，2) ，MU Zai-gen1)  ，Johannes Schneider3) ，Siegfried F． Stiemer3) 1) Schoolof Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) China Electronics Engineering Design Institute，Beijing 100142，China 3) Department of Civil Engineering，Faculty of Applied Science，University of British Columbia，Vancouver V6T 1Z4，Canada  Corresponding author，E-mail: zgmu@ ces． ustb． edu． cn ABSTＲACT Due to structural redundancy，strong energy absorption and energy dissipation capacity of nail joints，wood buildings behave good seismic performance in earthquakes． Cross laminated timber is a new generation of engineered wood-based product． Based on tests of three kinds of cross laminated timber connections，Pinching4 model in OpenSees as a user-defined element is applied to simulate the hysteresis response of the connections，which is highly nonlinear，strength degradation，stiffness degradation，and pinc￾hing． The primary and follower half-cycle energy damage model is used for damage quantitative analysis of the connections，and the damage factor ranges corresponding to five damage levels of cross laminated timber connections are given in this article． The study shows that good simulation results are obtained and it is also illustrated that Pinching4 model is valid and feasible to predict the hyster￾etic response of wood connections． Different damage factors responding to varied damage degrees are consistent with the experimental rules． The dispersion degrees of the damage factors are relatively low with the mean values in the reasonable ranges． KEY WOＲDS cross laminated timber structures; connections; numerical studies; damage analysis; damage accumulation models 收稿日期: 2014--11--11 基金项目: 教育部联合培养研究生基金资助项目( 20110901) ; 国家自然科学基金资助项目( 51578064) 木材是人类较早应用的一种建筑材料． 结构的冗 余性、较高的强重比以及钉接节点超强的吸能和耗能 能力使得木结构有较好的抗震能力． 现代技术加工制 作的复合木材--交叉层积木( cross laminated timber，简 称 CLT) 是一种新型的木建筑材料． 它除具有传统的 木建筑材料的抗震、环保和对气候适应能力强的优点