西安建筑科技大学学报(自然科学版)

研究定量分析了不同加固方法的经济与碳排放指标并指出ECC覆面加固穿斗式木构架民居结构是一种经济、环保的绿色低干预加固方法.基于带填充墙的燕尾榫穿斗式木构架与木楼板砌体墙抗震试验建立数值模型,讨论了模拟方案的可靠性.由此建立了典型云南村镇民居带填充墙穿斗式木构架模型,分析讨论了ECC单面加固对结构的平面内与平面外抗震性能的影响,并对不同损伤状态下结构的平面外加固效果进行了研究.结果表明:ECC单面加固能抑制裂缝的产生与发展,提高结构的延性; 加固后结构平面内承载力提升2.7%,平面外承载力提升178.5%; ECC单面加固对轻微和中等损伤的带填充墙穿斗式木构架平面外抗倒塌性能较好,为ECC在农村民居维修、加固工程中的应用提供了依据.

The economic and carbon emission indexes of different reinforcement methods were quantitatively analyzed, and it was pointed out that ECC structure was an economical, environmentally friendly and green reinforcement method with low intervention. The reliability of the simulation scheme was discussed based on the seismic test results of the wooden structure with dovetail joint and wooden floor masonry wall. A FE model of a typical column-and-tie wooden structure with infilled walls in Yunnan was established. The influence of the in-plane and out-of-plane seismic performance of the structure with ECC strengthening was analyzed and discussed, and the out-of-plane reinforcement effect of the structure under different damage states was also studied. The results indicated that the ECC strengthening could effectively reduce the cracks and improve the structure ductility. The in-plane and the out-of-plane bearing capacity of the reinforced structure was increased by 2.7% and 178.5%, respectively. ECC single-sided reinforcement has better out-of-plane collapse resistance to slightly and moderately damaged column-and-tie wooden structures with infilled walls, which provided a basis for the application of ECC in rural residential maintenance and reinforcement projects.

引言
1 带填充墙的穿斗式木构架数值模型
2 带填充墙穿斗式木构架数值模拟研究
3 ECC单面加固填充墙数值模拟
4 不同损伤程度下的加固后结构平面外抗倒塌模拟研究
5 结论

图1 填充墙模型
Fig.1 Infilled wall models

表1 塑性损伤模型中塑性参数取值<br/>Tab.1 Values of plastic parameters of CDPM

表1 塑性损伤模型中塑性参数取值
Tab.1 Values of plastic parameters of CDPM

图2 带填充墙的木框架拟静力试验试件KJ-1试件设计图<br/>Fig.2 Design drawing of kJ-1 specimen for pseudo-static test specimen wood frame with infilled wall

图2 带填充墙的木框架拟静力试验试件KJ-1试件设计图
Fig.2 Design drawing of kJ-1 specimen for pseudo-static test specimen wood frame with infilled wall

图3 试件KJ-1试验和模拟结果比较<br/>Fig.3 Comparison of test and simulation results of KJ-1 specimen

图3 试件KJ-1试验和模拟结果比较
Fig.3 Comparison of test and simulation results of KJ-1 specimen

图4 砌体墙试件W1尺寸<br/>Fig.4 W1 size of masonry wall specimen

图4 砌体墙试件W1尺寸
Fig.4 W1 size of masonry wall specimen

图5 砌体墙平面外荷载-位移曲线比较<br/>Fig.5 Comparison of out-of-plane load-displacement curves of masonry wall

图5 砌体墙平面外荷载-位移曲线比较
Fig.5 Comparison of out-of-plane load-displacement curves of masonry wall

图6 一榀带填充墙框架的足尺模型<br/>Fig.6 A full scale model with infilled wall frame

图6 一榀带填充墙框架的足尺模型
Fig.6 A full scale model with infilled wall frame

表2 杉木物理力学性能参数<br/>Tab.2 Physical and mechanical properties of Chinese fir

表2 杉木物理力学性能参数
Tab.2 Physical and mechanical properties of Chinese fir

图7 一榀带填充墙穿斗式木构架平面内循环加载模拟结果<br/>Fig.7 Simulation results of in-plane cyclic loading of a column-and-tie wooden structure with infilled wall

图7 一榀带填充墙穿斗式木构架平面内循环加载模拟结果
Fig.7 Simulation results of in-plane cyclic loading of a column-and-tie wooden structure with infilled wall

图8 一榀带填充墙穿斗式木构架平面外静力推覆模拟结果<br/>Fig.8 Simulation results of out-of-plane loading of a column-and-tie wooden structure with infilled wall

图8 一榀带填充墙穿斗式木构架平面外静力推覆模拟结果
Fig.8 Simulation results of out-of-plane loading of a column-and-tie wooden structure with infilled wall

图9 ECC应力-应变曲线<br/>Fig.9 ECC stress-strain curve

图9 ECC应力-应变曲线
Fig.9 ECC stress-strain curve

表3 ECC性能参数<br/>Tab.3 ECC Performance Parameters

表3 ECC性能参数
Tab.3 ECC Performance Parameters

图10 ECC单面加固平面内加载<br/>Fig.10 In-plane loading with ECC single-side reinforcement

图10 ECC单面加固平面内加载
Fig.10 In-plane loading with ECC single-side reinforcement

图11 ECC单面加固平面外加载<br/>Fig.11 Out-of-plane loading with ECC single-side reinforcement

图11 ECC单面加固平面外加载
Fig.11 Out-of-plane loading with ECC single-side reinforcement

图12 不同损伤状态下ECC单面加固结构模拟<br/>Fig.12 ECC single-side strengthened structure modelling under different damage levels

图12 不同损伤状态下ECC单面加固结构模拟
Fig.12 ECC single-side strengthened structure modelling under different damage levels

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备注

引言

1 带填充墙的穿斗式木构架数值模型

2 带填充墙穿斗式木构架数值模拟研究

3 ECC单面加固填充墙数值模拟

4 不同损伤程度下的加固后结构平面外抗倒塌模拟研究

5 结论

期刊信息