适配于LS-DYNA程序的樟子松木支撑材料强度试验研究
1. 同济大学, 木工工程学院, 上海 200092
2. 中国地震局, 工程力学研究所工程抗震研究中心, 黑龙江哈尔滨 150001
3. 吉林农业大学, 工程技术学院, 吉林长春 130118
| 摘 要： | 应急救援木支撑（ERWS）在防止严重受损或坍塌建筑物二次倒塌中发挥着至关重要的作用。然而，针对中国本地化ERWS材料的力学性能研究尚不充分。本文选取中国应急救援中常用的樟子松木材，研究其在LS-DYNA程序中MAT_WOOD_PINE材料模型的力学参数。首先，开展了樟子松木材的抗拉、抗压及抗剪强度力学性能试验，获取了MAT_WOOD_PINE模型所需的基础力学参数。随后，基于LS-DYNA建立了标准抗压试件模型，获取其应力-应变曲线，并与已有试验结果进行对比验证。然后，构建了二维ERWS结构模型，施加竖向均布荷载，分析其最大竖向承载能力，并与已有试验模型结果进行对比分析。研究结果表明，所获取的樟子松木材强度参数能够有效验证LS-DYNA中MAT_WOOD_PINE模型的准确性，具有较高的可靠性。同时，二维ERWS结构模型的破坏模式与已有试验结果拟合度较高，表明模拟结果合理可靠。所得ERWS的承载力峰值可为实际应急救援中ERWS的设计与应用提供科学的参考依据，为工程救援实践提供有力的技术支持。 |
| 关 键 词： | 应急救援木支撑; 樟子松; 材料力学强度试验; LS-DYNA 程序; MAT_WOOD_PIN模型 |
| DOI： | 10.57237/j.cear.2024.04.002 |
View:
Downloads:
收稿日期: 2024-11-26
接受日期: 2024-12-20
在线出版日期: 2025-01-09
Research on Material Strength Test of Pinus Sylvestris var. Mongolica Wood Supporting Adapted to LS-DYNA Programme
1. College of Civil Engineering, Tongji University, Shanghai 200092, China
2. Engineering Seismic Research Center, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150001, China
3. College of Engineering Technology, Jilin Agriculture University, Changchun 130118, China
| Abstract: | Emergency Rescue Wooden Supports (ERWS) play a crucial role in preventing secondary collapse of severely damaged or partially collapsed structures. However, research on the mechanical properties of localized ERWS materials in China remains insufficient. This study focuses on Pinus sylvestris wood, commonly used in emergency rescue operations in China, to determine the mechanical parameters for the MAT_WOOD_PINE material model in LS-DYNA. First, tensile, compressive, and shear strength tests were conducted to obtain the fundamental mechanical parameters required for the MAT_WOOD_PINE model. Subsequently, a standard compressive specimen model was established in LS-DYNA to derive its stress-strain curve, which was validated against existing experimental results. A two-dimensional ERWS structural model was then developed, subjected to a uniform vertical load, and its maximum vertical load-bearing capacity was analyzed and compared with test results. The findings indicate that the derived strength parameters of Pinus sylvestriswood effectively validate the accuracy and reliability of the MAT_WOOD_PINE model in LS-DYNA. Furthermore, the failure modes of the two-dimensional ERWS model closely align with existing experimental observations, confirming the reasonableness of the simulation results. The peak load-bearing capacity obtained provides a scientific reference for the design and application of ERWS in practical emergency rescue scenarios, offering strong technical support for engineering rescue operations. |
| Keywords: | Emergency Rescue Wood Supports; Pinus Sylvestris var. Mongolica; Material Strength Test; LS-DYNA Program; MAT_WOOD_PIN Model |
基金
| 1. | 吉林省教育厅-科学技术项目 (No. JJKH20240423KJ) |
参考文献
| [1] | Wei Sijia. Self-built house collapse attracts attention to "illegal construction" as a key point of supervision—thoughts from the "April 29" particularly serious residential self-built house collapse accident in Changsha [J], Hunan Province, J. China Emergency Management, 2022(05): 90–93. |
| [2] | O’Connell, John P. “Supporting a Fractured Building.” [J], Fire Engineering, 1995. 148(11): 64–71. |
| [3] | Alistair Swift. UK timber shoring for urban search and rescue [J], Fire journal, 2008. 12(6): 1-9. |
| [4] | Scott Jacob McCord, B. S. Testing of emergency wood shoring towers for use in urban search and rescue operations [J]. 2012. |
| [5] | Ma Wenlong Experimental study on dynamic mechanical properties of pinus sylvestris var. mongolica along and across grain [D]. Northeast Forestry University, 2013. |
| [6] | Niu Qingfang, Meng Xianjie, Li Tieying. Experimental study on the compression properties of wood in the protection of ancient buildings, J. Journal of Taiyuan University of Technology, 2016, 47(05): 623–627. |
| [7] | Yang Gaojie Study on constitutive model of wood under uniaxial compression rate under low strain rate, D. Xian University of Architecture and Technology, 2019. |
| [8] | Defeng Xu, Junwu Dai, Yongqiang Yang, Xuran Weng, Gang Sun. Study on Numerical Simulation of Seismic Collapse of RC Frame Structure with Infilled Wall [J]. Advances in Civil Engineering. 2022, 1–24. |
| [9] | Xu Defeng, Dai Junwu, Chen Limei. Study on the Safety Evaluation Method of Life-Saving Passage in Building Ruins Under the Action of Aftershock, Shock and Vibration, 2023. |
| [10] | Xu Defeng, Dai Junwu, Chen Limei. Study on Construction and Optimization of the Life-saving Passage in Building Ruins Based on Numerical Simulation Method, Shock and Vibration, 2023. |
| [11] | GB/T 1931—2009. 木材含水率测定方法 [S]. 北京: 中国标准出版社, 2009. |
| [12] | GB/T 14017—2009. 木材垂直纹理方向抗拉强度试验方法 [S]. 北京: 中国标准出版社, 2009. |
| [13] | GB/T 1938—2009. 木材平行纹理方向抗拉强度试验方法 [S]. 北京: 中国标准出版社, 2009. |
| [14] | GB/T 1939—2009. 木材垂直纹理方向抗压强度试验方法 [S]. 北京: 中国标准出版社, 2009. |
| [15] | GB/T 1935—2009. 木材平行纹理方向抗压强度试验方法 [S]. 北京: 中国标准出版社, 2009. |
| [16] | GB/T 1939—2009. 木材垂直纹理方向抗剪强度试验方法 [S]. 北京: 中国标准出版社, 2009. |
| [17] | Livermore Software Technology Corporation (LSTC). LS-DYNA Keyword User’s Manual (R11), 2018. |
| [18] | 孟宪杰. 古建筑保护中的木材受压性能试验研究 [D]. 山西: 太原理工大学. |
| [19] | 刘兆广. 地震应急救援支撑结构研究 [D]. 大连:大连理工大学. |
