| 基于统一强度理论的生态复合墙体等效斜压杆宽度计算 |
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| 引用本文： | 陈国新,黄炜,姚谦峰,俞茂宏,侯莉娜,田英侠.基于统一强度理论的生态复合墙体等效斜压杆宽度计算[J].工程力学,2010(2). |
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| 作者姓名： | 陈国新 黄炜 姚谦峰 俞茂宏 侯莉娜 田英侠 |
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| 作者单位： | 西安建筑科技大学土木工程学院;新疆农业大学水利与土木工程学院;西安交通大学人居环境与建筑工程学院;西安工业大学建筑工程系; |
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| 基金项目： | 国家自然科学基金项目(50578011);;陕西省自然科学基金研究项目(陕科[2004]68号);;陕西省教育厅自然科学专项基金项目(06JK256、06JK264) |
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| 摘 要： | 结合前期框格和复合墙体的试验研究结果,分析生态填充砌块与框格的受力特性;采用考虑中间主应力σ2影响、拉压性能不同且适用于各种材料复杂应力状态下的双剪统一强度理论,推导简化计算模型中等效斜压杆的宽度表达式,并与试验值进行对比,验证理论计算结果的精确性。此表达式可为复合墙体中填充不同生态块材计算等效宽度提供统一解;有限元数值结果和试验值吻合较好。该模型可用来分析生态复合墙体的动力反应特性。
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| 关 键 词： | 生态复合墙体 双剪统一强度理论 框格 计算模型 斜压杆宽度 |
THE WIDTH OF EQUIVALENT OBLIQUE COMPRESSION STRUT OF ECOLOGICAL COMPOSITE WALL BASED ON TWIN SHEAR UNIFIED STRENGTH THEORY |
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| Abstract: | According to the experimental data of frame grids and composite walls, the paper analyzes the mechanical characteristics of the ecological filled blocks and frame grids. The twin shear unified strength theory is adopted, in which the influence of intermediate principal stress σ2 is considered and it is applied to various materials of different performance in tension and compression under complex stress state. Based on the unified strength theory, the width expression of equivalent oblique compression strut is deduced, and the calculated values and experimental values are compared. The results show that the width expression works for ecological composite wall filled with different ecological materials, and the numerical results agree well with experimental ones. Inaddition, this model is capable of analyzing the dynamic characteristics of composite walls. |
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| Keywords: | ecological composite wall twin shear unified strength theory frame grid calculation model the width of compression strut |
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