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学者姓名：周宏元
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摘要 ：
本发明公开ECC‑建筑固体废弃物柔性组合桥墩防护装置及方法，装置包括若干ECC防护挂板；相邻的两ECC防护挂板可拆卸连接；ECC防护挂板内设有柔性纤维废弃物颗粒填充层。方法包括步骤一、制备ECC防护挂板；步骤二、将纤维布袋粘接在ECC防护挂板的内壁上，并将纤维布袋底部封口；步骤三、将柔性纤维废弃物颗粒填充层填入纤维布袋内；步骤四、清洁桥墩表面，将若干ECC防护挂板与桥墩外壁紧贴；步骤五、通过连接组件将若干ECC防护挂板组装固定。本发明利用ECC高延性的材料属性和柔性纤维散体颗粒脆性破坏吸能的特点，吸收撞击能量，降低撞击力，可同时保护桥墩和车辆的安全，防护装置的耐久度高、绿色环保、废物利用。
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| GB/T 7714 | 周宏元 , 田智 , 陈誉 et al. ECC-建筑固体废弃物柔性组合桥墩防护装置及方法 : CN202310561100.0[P]. | 2023-05-18 . |
| MLA | 周宏元 et al. "ECC-建筑固体废弃物柔性组合桥墩防护装置及方法" : CN202310561100.0. | 2023-05-18 . |
| APA | 周宏元 , 田智 , 陈誉 , 王小娟 , 刘浩 . ECC-建筑固体废弃物柔性组合桥墩防护装置及方法 : CN202310561100.0. | 2023-05-18 . |
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摘要 ：
Due to the unfavorable blast resistance of reinforced concrete (RC) slabs, particularly with the frequent occurrence of penetration and spalling damage, engineered cementitious composite (ECC) provided a promising alternative for enhanced blast resistance through its direct application as a building material or by reinforcing existing RC slabs due to its excellent tensile ductility and toughness. In the present study, the blast resistance of the RC slab, the ECC slab, and the composite slab (RC slab reinforced by ECC layer) was investigated and compared through experimental and numerical approaches. Firstly, the material properties of the ECC were acquired through the quasi-static compressive test, as well as quasi-static and dynamic tensile tests, which felicitated the parameter calibration in the K & C model for ECC. Then the numerical models of the RC slab, the ECC slab, and the RC/ECC composite slab were established and validated with the blast test results. The test and numerical results showed that the ECC and composite slabs exhibited superior anti-blast performance in terms of failure mode, damage extent, and load mitigation compared to the RC slab. Owing to the remarkable ductility and toughness, the ECC and composite slabs could greatly reduce the possibility and severity of penetration and spalling damage. Furthermore, five significant parameters impacting the blast resistance of ECC and composite slabs were summarized through dimensional analysis including the tensile strength of ECC ������t, the total explosive energy Q, the standoff distance R, the slab thickness H, and the slab span L. Then a dimensionless number was proposed to determine the failure mode and predict the residual deflection at the center of the ECC and composite slabs. The results could serve as a reference for the design of ECC and composite slabs to resist blast loading in the field of structural protection.
关键词 ：
Dynamic response Dynamic response Near-field blast Near-field blast Dimensional analysis Dimensional analysis Composite slab Composite slab Structural protection Structural protection ECC slab ECC slab
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| GB/T 7714 | Wu, Jiehao , Wang, Xiaojuan , Zhou, Hongyuan et al. Blast resistance of ECC and composite slabs subjected to near-field explosion [J]. | THIN-WALLED STRUCTURES , 2023 , 189 . |
| MLA | Wu, Jiehao et al. "Blast resistance of ECC and composite slabs subjected to near-field explosion" . | THIN-WALLED STRUCTURES 189 (2023) . |
| APA | Wu, Jiehao , Wang, Xiaojuan , Zhou, Hongyuan , Chen, Yu , Du, Xiuli , Wang, Yonghui et al. Blast resistance of ECC and composite slabs subjected to near-field explosion . | THIN-WALLED STRUCTURES , 2023 , 189 . |
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摘要 ：
To assess the potential for substituting foam concrete with low-carbon foamed geopolymer (FG) in the field of structural protection, a series of quasi-static and dynamic compression tests were conducted. These tests aimed to examine the mechanical performance and energy absorption of FG while considering the factors of FG density, granulated blast furnace slag (GBFS) replacement rate, and water-solid ratio. Additionally, supplementary in-vestigations involving XRD analysis, indentation tests, X-CT scanning, and 3D reconstruction techniques were conducted to explore the influence of GBFS replacement rate on the energy absorption of FG in terms of base material properties and internal pore structure. The results of the quasi-static compressive tests showed that increasing the FG density and reducing the water-solid ratio had a positive effect on energy absorption, however, it also resulted in a notable increase in peak strength. Increasing the GBFS replacement rate not only enhanced the load-bearing capacity but also increased the extent of spalling damage, thus FG with a moderate GBFS replacement rate of 20% demonstrated superior performance in terms of energy absorption and load transfer. Under dynamic compression, all specimens predominantly experienced vertical splitting failure. However, with increasing loading velocity, crushing failure emerged at the two ends of the specimens, particularly in the case of low-density specimens. As the loading velocity increased, the specimen exhibited a significant increase in peak strength, demonstrating a notable strain rate effect, however, the energy absorption of the specimen remained relatively stable without significant alterations. In addition, a simplified DIF was proposed to predict the peak strength of FG with varying densities and two distinct GBFS replacement rates under different strain rates. It provided some valuable insights into the potential application of FG in the field of structural protection.
关键词 ：
Mechanical properties Mechanical properties Foamed geopolymer Foamed geopolymer Energy absorption Energy absorption Dynamic increase factor Dynamic increase factor Dynamic compressive test Dynamic compressive test
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| GB/T 7714 | Wang, Xiaojuan , Cui, Haoru , Zhou, Hongyuan et al. Mechanical properties and energy absorption performance of foamed geopolymer under quasi-static and dynamic compression [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 404 . |
| MLA | Wang, Xiaojuan et al. "Mechanical properties and energy absorption performance of foamed geopolymer under quasi-static and dynamic compression" . | CONSTRUCTION AND BUILDING MATERIALS 404 (2023) . |
| APA | Wang, Xiaojuan , Cui, Haoru , Zhou, Hongyuan , Song, Tianyi , Zhang, Hong , Liu, Hao et al. Mechanical properties and energy absorption performance of foamed geopolymer under quasi-static and dynamic compression . | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 404 . |
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摘要 ：
本发明公开一种抗多灾种可替换式防护构造装置，包括定位钢圈，定位钢圈可拆卸套设在建筑结构柱外侧，定位钢圈上安装有防护结构；防护结构包括若干防护层，若干防护层周向依次安装在定位钢圈上，每个防护层靠近定位钢圈的侧壁上开设有隔热结构。本发明的防护结构安装于地下结构、桥墩等建筑结构柱外围，可减少被保护结构与外界环境的接触，提高地下结构、桥墩等建筑结构柱耐久性。当受火灾、撞击及爆炸荷载作用导致防护结构破坏后，可迅速将其更换，减少了维修的时间，具有很强的经济效益。本发明的防护结构施工方便、成本更低、节能环保，还可以起到抗多灾种效果，更适用于土木工程领域。
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| GB/T 7714 | 周宏元 , 赵鑫宇 , 王小娟 et al. 一种抗多灾种可替换式防护构造装置及其安装方法 : CN202211195413.0[P]. | 2022-09-28 . |
| MLA | 周宏元 et al. "一种抗多灾种可替换式防护构造装置及其安装方法" : CN202211195413.0. | 2022-09-28 . |
| APA | 周宏元 , 赵鑫宇 , 王小娟 , 宋天诣 . 一种抗多灾种可替换式防护构造装置及其安装方法 : CN202211195413.0. | 2022-09-28 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种疏油基地聚物复合发泡剂及其制备方法，属于发泡剂技术领域，复合发泡剂由发泡剂A和发泡剂B组成，其中，所述发泡剂A包括如下的重量的组分：水15～25份、食用胶0.1～0.15份和第一起泡剂0.3～0.6份；所述发泡剂B包括以下重量组分：水20～35份、第二起泡剂1～2.5份和稳泡剂1～1.5份。该发泡剂得到的预制泡沫与植物油、机油、脱模油、油性脱模剂等不相溶，成本较低、工艺简单、起泡效率高、泡沫稳定，节能环保且应用广泛。
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| GB/T 7714 | 王小娟 , 崔浩儒 , 周宏元 et al. 一种疏油基地聚物复合发泡剂及其制备方法 : CN202211189375.8[P]. | 2022-09-28 . |
| MLA | 王小娟 et al. "一种疏油基地聚物复合发泡剂及其制备方法" : CN202211189375.8. | 2022-09-28 . |
| APA | 王小娟 , 崔浩儒 , 周宏元 , 刘浩 . 一种疏油基地聚物复合发泡剂及其制备方法 : CN202211189375.8. | 2022-09-28 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开一种激波管用多功能支撑系统，包括激波管设备，支撑装置包括支撑钢架，支撑钢架设置于激波管设备的靶仓内腔，支撑钢架底面与激波管设备内壁固定连接，支撑钢架的一端伸出激波管的管口，支撑钢架顶面固接有用于传递试件的送样组件和用于对试件进行固定的约束机构，约束机构一侧面通过法兰与激波管设备的激波管固定连接。本发明能够实现目标试件由单一的扁片状材料试件到结构构件的多维度跨越，从材料到构件多层次研究冲击荷载加载目标试件。并且对目标试件的约束条件由单一的四边固支丰富到四边固支和两边固支两边自由的多边界条件。荷载加载方式灵活多变，更真实、全面、有效的模拟建筑结构遭受爆炸荷载的工况。
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| GB/T 7714 | 周宏元 , 吴洁好 , 王小娟 et al. 一种激波管用多功能支撑系统 : CN202211201444.2[P]. | 2022-09-29 . |
| MLA | 周宏元 et al. "一种激波管用多功能支撑系统" : CN202211201444.2. | 2022-09-29 . |
| APA | 周宏元 , 吴洁好 , 王小娟 , 张雪健 . 一种激波管用多功能支撑系统 : CN202211201444.2. | 2022-09-29 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Estimating the reliability of civil structures after earthquake events is a challenging problem because the un-certainties of random variables are usually unknown. This paper presents a data-driven approach for post-earthquake reliability assessments of civil structures. The measured vibration data are used to update the probability density functions of random variables. Two approximate Bayesian computation techniques are introduced to generate the posterior probability density functions of structural parameters. One is the likelihood-free Bayesian inference method, in which the weighted sum of squared errors term in the likelihood function is approximated by a Gaussian process model and the posterior probability density functions is generated using the Metropolis-Hastings algorithm. The second method is the variational inference approach, in which the posterior probability density function is approximated by a Gaussian mixture model. Both the proposed techniques can provide an approximation of the posterior probability density functions of the unknown parameters. Further-more, the updated probability density functions are applied for reliability assessments. Numerical studies on a steel frame structure and a reinforced concrete structure are conducted to verify the accuracy and efficiency of the proposed techniques. Results show that the posterior probability density functions of unknown structural parameters can be updated and the reliability of the structure and components can be estimated.
关键词 ：
Data-driven Data-driven Reliability Reliability Bayesian inference Bayesian inference Variational inference Variational inference Approximate Bayesian computation Approximate Bayesian computation
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| GB/T 7714 | Ni, Pinghe , Han, Qiang , Du, Xiuli et al. Data-driven approach for post-earthquake condition and reliability assessment with approximate Bayesian computation [J]. | ENGINEERING STRUCTURES , 2022 , 256 . |
| MLA | Ni, Pinghe et al. "Data-driven approach for post-earthquake condition and reliability assessment with approximate Bayesian computation" . | ENGINEERING STRUCTURES 256 (2022) . |
| APA | Ni, Pinghe , Han, Qiang , Du, Xiuli , Cheng, Xiaowei , Zhou, Hongyuan . Data-driven approach for post-earthquake condition and reliability assessment with approximate Bayesian computation . | ENGINEERING STRUCTURES , 2022 , 256 . |
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摘要 ：
To take advantage of various types of dynamic measurement data for structural damage detection, an identification strategy based on cross-correlation function with data fusion of various dynamic measurements was proposed to improve the accuracy of damage identification in the present study. First of all, the cross-correlation functions among the easily acquired strain, acceleration, and displacement responses were theoretically derived when the structure was subjected to ambient excitations. Furthermore, an identification strategy was proposed for structural damage detection with the objective function of minimizing the difference between the measured and computed cross-correlation function under multiple unknown ambient excitations. In the proposed strategy, four optimization methods, namely, gradient search, genetic algorithm, particle swarm optimization, and the hybrid method of particle optimization method and gradient search were applied as the search engine to identify structural unknown damage index. Moreover, the performance of the proposed identification strategy was examined by the numerical studies on a two-dimensional and a three-dimensional truss as well as the experimental study on a cantilever beam. These results showed that the cross-correlation function among different types of vibration measurements could significantly improve the accuracy of the identification results, meanwhile, the proposed strategy exhibited excellent robustness to the measurement noise. In addition, the performance of the proposed strategy with different combinations of vibration data and the influence of reference data on the accuracy of damage identification results were further investigated.
关键词 ：
Multiple unknown ambient excitations Multiple unknown ambient excitations Data fusion Data fusion Structural damage detection Structural damage detection Intelligent optimization algorithm Intelligent optimization algorithm Cross -correlation function Cross -correlation function
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| GB/T 7714 | Wang, Xiaojuan , Chen, Feng , Zhou, Hongyuan et al. Structural damage detection based on cross-correlation function with data fusion of various dynamic measurements [J]. | JOURNAL OF SOUND AND VIBRATION , 2022 , 541 . |
| MLA | Wang, Xiaojuan et al. "Structural damage detection based on cross-correlation function with data fusion of various dynamic measurements" . | JOURNAL OF SOUND AND VIBRATION 541 (2022) . |
| APA | Wang, Xiaojuan , Chen, Feng , Zhou, Hongyuan , Ni, Pinghe , Wang, Lihui , Zhang, Jian . Structural damage detection based on cross-correlation function with data fusion of various dynamic measurements . | JOURNAL OF SOUND AND VIBRATION , 2022 , 541 . |
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摘要 ：
陶粒泡沫混凝土的力学性能及吸能特性
关键词 ：
破坏模式 破坏模式 压实应变 压实应变 强度匹配 强度匹配 陶粒泡沫混凝土 陶粒泡沫混凝土 能量吸收 能量吸收 抗压强度 抗压强度
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| GB/T 7714 | 王小娟 , 刘路 , 贾昆程 et al. 陶粒泡沫混凝土的力学性能及吸能特性 [J]. | 王小娟 , 2021 , 24 (1) : 207-215 . |
| MLA | 王小娟 et al. "陶粒泡沫混凝土的力学性能及吸能特性" . | 王小娟 24 . 1 (2021) : 207-215 . |
| APA | 王小娟 , 刘路 , 贾昆程 , 周宏元 , 建筑材料学报 . 陶粒泡沫混凝土的力学性能及吸能特性 . | 王小娟 , 2021 , 24 (1) , 207-215 . |
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摘要 ：
以快硬硫铝酸盐水泥为结合剂,与陶粒、预制泡沫混合制备得到陶粒泡沫混凝土.探讨了泡沫混凝土密度与陶粒粒径匹配关系对陶粒泡沫混凝土在静态单轴压缩下的破坏模式、抗压强度、压实应变和能量吸收的影响.结果表明:随着泡沫混凝土密度的提高或陶粒粒径的增大,陶粒泡沫混凝土发生非界面破坏的现象逐渐显著,由此确定出与3种粒径陶粒相匹配的泡沫混凝土的密度范围;随着泡沫混凝土密度的提高,陶粒泡沫混凝土的抗压强度和能量吸收能力均显著提高,压实应变随之减小;随着陶粒粒径的增大,陶粒泡沫混凝土的抗压强度先增后减,压实应变先减后增,能量吸收能力逐渐增强.
关键词 ：
强度匹配 强度匹配 能量吸收 能量吸收 破坏模式 破坏模式 抗压强度 抗压强度 陶粒泡沫混凝土 陶粒泡沫混凝土 压实应变 压实应变
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| GB/T 7714 | 王小娟 , 刘路 , 贾昆程 et al. 陶粒泡沫混凝土的力学性能及吸能特性 [J]. | 建筑材料学报 , 2021 , 24 (01) : 207-215 . |
| MLA | 王小娟 et al. "陶粒泡沫混凝土的力学性能及吸能特性" . | 建筑材料学报 24 . 01 (2021) : 207-215 . |
| APA | 王小娟 , 刘路 , 贾昆程 , 周宏元 . 陶粒泡沫混凝土的力学性能及吸能特性 . | 建筑材料学报 , 2021 , 24 (01) , 207-215 . |
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