Seismic response analysis of frame structure with uneven settlement of foundation

Bao, Chao; Xu, Fangze; Chen, G.; Zhang, S.R.; Lim, Kar Sing; Ma, Xiaotong; Hamid, N. H.

doi:10.1016/j.pce.2020.102928

Cited by 10 publications

(3 citation statements)

References 22 publications

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“…Uneven settlement of foundations is one of the main factors leading to damage to building structures, dynamic changes in structural loading conditions and changes in the environment caused by changes in the undercropping of foundations are causing this uneven settlement (Chen and Hanna, 2023;Wu et al, 2022). The degree to which a building is affected by uneven settlement is related to its own characteristics, the greater the stiffness of the building, the poor coordination of deformation, the greater the effect of uneven settlement on it (Chen et al, 2011;Al' Malul and Michail, 2018;Bao et al, 2020;Wang et al, 2022). Therefore, for structures with large stiffness, the uneven settlement of foundations should be strictly controlled, which is not only reflected in general buildings, but also for the uneven settlement of high-speed railroad foundations, which should be paid more attention to (Zhang et al, 2023;Liu and Moore, 2021;Zhang et al, 2021;Shi et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…When detecting and analyzing the uneven settlement of building foundations, the traditional detection method has the problems of large error and long time (Liu et al, 2020). Uneven settlement of foundations is one of the common engineering quality problems in wetted loess areas, and it was found that changes in settlement area and settlement volume in wetted loess areas have no significant effect on the interlayer displacement ratio (Bao et al, 2020;Xu et al, 2022;Ho and Kuwano, 2021). Underground pipe corridors are not only affected by uneven settlement but also by ground cracks.…”

Section: Introductionmentioning

confidence: 99%

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Study on deformation characteristics of underground pipeline corridors and uneven settlement factors of foundations in sandy chalky soil layer

Zhang,

Duan,

et al. 2024

Front. Earth Sci.

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Uneven settlement phenomenon is very easy to occur in the sandy pulverized ground stratum, the underground pipe corridor longitudinal and transverse stiffness difference is obvious, so that it is easy to crack and deformation due to uneven settlement in this type of stratum. This paper carries out research on uneven settlement and cracking and deformation of Qihe tube corridor, analyzes the reasons leading to uneven settlement and the factors affecting the deformation and cracking of the tube corridor, and provides guidance for foundation treatment and tube corridor repair and mixing and reinforcement. It was found that the concrete structure of the corridor itself had exposed reinforcement, pockmarks and holes, and that cracks on the structure of the corridor sprouted and expanded from these defects. Defects and damages on the concrete structure of the pipeline corridor are contributing factors to the deformation and cracking of the members, and the uneven settlement of the foundation is the main initiating factor for the cracking and deformation. The analysis of the numerical simulation results of similar underground pipeline corridors is carried out, and it is found that the simulation results are consistent with the deformation characteristics of the Qihe pipeline corridor, which further supports the conclusions of this paper. The main stratigraphic factors contributing to the inhomogeneous settlement were found to be the water-rich and loose bodies in the lower part of the strata, as revealed by the physical means and the experimental verification boreholes. Localized hydraulic effects such as pumping further accelerate the uneven settlement of the foundation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on deformation characteristics of underground pipeline corridors and uneven settlement factors of foundations in sandy chalky soil layer

Zhang,

Duan,

et al. 2024

Front. Earth Sci.

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“…Moreover, loess is vulnerable to erosion [ 7 ], and the formation of a large number of gullies provides a prerequisite for the occurrence of secondary disasters [ 8 , 9 , 10 , 11 ]. In addition, due to the loess’s unique structure, the loess area’s geological environment is extremely fragile; thus, engineering problems such as foundation settlement and tunnel collapse are often encountered [ 12 , 13 , 14 ]. Therefore, it is vital to improve the properties of loess so that it can better meet engineering requirements.…”

Section: Introductionmentioning

confidence: 99%

Study on Improving Loess Properties with Permeable Polymer Materials

Zhuang

Kong

et al. 2022

Polymers

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Loess has strong water sensitivity, strong collapsibility, and low strength resulting in failures such as landslides, due to its loose structure. In order to improve the loess characteristics and to better meet the needs of engineering, a colorless, transparent, and permeable composite material is proposed in this paper. Water stability, erosion, unconfined compression, and triaxial tests were conducted to investigate the change of the strength properties and soil erosion resistance. The water sensitivity and strength properties of the loess are significantly improved as the stabilizer concentration increases. When scoured for 20 min, the erosion rates of the reinforced and the unreinforced soil were 95% and 6.25%, respectively, and demonstrated a 15.12 times reduction in erosion rates. The optimal concentration of the mixed solution is 0.6%. The triaxial test, CT, and SEM scanning tests were used to reveal the intrinsic mechanisms. The results demonstrated that the internal friction angle of the reinforced soil increases from 28.09° to 30.57°, and the cohesion changes from 25 kPa to 37.4 kPa. A large number of pores with a diameter of 900–1000 μm are reduced to 0–200 μm, and some pores with a length greater than 600 μm reduce to a length of less than 200 μm; The agglomeration and cementation, the filling of pores, and the formation of membrane structures have contributed greatly to the improvement of loess properties. Furthermore, the newly composite material has significant application potential needed to stabilize soil.

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Mechanical behavior and microstructure evolution of Malan loess under dynamic compaction

Ni,

Nie,

Lü

et al. 2024

Environ Earth Sci

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Seismic response analysis of frame structure with uneven settlement of foundation

Cited by 10 publications

References 22 publications

Study on deformation characteristics of underground pipeline corridors and uneven settlement factors of foundations in sandy chalky soil layer

Study on deformation characteristics of underground pipeline corridors and uneven settlement factors of foundations in sandy chalky soil layer

Study on Improving Loess Properties with Permeable Polymer Materials

Mechanical behavior and microstructure evolution of Malan loess under dynamic compaction

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