The development of society is closely related to peoples needs. With the promotion of modern society, peoples requirements for environmental protection, energy saving, safety and other performance of things are gettin...The development of society is closely related to peoples needs. With the promotion of modern society, peoples requirements for environmental protection, energy saving, safety and other performance of things are getting higher and higher. In recent years, Chinas construction industry has developed rapidly, but due to the quality of buildings and geological disasters, the phenomenon of building collapse is common. Therefore, how to improve the seismic performance of the prefabricated structure has become a current research hotspot. This paper takes prefabricated structure as the starting point, explains its concept and introduces related categories, then summarizes the seismic performance research process of prefabricated structure, and finally illustrates the current research direction and considerations of seismic performance. The full text aims to provide suggestions for the development of the prefabricated structure through a comprehensive combing.展开更多
With the continuous improvement of China's scientific and technological level, all kinds of new technologies are gradually developed and applied to the construction industry. Among them, the construction technolog...With the continuous improvement of China's scientific and technological level, all kinds of new technologies are gradually developed and applied to the construction industry. Among them, the construction technology of external wall board is applied more in the prefabricated building structure of the house construction project. Because the prefabricated building structure has good adaptability, whether the construction quality is qualified determines the safety and stability of the whole house construction project. Therefore, in the construction process, it is necessary to strictly control the construction technology of assembling building structure external wall panels to ensure their standardization. Based on this, this paper briefly analyzes the construction technology of external wall panels for assembled building structures, and discusses the key points of construction for reference.展开更多
To address the insufficient stiffness of the V-shaped reinforced concrete folded plate structure and its construction process causing environmental pollution,a novel assembled monolithic spherical-shaped reinforced co...To address the insufficient stiffness of the V-shaped reinforced concrete folded plate structure and its construction process causing environmental pollution,a novel assembled monolithic spherical-shaped reinforced concrete ribbed folded plate structure(AMRRFS)was proposed.The advantages of AMRRFS are that its construction process is environmentally friendly while it also exhibits great stability and rigidity.Therefore,an experimental and numerical investigation were conducted on the AMRRFS to investigate its mechanical properties.In addition,the parametric analysis of the AMRRFS was conducted,and some design recommendations were proposed.Under the design load,the experimental findings revealed that AMRRFS possessed excellent mechanical properties.During the overloading phase,the interface between the in situ casting area and the prefabrication area was severely damaged,leading to the loss of the structure’s ability to bear loads.The outcomes from the finite element simulations of AMRRFS closely mirrored the results of the experimental investigation.Based on the parametric analysis,it was recommended that the height of the AMRRFS,the height of the ribs,and the height of the secondary ridge beams shall be 1/7–1/5,1/65–1/50,and 1/34–1/30 of the span,and that the minimum reinforcing ratio for all types of plates shall exceed 1.0%.展开更多
This paper introduces a new prefabricated recyclable double-row piles retaining system for excavations in silty clay ground.Laboratory model test and numerical simulation are conducted to study the system behavior upo...This paper introduces a new prefabricated recyclable double-row piles retaining system for excavations in silty clay ground.Laboratory model test and numerical simulation are conducted to study the system behavior upon excavation.The horizontal displacement(δ_(h)),Von Mises stress(δ_(M)),strain(ε),ground surface settlement(δ_(v)),and earth pressure are systematically investigated.Furthermore,the monitoring data of 13 excavation cases supported by double-row piles retaining system are presented and discussed.The experimental results can basically match the numerical results,and the maximumδ_(M),maximum bending moment(M_(max)),maximum horizontal displacement(δ_(hm))of structural members are all less than the tolerance limits.The ground surface settlement model of double-row piles retaining system consists of three zones,i.e.,rebound influence zone,primary influence zone and secondary influence zone.The dhm values are 0.07%–1.42%of the excavation depth(He).The maximum ground surface settlement(δ_(vm))is generally less than dhm.The ratio ofδ_(vm)=δ_(hm)varies between 0.09 and 0.76,with an average value of 0.5.The observed earth pressure on the retained side of front pile(paf)is about 0.53–0.57γH below the excavation surface.Above the excavation surface,p_(af)decreases dramatically when getting closer to the ground surface.展开更多
文摘The development of society is closely related to peoples needs. With the promotion of modern society, peoples requirements for environmental protection, energy saving, safety and other performance of things are getting higher and higher. In recent years, Chinas construction industry has developed rapidly, but due to the quality of buildings and geological disasters, the phenomenon of building collapse is common. Therefore, how to improve the seismic performance of the prefabricated structure has become a current research hotspot. This paper takes prefabricated structure as the starting point, explains its concept and introduces related categories, then summarizes the seismic performance research process of prefabricated structure, and finally illustrates the current research direction and considerations of seismic performance. The full text aims to provide suggestions for the development of the prefabricated structure through a comprehensive combing.
文摘With the continuous improvement of China's scientific and technological level, all kinds of new technologies are gradually developed and applied to the construction industry. Among them, the construction technology of external wall board is applied more in the prefabricated building structure of the house construction project. Because the prefabricated building structure has good adaptability, whether the construction quality is qualified determines the safety and stability of the whole house construction project. Therefore, in the construction process, it is necessary to strictly control the construction technology of assembling building structure external wall panels to ensure their standardization. Based on this, this paper briefly analyzes the construction technology of external wall panels for assembled building structures, and discusses the key points of construction for reference.
基金the financial support from the National Natural Science Foundation of China(Grant No.51568012)the Scientific Research Foundation of Guizhou University(GuiDaRenJiHeZi[2023]14)+1 种基金the Science Foundation for Youths of Education Commission of Guizhou Province(QianJiaoJi[2024]020)the Basic Research Project of Guizhou University(GuiDajiChu[2024]18).
文摘To address the insufficient stiffness of the V-shaped reinforced concrete folded plate structure and its construction process causing environmental pollution,a novel assembled monolithic spherical-shaped reinforced concrete ribbed folded plate structure(AMRRFS)was proposed.The advantages of AMRRFS are that its construction process is environmentally friendly while it also exhibits great stability and rigidity.Therefore,an experimental and numerical investigation were conducted on the AMRRFS to investigate its mechanical properties.In addition,the parametric analysis of the AMRRFS was conducted,and some design recommendations were proposed.Under the design load,the experimental findings revealed that AMRRFS possessed excellent mechanical properties.During the overloading phase,the interface between the in situ casting area and the prefabrication area was severely damaged,leading to the loss of the structure’s ability to bear loads.The outcomes from the finite element simulations of AMRRFS closely mirrored the results of the experimental investigation.Based on the parametric analysis,it was recommended that the height of the AMRRFS,the height of the ribs,and the height of the secondary ridge beams shall be 1/7–1/5,1/65–1/50,and 1/34–1/30 of the span,and that the minimum reinforcing ratio for all types of plates shall exceed 1.0%.
基金supported by the National Key Research and Development Program of China(Grant No.2021YFC3100803)the National Natural Science Founda tion of China(Grant Nos.52208380 and 52078506)+2 种基金the Guangdong Basic and Applied Basic ResearchFoundation,China(Grant No.2023A1515012159)Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences(Grant No.SKLGME021022)the Science and Technology Program of Guangzhou Municipal Construction Group Co.,Ltd.,China(Grant No.2022-KJ004).
文摘This paper introduces a new prefabricated recyclable double-row piles retaining system for excavations in silty clay ground.Laboratory model test and numerical simulation are conducted to study the system behavior upon excavation.The horizontal displacement(δ_(h)),Von Mises stress(δ_(M)),strain(ε),ground surface settlement(δ_(v)),and earth pressure are systematically investigated.Furthermore,the monitoring data of 13 excavation cases supported by double-row piles retaining system are presented and discussed.The experimental results can basically match the numerical results,and the maximumδ_(M),maximum bending moment(M_(max)),maximum horizontal displacement(δ_(hm))of structural members are all less than the tolerance limits.The ground surface settlement model of double-row piles retaining system consists of three zones,i.e.,rebound influence zone,primary influence zone and secondary influence zone.The dhm values are 0.07%–1.42%of the excavation depth(He).The maximum ground surface settlement(δ_(vm))is generally less than dhm.The ratio ofδ_(vm)=δ_(hm)varies between 0.09 and 0.76,with an average value of 0.5.The observed earth pressure on the retained side of front pile(paf)is about 0.53–0.57γH below the excavation surface.Above the excavation surface,p_(af)decreases dramatically when getting closer to the ground surface.
