This paper delves into the lateral load-bearing behavior of lattice-shaped diaphragm wall(LSDW),a novel type of diaphragm wall foundation with many engineering advantages.By employing a double-layer wall structure for...This paper delves into the lateral load-bearing behavior of lattice-shaped diaphragm wall(LSDW),a novel type of diaphragm wall foundation with many engineering advantages.By employing a double-layer wall structure for the first time in laboratory settings,the research presents an innovative testing methodology,complete with novel computational formulas,to accurately measure the responses of LSDW’s inner and outer walls under varying loads.It is found that the Q-s curves of LSDWs exhibit a continuous,progressive deformation and failure characteristic without any abrupt drops,and the standard for judging the horizontal bearing capacity of LSDW foundations should be based on the allowable displacement of the superstructure.The bearing capacity for the double-chamber LSDWs was found to be approximately 1.68 times that of the single-chamber structure,pointing to a complex interplay between chamber number and structural capacity that extends beyond a linear relationship and incorporates the group wall effect.The study also reveals that LSDWs act as rigid bodies with minimal angular displacement and a consistent tilting deformation,peaking in bending moment at about 0.87 of wall depth from the mud surface,across different chamber configurations.Furthermore,it can be found that using the p-y curve method for analyzing the horizontal behavior of LSDW foundations is feasible,and the hyperbolic p-y curve method offers higher accuracy in calculations.These insights offer valuable guidance for both field and laboratory testing of LSDWs and aid in the design and calculation of foundations under horizontal loads.展开更多
General regular shaped diagrid structures can express diverse shapes because braces are installed along the exterior faces of the structures and the structures have no columns. However, since irregular shaped structur...General regular shaped diagrid structures can express diverse shapes because braces are installed along the exterior faces of the structures and the structures have no columns. However, since irregular shaped structures have diverse variables, studies to assess behaviors resulting from various variables are continuously required to supplement the imperfections related to such variables. In the present study, materials elastic modulus and yield strength were selected as variables for strength that would be applied to diagrid structural systems in the form of Twisters among the irregular shaped buildings classified by Vollers and that affect the structural design of these structural systems. The purpose of this study is to conduct sensitivity analysis for axial rotation diagrid structural systems according to changes in brace angles in order to identify the design variables that have relatively larger effects and the tendencies of the sensitivity of the structures according to changes in brace angles and axial rotation angles.展开更多
基金supported by the National Nature Science Foundation of China(Grant No.42007247)the National Foreign Expert Project of China(No.DL2023036001L).
文摘This paper delves into the lateral load-bearing behavior of lattice-shaped diaphragm wall(LSDW),a novel type of diaphragm wall foundation with many engineering advantages.By employing a double-layer wall structure for the first time in laboratory settings,the research presents an innovative testing methodology,complete with novel computational formulas,to accurately measure the responses of LSDW’s inner and outer walls under varying loads.It is found that the Q-s curves of LSDWs exhibit a continuous,progressive deformation and failure characteristic without any abrupt drops,and the standard for judging the horizontal bearing capacity of LSDW foundations should be based on the allowable displacement of the superstructure.The bearing capacity for the double-chamber LSDWs was found to be approximately 1.68 times that of the single-chamber structure,pointing to a complex interplay between chamber number and structural capacity that extends beyond a linear relationship and incorporates the group wall effect.The study also reveals that LSDWs act as rigid bodies with minimal angular displacement and a consistent tilting deformation,peaking in bending moment at about 0.87 of wall depth from the mud surface,across different chamber configurations.Furthermore,it can be found that using the p-y curve method for analyzing the horizontal behavior of LSDW foundations is feasible,and the hyperbolic p-y curve method offers higher accuracy in calculations.These insights offer valuable guidance for both field and laboratory testing of LSDWs and aid in the design and calculation of foundations under horizontal loads.
文摘General regular shaped diagrid structures can express diverse shapes because braces are installed along the exterior faces of the structures and the structures have no columns. However, since irregular shaped structures have diverse variables, studies to assess behaviors resulting from various variables are continuously required to supplement the imperfections related to such variables. In the present study, materials elastic modulus and yield strength were selected as variables for strength that would be applied to diagrid structural systems in the form of Twisters among the irregular shaped buildings classified by Vollers and that affect the structural design of these structural systems. The purpose of this study is to conduct sensitivity analysis for axial rotation diagrid structural systems according to changes in brace angles in order to identify the design variables that have relatively larger effects and the tendencies of the sensitivity of the structures according to changes in brace angles and axial rotation angles.
