Southwest Jiaotong University

Southwest Jiaotong University Chengdu Design Institute Co., Ltd.

Sichuan Provincial Architectural Design and Research Institute Co.,ltd

Zhixiang Yu

Lei Zhao

Liru Luo

Hu Xu

Shichun Zhao

Yuntao Jin

Xin Qi

Lijun Zhang

Liping Guo

Linxu Liao

Rui Guo

Jiaxin Chen

Jing Xia

Jiahui Tong

Ming Zhang

Qirui Luo

Wenjun Gao

Feng Xiong

Fei He

Shuheng Yang

Jinqiu Qi

Yu Yao

Qiaoling Zhou

Shuwei Chen

Dan Lu

Hao Zhao

Yuanxu Tang

Yangfeng Lyu

Xu Hu

Yongding Tian

Chun Liu

Ziqin Zhong

Shixing Zhao

Lintao Ma

Gaohong Ye

Xiaoyu Yang

A reconsolidated bamboo beam-column joint connected by a subassembly and a design method thereof are provided. Rectangular shear steel plates and vertical steel plates in embedded steel plates form an H-shaped section, and left and right ends of the vertical steel plates are embedded in mortises of a reconsolidated bamboo column and a reconsolidated bamboo beam respectively, thereby effectively improving bearing capacity of the joint. A half tenon is provided with an elliptical bolt hole in a penetrating manner and connected to the reconsolidated bamboo column by a bolt, and the half tenon is rotatable along a center of the elliptical bolt hole and movable along a long axis of the elliptical bolt hole, so that the energy is dissipated through friction between the reconsolidated bamboo half tenon and mortises, excellent energy consumption ability of the half tenon structure is exerted, and the anti-pulling resistance of the tenon is improved.

Reconsolidated bamboo beam-column joint connected by subassembly and design method

The invention relates to the technical field of intelligent construction and maintenance, and relates to a non-contact visual monitoring system and method for a flexible protective structure against rockfall disasters; it comprises a hardware system and a data analysis system, and the hardware system uses a multipoint distributed high-resolution high-speed camera to capture dynamic image sequences of a protective structure under the rockfall impact in a non-contact mode; the data analysis system comprises an impact deformation state full-field tracking module and a multipoint impact large deformation extraction module, and the impact deformation state full-field tracking module captures spatio-temporal changes of impact deformation of the protective system by adopting a full-field optical flow method, constructs a two-dimensional velocity amplitude distribution diagram and performs full-field spatio-temporal tracking of large deformation of the system.

Non-contact visual monitoring system and method for a flexible protective structure against rockfall disaster

A throwing toughness buffer mesh unit for a rockfall protection and a design method of a critical throwing angle thereof are provided. The throwing toughness buffer mesh unit includes a cable column, wherein the cable column is provided with a sliding device on a top end and connected to a foundation structure via a hinged support at a bottom; a support rope, wherein the support rope is connected to the sliding device on the cable column in a sliding way and provided with a spring buffer on an end, wherein the spring buffer is obliquely anchored to a rock mass base near a protection structure; a protection net, which is obliquely hung on the support rope via a connector. A pavement inclination angle of the protection net is adjusted to a critical throwing angle by adjusting a height difference between cable columns to control a throwing track of falling rocks.

Throwing toughness buffer mesh unit for rockfall protection and design method of critical throwing angle thereof

A combined type flexible glass net system used for protection against full-particle falling rocks on plank roads in scenic spots includes a supporting layer, an intercepting throwing layer and a flexible glass net isolating layer, wherein the supporting layer is longitudinally arranged above a protective area along a mountain, and includes a supporting steel frame and an oscillating type supporting rod; the intercepting throwing layer is supported on the supporting layer, and includes metal meshes, an along-cross-slope lower connecting rope, an along-cross-slope upper connecting rope, an along-slope connecting rope and a reinforcing rope; and the flexible glass net isolating layer includes glass plates, glass net supporting cables and a hoop type hinged piece, wherein the glass plates are connected to the glass net supporting cables through the hoop type hinged piece, and the glass net supporting cables are hung below the supporting steel frame.

Combined type flexible glass net system used for protection against full-particle falling rocks on plank roads in scenic sports and mounting method thereof

A calculation method of limit load, deformation and energy dissipating of a ring net panel of a flexible protection net, includes step (1): determining geometrical parameters of the ring net, connection type of steel rings, and diameter of steel wires; step (2): determining a loading rate, a loaded region and a boundary condition of the ring net panel; step (3): obtaining basic mechanical parameters of materials through tests, and establishing a critical damage criterion of the ring net panel; step (4): establishing an equivalent calculation model of a ring net panel based on a fiber-spring unit; and step (5): calculating a puncturing displacement, a puncturing load and energy dissipating of the ring net panel. The method adopts a calculation assumption of load path equivalence.

Calculation and analysis method of limit load, deformation and energy dissipating of ring net panel in flexible protection system

A two-stage energy dissipation type shed tunnel support structure connected by a principle of Dougong and a design method thereof are provided. The two-stage energy dissipation type shed tunnel support structure includes a Dougong joint domain, crossbeams and columns. The Dougong joint domain includes section steel members, wavy-wall cylindrical elastoplastic buffers, U-shaped sliding connecting troughs and high-strength bolts. Multiple layers of the section steel members are orthogonally stacked to form a Dougong shape, the wavy-wall cylindrical elastoplastic buffers are arranged between adjacent layers of the section steel members, and the U-shaped sliding connecting troughs are arranged at upper and lower ends of the wavy-wall cylindrical elastoplastic buffers, which realizes a connection between the wavy-wall cylindrical elastoplastic buffers and a section steel in two orthogonal directions. Under an impact of small energy rockfalls, an elastic deformation of the Dougong joint domain is used to achieve a buffering.

Two-stage energy dissipation type shed tunnel support structure connected by principle of Dougong and a design method thereof

An expandable modular energy-dissipation protection net unit group includes support columns each provided at each of two ends of each support column with a first horizontal longitudinal rotation reversing device on the left side, a second horizontal longitudinal rotation reversing device on the right side and a transverse rotation reversing device on the bottom; a transverse endless support rope, a longitudinal endless support rope and connectors. The transverse endless support rope is wound on the transverse rotation reversing device. The longitudinal endless support rope is wound on the first horizontal longitudinal rotation reversing device and the second horizontal longitudinal rotation reversing device adjacent. A metal net panel is tied by the plurality of connecting members and hung on the transverse endless support rope and the longitudinal endless support rope.

Expandable modular energy-dissipation protection net unit group and protection net system formed by the same

A dry process connected energy-consuming beam column joint based on a corbel includes a prefabricated concrete corbel column, pre-buried steel plates and connecting steel plates, wherein the corbel section of the prefabricated concrete corbel column is stepped, and a notch section of a prefabricated concrete notch beam is matched with the stepped section of the corbel and is in lap joint to the stepped section; the pre-buried steel plates are separately pre-buried on the upper and lower surfaces of the corbel and the prefabricated concrete notch beam, friction plates are arranged outside the pre-buried steel plates, and slight tooth spaces are arranged on the sides, facing the pre-buried steel plates, of the friction plates; and the connecting steel plates are arranged on the left and right sides of the prefabricated concrete notch beam and the corbel lap joint section.

Dry process connected energy-consuming beam column joint based on corbel

An arbitrary-shaped fabricated test block for a high-steep slope rolling stone test includes a connecting square barrel and test block bodies. The connecting square barrel is formed by enclosing steel plates, the steel plates are provided with connecting grooves on a periphery of the steel plates, and the connecting grooves are provided with connecting groove bolt holes. The test block bodies are printed on printing bases by 3D printing technology, connecting plates are fixedly arranged on the printing bases, connecting plate bolt holes are formed in the connecting plates, and high-strength bolts penetrate through the connecting groove bolt holes and the connecting plate bolt holes to connect the test block bodies to the connecting square barrel. A sensor box is fixedly arranged on an inner side of the connecting square barrel, and a sensor is arranged in the sensor box.

Arbitrary-shaped fabricated test block for high- steep slope rolling stone test

Growing community of inventors

Chengdu, China

Zhixiang Yu