residual behavior of welded hollow spherical joints after

Axial compression properties of welded hollow spherical

Jun 01, 2020 · Test on welded hollow spherical joints with H-beams under high temperature. Axial compressive mechanical behavior and failure mode were obtained. Finite element analysis was presented and verified by test data. The parametric analysis of welded hollow spherical joints at high temperature is conducted.

Behavior of welded hollow spherical joints after exposure

Jan 01, 2018 · In this paper, experimental and numerical studies were conducted to reveal the residual structural behavior of welded hollow spherical joints after fire exposure. Axial compressive tests were performed on eight joint specimens after exposure to the ISO-834 standard fire (including both heating and cooling phases), and three highest fire temperatures, i.e., 600 °C, 800 °C, and 1000 °C, were Comparison of residual stress on different three Zhao, Z, Zhu, H, Chen, Z. Mechanical behavior of single-layer reticulated shell connected by welded hollow spherical joints with considering welding residual stress. Weld World 2016; 60:61 69. Google Scholar Crossref

Comparison of residual stress on different three

Zhao, Z, Zhu, H, Chen, Z. Mechanical behavior of single-layer reticulated shell connected by welded hollow spherical joints with considering welding residual stress. Weld World 2016; 60:61 69. Google Scholar Crossref Experimental Study on Constant-Amplitude Fatigue The grid structure with welded hollow spherical joints (WHSJs) is widely used in industrial buildings with suspended cranes. Cyclic loadings generated by the suspended cranes could result in the fatigue failure of WHSJs. However, a corresponding fatigue design method has not been established. This paper presents an experimental study on the fatigue performance of the weld toe in the steel tube

Experimental Study on Residual Mechanical Properties of

Xue, S. D., & Qiu, L. (2011). Experimental investigation on compression performance of welded hollow spherical joints in fire. Journal of Building Structures, 32(2), 113119. (in Chinese). Google Scholar Failure mechanism and practical load-carrying capacity hollow spherical joints under compressive load, and determined that joint connected with many members can be simplified into joint with single member. Some scholars researched effects of weld on capacity, and dynamic behaviour. Tests on joint were all limited by material graded Q235. The number of experiment of joint mad from Q345 was very small.

Failure mechanism and practical load-carrying capacity

hollow spherical joints under compressive load, and determined that joint connected with many members can be simplified into joint with single member. Some scholars researched effects of weld on capacity, and dynamic behaviour. Tests on joint were all limited by material graded Q235. The number of experiment of joint mad from Q345 was very small. Fan Wang Scientific.NetAbstract:Joints stiffness has important influence on the stability behavior of large-span spatial reticulated shell. In this paper, the nonlinear beam-column element with end springs is taken as the analysis model of members of single-layer reticulated shell, the whole process of nonlinear stability for single-layer reticulated shell is analyzed with the software ANSYS, the influence of

Fatigue performance and life prediction methods research

The grid structures with welded hollow spherical joint (WHSJ) have gained increasing popularity for use in industrial buildings with suspended cranes, and usually welded with steel tube (ST). The fatigue performance of steel tube-welded hollow spherical joint (ST-WHSJ) is however not yet well characterized, and there is little research on fatigue life prediction methods of ST-WHSJ. Fatigue performance and life prediction methods research The grid structures with welded hollow spherical joint (WHSJ) have gained increasing popularity for use in industrial buildings with suspended cranes, and usually welded with steel tube (ST). The fatigue performance of steel tube-welded hollow spherical joint (ST-WHSJ) is however not yet well characterized, and there is little research on fatigue life prediction methods of ST-WHSJ.

Fire performances of space grid structures

welded hollow spherical joints under fire. Six joints were simulated under axial pressure or tension of five different load ratios which are the ratios of the real bearing loads and the design loads, repsectively. For each joint, three reference points shown in Figure 1 Flexural capacity and bending stiffness of welded hollow Eight specimens were designed, and pure bending tests were completed to study the mechanical properties of welded hollow spherical joints (WHS joints) with an

Form and Force 2019 - CIMNE

Residual bearing capacity of welded hollow spherical joints after corrosion damage. Huiyun Chen, Hongbo Liu and Zhihua Chen. Abstract. A comparative study of the structural performance of different types of reticulated dome subjected to distributed loads. W. Gythiel, C. Mommeyer, T. Raymaekers and M. Schevenels. Abstract Hongbo Liu's research works Tianjin University, Tianjin Understanding the post-fire residual behavior of welded hollow spherical joints is crucial for fire damage assessment of the space lattice structures. However, the post-fire behavior of welded

International Journal of Steel Structures Online first

Nov 19, 2020 · Post-Fire Exposure Behavior of Circular Concrete-filled Steel Tube Column under Axial Loading Residual Bearing Capacity of Damaged Large-Diameter Drum-Welded Spherical Joints Post Disaster Authors (first, second and last of 4) Hongbo Liu Failure Pressure of Welded Hollow Spherical Joints Containing Grooving Corrosion Defects and Wall Jie LU PhD Tianjin University, Tianjin tju School Welded hollow spherical joint is an extremely widely used connection pattern in space lattice structures. Understanding the behavior of the welded hollow spherical joint after elevated-temperature

LOAD-CARRYING CAPACITY AND PRACTICAL DESIGN

Two kinds of joint for rigid connection of the steel hollow section members are proposed by Chinese relevant Code or Specifications [1,2,3]:the welded hollow spherical joints (WHSJ), and the intersecting joint. The welded hollow spherical joints, which are popular for the domestic MECHANICAL CALCULATION MODEL FOR WELDED excitations, the welded hollow spherical joint undergoes a loading-unloading process repeatedly, and the mechanical behaviors of it are in a state of flux. So the equations derived from the monotone loading are no longer applicable. Currently the welded hollow spherical joint is generally modeled by rigid connection.

MECHANICAL PERFORMANCE OF WELDED HOLLOW

Joints in the spatial grid structure mainly include WHSJs, bolted hollow spherical joints, hub-type joints, cast steel joints, tubular joints, and Temcor joints (Fig. 1) 1,2,3,4,5 . WHSJs were proposed by Professor Liu [6] from Tianjin University in 1965. With a clear load path and convenient connection MECHANICAL PERFORMANCE OF WELDED HOLLOW Joints in the spatial grid structure mainly include WHSJs, bolted hollow spherical joints, hub-type joints, cast steel joints, tubular joints, and Temcor joints (Fig. 1) 1,2,3,4,5 . WHSJs were proposed by Professor Liu [6] from Tianjin University in 1965. With a clear load path and convenient connection

MECHANICAL PERFORMANCE OF WELDED HOLLOW SPHERICAL JOINTS

[21] Liu H.B., Lu J. and Chen Z.H., Residual behavior of welded hollow spherical joints after exposure to elevated temperatures, Journal of Constructional Steel Research, 137, 102-118, 2017. [22] Lu J., Liu H.B. and Chen Z.H., Behavior of Welded Hollow Spherical Joints After Exposure to ISO-834 Standard Fire, Journal of Mechanical behavior of single-layer - Welding in the WorldThe welded hollow spherical joints (WHSJ) have been widely used in space lattice structures. There have been many researchers investigating the mechanical behavior of WHSJ. But few literatures that considered the influence of welding residual stress can be found, let alone the integral structure analysis considering welding residual stress.

Mechanical behavior of single-layer - Welding in the World

The welded hollow spherical joints (WHSJ) have been widely used in space lattice structures. There have been many researchers investigating the mechanical behavior of WHSJ. But few literatures that considered the influence of welding residual stress can be found, let alone the integral structure analysis considering welding residual stress. In this paper, welding residual stress of WHSJ was Mechanical performance of welded hollow spherical joints Nov 01, 2020 · H.B. Liu, J. Lu, Z.H. ChenResidual behavior of welded hollow spherical joints after exposure to elevated temperatures J Constr Steel Res, 137 (2017), pp. 102-118 Google Scholar

Personal Information:Science Publishing Group

From 2017 to 2020, National Natural Science Foundation of China (General Program) , Study on residual mechanical properties of space grid structure with welded hollow spherical after fire. Post-fire Behavior of Welded Hollow Spherical Joints Apr 25, 2018 · Understanding the post-fire residual behavior of welded hollow spherical joints is crucial for fire damage assessment of the space lattice structures. However, the post-fire behavior of welded hollow spherical joints has not been explored in existing studies. In this paper, experimental and numerical studies were conducted to investigate the residual behavior of eccentrically loaded welded hollow spherical joints after fire exposure.

Quarterly Publication Rs. 20 JULY 2019 Weld 18 Bead 2

method was proposed from the post-fire residual behaviour of welded hollow spherical joints of Q235 and Q345 steels at 600 °C, 800 °C, and 1000 °C [10]. Liu et al [11] evaluated the post-fire residual mechanical properties of Q235 and Q345 steel butt welded joints, results revealed that post-fire properties of welded joints were affected with Residual Bearing Capacity of Damaged Large-Diameter Drum Therefore, the members and joints may incur different degrees of damages. However, some damaged members and joints can continue functioning after reasonable assessment and repair. In this study, drum-welded hollow spherical joints (DWHSJs) that are used in Beijings New International Airport were considered as research objects.

Residual bearing capacity of welded hollow spherical

characteristic of WHSJs had significant influence on the residual tensile and compressive capacity. Moreover, the results could also lay a foundation for the reasonable evaluation, repair and reinforcement of the space structure connected by welded hollow spherical joints after corrosion damage. Residual behavior of welded hollow spherical joints after The mechanical behavior of welded hollow spherical joints significantly changed after exposure to temperatures exceeding 600 °C, with phenomena of reductions in stiffness and strength but an

Residual behaviour of welded hollow spherical joints

Welded hollow spherical joints are widely used as a connection pattern in space lattice structures. Understanding the post-fire residual behavior of welded hollow spherical joints is crucial for Residual behaviour of welded hollow spherical joints under Apr 01, 2020 · This paper presents an experimental study of welded hollow spherical joints (WHSJs) under corrosion and de-rusting conditions. First, two scanning tests (3D scanning and scanning electron microscopy (SEM)) and a weight loss test were conducted on the same batch of steel used to manufacture the joints to investigate the corrosion morphology and development of the WHSJs under

Residual behaviour of welded hollow spherical joints under

Welded hollow spherical joints are widely used as a connection pattern in space lattice structures. Understanding the post-fire residual behavior of welded hollow spherical joints is crucial for Techno PressThe grid structures with welded hollow spherical joint (WHSJ) have gained increasing popularity for use in industrial buildings with suspended cranes, and usually welded with steel tube (ST). The fatigue performance of steel tube-welded hollow spherical joint (ST-WHSJ) is however not yet well characterized, and there is little research on

Ultimate bearing capacity of the welded hollow spherical

The results showed that the behavior of welded hollow spherical joints began to change when the exposure temperatures exceeded 600°C, with obvious reductions in both stiffness and strength. Welding in the World Volume 60, issue 1Mechanical behavior of single-layer reticulated shell connected by welded hollow spherical joints with considering welding residual stress Authors. Zhong-Wei Zhao; Han Zhu; Zhi-Hua Chen; Content type:Research Paper; Published:09 November 2015; Pages:61 - 69

Residual behavior of welded hollow spherical joints after

Oct 01, 2017 · The mechanical behavior of welded hollow spherical joints significantly changed after exposure to temperatures exceeding 600 °C, with phenomena of reductions in stiffness and strength but an increase in ductility level. Furthermore, the influences of different cooling methods were remarkable.

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