PCI eLearning Course T120: Design Loads and Load Distribution-PCI BDM Ch 7 Tables 7.3-1, 7.3-2, 7.3-3

PCI BDM Ch 7 Tables 7.3-1, 7.3-2, 7.3-3

Pdf Summary

Chapter 7 of the PCI Bridge Design Manual focuses on loads and load distribution in bridge design. The chapter discusses load combinations and design methods, specifically for the LRFD specifications. <br /><br />Table 7.3-1 provides a list of load combinations and load factors for different limit states. The table includes factors for strength, extreme events, and service conditions. It also includes factors for different load types, such as live load, wind load, and earthquake load.<br /><br />Table 7.3-2 outlines load factors for permanent loads, categorized by the type of load. The table includes factors for components and attachments, downdrag piles, wearing surfaces and utilities, horizontal and vertical earth pressures, locked-in construction stresses, and earth surcharge.<br /><br />Table 7.3-3 provides load factors for permanent loads due to superimposed deformations. The table includes factors for different bridge components, such as segmental and non-segmental superstructures, substructures supporting them, and steel substructures.<br /><br />The chapter emphasizes the need for bridge components and connections to satisfy the applicable combinations of factored extreme force effects at each limit state. The load designations discussed include permanent loads such as dead loads, downdrag, horizontal and vertical earth pressures, and secondary forces from post-tensioning. It also includes force effects due to shrinkage, creep, and accumulated locked-in force effects resulting from the construction process.<br /><br />Overall, this chapter provides important information on load combinations and design methods for bridge engineers to ensure the safety and integrity of bridge structures.

Keywords

PCI Bridge Design Manual

loads

load distribution

bridge design

LRFD specifications

load combinations

load factors

permanent loads

force effects

bridge engineers